/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:08:11,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:08:11,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:08:11,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:08:11,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:08:11,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:08:11,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:08:11,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:08:11,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:08:11,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:08:11,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:08:11,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:08:11,902 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:08:11,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:08:11,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:08:11,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:08:11,903 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:08:11,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:08:11,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:08:11,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:08:11,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:08:11,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:08:11,906 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:08:11,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:08:11,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:08:12,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:08:12,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:08:12,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:08:12,073 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:08:12,074 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:08:12,075 INFO L432 ainManager$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 [2022-03-03 19:08:12,075 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2022-03-03 19:08:12,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:08:12,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:08:12,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:08:12,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:08:12,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:08:12,122 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,128 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,137 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:08:12,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:08:12,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:08:12,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:08:12,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:08:12,146 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,147 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,148 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,148 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,151 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,152 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,153 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 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:08:12,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:08:12,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:08:12,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:08:12,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:08:12" (1/1) ... [2022-03-03 19:08:12,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:08:12,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:12,185 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) [2022-03-03 19:08:12,195 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 [2022-03-03 19:08:12,219 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:08:12,219 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:08:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:08:12,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:08:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:08:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:08:12,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:08:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:08:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:08:12,220 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:08:12,220 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:08:12,220 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:08:12,221 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:08:12,282 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:08:12,283 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:08:12,457 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:08:12,528 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:08:12,529 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-03 19:08:12,530 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:08:12 BoogieIcfgContainer [2022-03-03 19:08:12,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:08:12,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:08:12,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:08:12,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:08:12,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:08:12" (1/2) ... [2022-03-03 19:08:12,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c1ea89 and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:08:12, skipping insertion in model container [2022-03-03 19:08:12,535 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 03.03 07:08:12" (2/2) ... [2022-03-03 19:08:12,536 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2022-03-03 19:08:12,540 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:08:12,540 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:08:12,541 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:08:12,541 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:08:12,591 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:08:12,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:08:12,627 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, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:08:12,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:08:12,632 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2022-03-03 19:08:12,663 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) [2022-03-03 19:08:12,664 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) [2022-03-03 19:08:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:08:12,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:12,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:12,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash -29429742, now seen corresponding path program 1 times [2022-03-03 19:08:12,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:12,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664856867] [2022-03-03 19:08:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:12,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:12,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:12,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664856867] [2022-03-03 19:08:12,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664856867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:12,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:12,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:12,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292102936] [2022-03-03 19:08:12,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:12,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:12,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:13,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:13,006 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) [2022-03-03 19:08:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:13,276 INFO L93 Difference]: Finished difference Result 362 states and 1164 transitions. [2022-03-03 19:08:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:08:13,278 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 [2022-03-03 19:08:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:13,289 INFO L225 Difference]: With dead ends: 362 [2022-03-03 19:08:13,289 INFO L226 Difference]: Without dead ends: 347 [2022-03-03 19:08:13,290 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 [2022-03-03 19:08:13,292 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:13,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-03 19:08:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 126. [2022-03-03 19:08:13,347 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) [2022-03-03 19:08:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2022-03-03 19:08:13,349 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2022-03-03 19:08:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:13,350 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2022-03-03 19:08:13,350 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) [2022-03-03 19:08:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2022-03-03 19:08:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:08:13,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:13,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:13,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:08:13,352 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1669447950, now seen corresponding path program 2 times [2022-03-03 19:08:13,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:13,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109915972] [2022-03-03 19:08:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:13,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:13,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:13,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109915972] [2022-03-03 19:08:13,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109915972] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:13,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:13,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:13,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367544477] [2022-03-03 19:08:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:13,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:13,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:13,524 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) [2022-03-03 19:08:13,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:13,715 INFO L93 Difference]: Finished difference Result 285 states and 894 transitions. [2022-03-03 19:08:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:13,716 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 [2022-03-03 19:08:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:13,718 INFO L225 Difference]: With dead ends: 285 [2022-03-03 19:08:13,718 INFO L226 Difference]: Without dead ends: 270 [2022-03-03 19:08:13,718 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 [2022-03-03 19:08:13,719 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:13,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-03 19:08:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 132. [2022-03-03 19:08:13,727 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) [2022-03-03 19:08:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2022-03-03 19:08:13,728 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2022-03-03 19:08:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:13,728 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2022-03-03 19:08:13,728 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) [2022-03-03 19:08:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2022-03-03 19:08:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:08:13,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:13,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:13,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 19:08:13,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash 332003462, now seen corresponding path program 3 times [2022-03-03 19:08:13,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:13,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380230516] [2022-03-03 19:08:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:13,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:13,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380230516] [2022-03-03 19:08:13,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380230516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:13,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:13,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:13,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288868959] [2022-03-03 19:08:13,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:13,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:13,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:13,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:13,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:13,892 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) [2022-03-03 19:08:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:14,109 INFO L93 Difference]: Finished difference Result 270 states and 805 transitions. [2022-03-03 19:08:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:14,110 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 [2022-03-03 19:08:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:14,111 INFO L225 Difference]: With dead ends: 270 [2022-03-03 19:08:14,111 INFO L226 Difference]: Without dead ends: 255 [2022-03-03 19:08:14,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:08:14,112 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:14,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-03 19:08:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 140. [2022-03-03 19:08:14,118 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) [2022-03-03 19:08:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-03-03 19:08:14,119 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-03-03 19:08:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:14,119 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-03-03 19:08:14,119 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) [2022-03-03 19:08:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-03-03 19:08:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:08:14,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:14,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:14,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:08:14,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -198832182, now seen corresponding path program 4 times [2022-03-03 19:08:14,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:14,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145025970] [2022-03-03 19:08:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:14,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:14,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:14,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145025970] [2022-03-03 19:08:14,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145025970] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:14,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:14,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:14,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581121851] [2022-03-03 19:08:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:14,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:14,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:14,262 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) [2022-03-03 19:08:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:14,468 INFO L93 Difference]: Finished difference Result 263 states and 775 transitions. [2022-03-03 19:08:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:14,468 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 [2022-03-03 19:08:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:14,470 INFO L225 Difference]: With dead ends: 263 [2022-03-03 19:08:14,470 INFO L226 Difference]: Without dead ends: 248 [2022-03-03 19:08:14,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:08:14,471 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:14,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-03 19:08:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-03-03 19:08:14,481 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) [2022-03-03 19:08:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2022-03-03 19:08:14,482 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2022-03-03 19:08:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:14,482 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2022-03-03 19:08:14,482 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) [2022-03-03 19:08:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2022-03-03 19:08:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:08:14,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:14,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:14,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:08:14,483 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1457604362, now seen corresponding path program 5 times [2022-03-03 19:08:14,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:14,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162332306] [2022-03-03 19:08:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:14,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:14,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:14,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162332306] [2022-03-03 19:08:14,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162332306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:14,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:14,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:14,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510124016] [2022-03-03 19:08:14,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:14,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:14,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:14,623 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) [2022-03-03 19:08:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:14,783 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2022-03-03 19:08:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:14,784 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 [2022-03-03 19:08:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:14,785 INFO L225 Difference]: With dead ends: 229 [2022-03-03 19:08:14,785 INFO L226 Difference]: Without dead ends: 214 [2022-03-03 19:08:14,785 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 [2022-03-03 19:08:14,786 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 [2022-03-03 19:08:14,786 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] [2022-03-03 19:08:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-03 19:08:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2022-03-03 19:08:14,790 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) [2022-03-03 19:08:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-03-03 19:08:14,791 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-03-03 19:08:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:14,791 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-03-03 19:08:14,791 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) [2022-03-03 19:08:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-03-03 19:08:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:08:14,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:14,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:14,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:08:14,792 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:14,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:14,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1842890102, now seen corresponding path program 6 times [2022-03-03 19:08:14,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:14,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193026750] [2022-03-03 19:08:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:14,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:14,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:14,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193026750] [2022-03-03 19:08:14,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193026750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:14,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:14,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:14,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083710103] [2022-03-03 19:08:14,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:14,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:14,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:14,873 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) [2022-03-03 19:08:15,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,117 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2022-03-03 19:08:15,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:08:15,118 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 [2022-03-03 19:08:15,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,119 INFO L225 Difference]: With dead ends: 336 [2022-03-03 19:08:15,119 INFO L226 Difference]: Without dead ends: 321 [2022-03-03 19:08:15,120 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 [2022-03-03 19:08:15,120 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 [2022-03-03 19:08:15,121 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] [2022-03-03 19:08:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-03 19:08:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2022-03-03 19:08:15,125 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) [2022-03-03 19:08:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2022-03-03 19:08:15,126 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2022-03-03 19:08:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,126 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2022-03-03 19:08:15,126 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) [2022-03-03 19:08:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2022-03-03 19:08:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:08:15,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,127 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-03 19:08:15,127 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1236732740, now seen corresponding path program 1 times [2022-03-03 19:08:15,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157551239] [2022-03-03 19:08:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:15,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157551239] [2022-03-03 19:08:15,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157551239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:15,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:15,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:08:15,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112180869] [2022-03-03 19:08:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:08:15,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:08:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:08:15,142 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) [2022-03-03 19:08:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,165 INFO L93 Difference]: Finished difference Result 163 states and 538 transitions. [2022-03-03 19:08:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:08:15,165 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 [2022-03-03 19:08:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,166 INFO L225 Difference]: With dead ends: 163 [2022-03-03 19:08:15,166 INFO L226 Difference]: Without dead ends: 163 [2022-03-03 19:08:15,166 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 [2022-03-03 19:08:15,167 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 [2022-03-03 19:08:15,167 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] [2022-03-03 19:08:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-03 19:08:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-03 19:08:15,170 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) [2022-03-03 19:08:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 538 transitions. [2022-03-03 19:08:15,171 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 538 transitions. Word has length 15 [2022-03-03 19:08:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,171 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 538 transitions. [2022-03-03 19:08:15,171 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) [2022-03-03 19:08:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 538 transitions. [2022-03-03 19:08:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:08:15,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-03 19:08:15,172 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1228810757, now seen corresponding path program 1 times [2022-03-03 19:08:15,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10765440] [2022-03-03 19:08:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:15,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10765440] [2022-03-03 19:08:15,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10765440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:15,185 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:15,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:08:15,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424678438] [2022-03-03 19:08:15,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:08:15,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:08:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:08:15,186 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) [2022-03-03 19:08:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,209 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2022-03-03 19:08:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:08:15,210 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 [2022-03-03 19:08:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,211 INFO L225 Difference]: With dead ends: 192 [2022-03-03 19:08:15,211 INFO L226 Difference]: Without dead ends: 192 [2022-03-03 19:08:15,211 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 [2022-03-03 19:08:15,212 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 [2022-03-03 19:08:15,212 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] [2022-03-03 19:08:15,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-03 19:08:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-03-03 19:08:15,216 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) [2022-03-03 19:08:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2022-03-03 19:08:15,216 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2022-03-03 19:08:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,216 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2022-03-03 19:08:15,217 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) [2022-03-03 19:08:15,217 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2022-03-03 19:08:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:08:15,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-03 19:08:15,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1075245774, now seen corresponding path program 1 times [2022-03-03 19:08:15,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762969798] [2022-03-03 19:08:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:15,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762969798] [2022-03-03 19:08:15,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762969798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:15,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:15,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:08:15,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092666062] [2022-03-03 19:08:15,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:08:15,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:08:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:08:15,234 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) [2022-03-03 19:08:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,257 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2022-03-03 19:08:15,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:08:15,257 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 [2022-03-03 19:08:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,258 INFO L225 Difference]: With dead ends: 223 [2022-03-03 19:08:15,258 INFO L226 Difference]: Without dead ends: 223 [2022-03-03 19:08:15,259 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 [2022-03-03 19:08:15,259 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 [2022-03-03 19:08:15,259 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] [2022-03-03 19:08:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-03 19:08:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-03-03 19:08:15,263 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) [2022-03-03 19:08:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2022-03-03 19:08:15,264 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2022-03-03 19:08:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,264 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2022-03-03 19:08:15,264 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) [2022-03-03 19:08:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2022-03-03 19:08:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:15,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,265 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-03 19:08:15,265 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,265 INFO L85 PathProgramCache]: Analyzing trace with hash -8420014, now seen corresponding path program 1 times [2022-03-03 19:08:15,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672302893] [2022-03-03 19:08:15,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:15,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672302893] [2022-03-03 19:08:15,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672302893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:15,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:15,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:15,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983910706] [2022-03-03 19:08:15,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:15,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:15,299 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) [2022-03-03 19:08:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,375 INFO L93 Difference]: Finished difference Result 571 states and 1745 transitions. [2022-03-03 19:08:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:08:15,375 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 [2022-03-03 19:08:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,377 INFO L225 Difference]: With dead ends: 571 [2022-03-03 19:08:15,377 INFO L226 Difference]: Without dead ends: 495 [2022-03-03 19:08:15,377 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 [2022-03-03 19:08:15,378 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:15,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-03 19:08:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2022-03-03 19:08:15,384 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) [2022-03-03 19:08:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 758 transitions. [2022-03-03 19:08:15,384 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 758 transitions. Word has length 16 [2022-03-03 19:08:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,385 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 758 transitions. [2022-03-03 19:08:15,385 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) [2022-03-03 19:08:15,385 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 758 transitions. [2022-03-03 19:08:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:15,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-03 19:08:15,386 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 245083442, now seen corresponding path program 1 times [2022-03-03 19:08:15,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481678029] [2022-03-03 19:08:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:15,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481678029] [2022-03-03 19:08:15,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481678029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:15,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:15,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:15,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314302248] [2022-03-03 19:08:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:15,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:15,420 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) [2022-03-03 19:08:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,474 INFO L93 Difference]: Finished difference Result 403 states and 1190 transitions. [2022-03-03 19:08:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:15,475 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 [2022-03-03 19:08:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,476 INFO L225 Difference]: With dead ends: 403 [2022-03-03 19:08:15,476 INFO L226 Difference]: Without dead ends: 355 [2022-03-03 19:08:15,476 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 [2022-03-03 19:08:15,477 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:15,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:08:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-03 19:08:15,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 233. [2022-03-03 19:08:15,482 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) [2022-03-03 19:08:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2022-03-03 19:08:15,483 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2022-03-03 19:08:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,483 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2022-03-03 19:08:15,483 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) [2022-03-03 19:08:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2022-03-03 19:08:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:15,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-03 19:08:15,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1080130578, now seen corresponding path program 2 times [2022-03-03 19:08:15,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445133896] [2022-03-03 19:08:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:15,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445133896] [2022-03-03 19:08:15,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445133896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:15,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:15,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:15,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679296637] [2022-03-03 19:08:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:15,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:15,521 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:15,603 INFO L93 Difference]: Finished difference Result 500 states and 1476 transitions. [2022-03-03 19:08:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:08:15,604 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 [2022-03-03 19:08:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:15,606 INFO L225 Difference]: With dead ends: 500 [2022-03-03 19:08:15,606 INFO L226 Difference]: Without dead ends: 460 [2022-03-03 19:08:15,606 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 [2022-03-03 19:08:15,606 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:15,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-03 19:08:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 226. [2022-03-03 19:08:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 3.2844444444444445) internal successors, (739), 225 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 739 transitions. [2022-03-03 19:08:15,613 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 739 transitions. Word has length 16 [2022-03-03 19:08:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 739 transitions. [2022-03-03 19:08:15,613 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) [2022-03-03 19:08:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 739 transitions. [2022-03-03 19:08:15,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:15,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:15,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:15,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-03 19:08:15,614 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:15,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:15,614 INFO L85 PathProgramCache]: Analyzing trace with hash 94528582, now seen corresponding path program 1 times [2022-03-03 19:08:15,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:15,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119425056] [2022-03-03 19:08:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:15,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:15,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119425056] [2022-03-03 19:08:15,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119425056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:15,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846165459] [2022-03-03 19:08:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:15,647 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) [2022-03-03 19:08:15,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:08:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:08:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:15,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:15,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:15,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846165459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:15,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:15,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-03-03 19:08:15,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610100202] [2022-03-03 19:08:15,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:15,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:08:15,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:08:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:08:15,934 INFO L87 Difference]: Start difference. First operand 226 states and 739 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,066 INFO L93 Difference]: Finished difference Result 535 states and 1546 transitions. [2022-03-03 19:08:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:08:16,066 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 [2022-03-03 19:08:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,068 INFO L225 Difference]: With dead ends: 535 [2022-03-03 19:08:16,068 INFO L226 Difference]: Without dead ends: 471 [2022-03-03 19:08:16,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-03-03 19:08:16,068 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:16,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 69 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:16,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-03 19:08:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 240. [2022-03-03 19:08:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1841004184100417) internal successors, (761), 239 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 761 transitions. [2022-03-03 19:08:16,075 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 761 transitions. Word has length 16 [2022-03-03 19:08:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,075 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 761 transitions. [2022-03-03 19:08:16,075 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) [2022-03-03 19:08:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 761 transitions. [2022-03-03 19:08:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:16,076 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:16,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:16,292 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 [2022-03-03 19:08:16,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,293 INFO L85 PathProgramCache]: Analyzing trace with hash -757483642, now seen corresponding path program 2 times [2022-03-03 19:08:16,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511536432] [2022-03-03 19:08:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:16,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511536432] [2022-03-03 19:08:16,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511536432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:16,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:16,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:16,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053386263] [2022-03-03 19:08:16,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:16,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:16,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:16,354 INFO L87 Difference]: Start difference. First operand 240 states and 761 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,459 INFO L93 Difference]: Finished difference Result 461 states and 1294 transitions. [2022-03-03 19:08:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:08:16,460 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 [2022-03-03 19:08:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,461 INFO L225 Difference]: With dead ends: 461 [2022-03-03 19:08:16,462 INFO L226 Difference]: Without dead ends: 434 [2022-03-03 19:08:16,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:08:16,462 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:16,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-03 19:08:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 240. [2022-03-03 19:08:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1757322175732217) internal successors, (759), 239 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 759 transitions. [2022-03-03 19:08:16,469 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 759 transitions. Word has length 16 [2022-03-03 19:08:16,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,469 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 759 transitions. [2022-03-03 19:08:16,469 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) [2022-03-03 19:08:16,469 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 759 transitions. [2022-03-03 19:08:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:16,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:16,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-03 19:08:16,470 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash -472042042, now seen corresponding path program 2 times [2022-03-03 19:08:16,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485827441] [2022-03-03 19:08:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:16,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485827441] [2022-03-03 19:08:16,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485827441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:16,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:16,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:16,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321345744] [2022-03-03 19:08:16,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:16,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:16,500 INFO L87 Difference]: Start difference. First operand 240 states and 759 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,552 INFO L93 Difference]: Finished difference Result 398 states and 1140 transitions. [2022-03-03 19:08:16,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:16,553 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 [2022-03-03 19:08:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,554 INFO L225 Difference]: With dead ends: 398 [2022-03-03 19:08:16,554 INFO L226 Difference]: Without dead ends: 361 [2022-03-03 19:08:16,556 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 [2022-03-03 19:08:16,556 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:16,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:08:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-03 19:08:16,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 240. [2022-03-03 19:08:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1673640167364017) internal successors, (757), 239 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 757 transitions. [2022-03-03 19:08:16,562 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 757 transitions. Word has length 16 [2022-03-03 19:08:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,562 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 757 transitions. [2022-03-03 19:08:16,562 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) [2022-03-03 19:08:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 757 transitions. [2022-03-03 19:08:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:16,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:16,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-03 19:08:16,563 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1777677254, now seen corresponding path program 3 times [2022-03-03 19:08:16,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025260016] [2022-03-03 19:08:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:16,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025260016] [2022-03-03 19:08:16,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025260016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:16,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:16,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:08:16,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648761751] [2022-03-03 19:08:16,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:08:16,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:08:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:08:16,581 INFO L87 Difference]: Start difference. First operand 240 states and 757 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,619 INFO L93 Difference]: Finished difference Result 343 states and 1007 transitions. [2022-03-03 19:08:16,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:08:16,619 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 [2022-03-03 19:08:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,620 INFO L225 Difference]: With dead ends: 343 [2022-03-03 19:08:16,620 INFO L226 Difference]: Without dead ends: 271 [2022-03-03 19:08:16,620 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 [2022-03-03 19:08:16,621 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:16,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:08:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-03 19:08:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 240. [2022-03-03 19:08:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1338912133891212) internal successors, (749), 239 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 749 transitions. [2022-03-03 19:08:16,626 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 749 transitions. Word has length 16 [2022-03-03 19:08:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,626 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 749 transitions. [2022-03-03 19:08:16,626 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) [2022-03-03 19:08:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 749 transitions. [2022-03-03 19:08:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:16,627 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:16,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-03 19:08:16,627 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1203369498, now seen corresponding path program 3 times [2022-03-03 19:08:16,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457037275] [2022-03-03 19:08:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:16,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457037275] [2022-03-03 19:08:16,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457037275] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:16,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:16,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:08:16,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988505827] [2022-03-03 19:08:16,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:08:16,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:08:16,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:08:16,642 INFO L87 Difference]: Start difference. First operand 240 states and 749 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,681 INFO L93 Difference]: Finished difference Result 301 states and 906 transitions. [2022-03-03 19:08:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:08:16,681 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 [2022-03-03 19:08:16,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,682 INFO L225 Difference]: With dead ends: 301 [2022-03-03 19:08:16,682 INFO L226 Difference]: Without dead ends: 229 [2022-03-03 19:08:16,682 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 [2022-03-03 19:08:16,683 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:16,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:08:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-03 19:08:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 219. [2022-03-03 19:08:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 3.036697247706422) internal successors, (662), 218 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 662 transitions. [2022-03-03 19:08:16,687 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 662 transitions. Word has length 16 [2022-03-03 19:08:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,687 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 662 transitions. [2022-03-03 19:08:16,687 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) [2022-03-03 19:08:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 662 transitions. [2022-03-03 19:08:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:16,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:16,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-03 19:08:16,688 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash 664668842, now seen corresponding path program 4 times [2022-03-03 19:08:16,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462417339] [2022-03-03 19:08:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:16,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462417339] [2022-03-03 19:08:16,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462417339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:16,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:16,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:08:16,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967810988] [2022-03-03 19:08:16,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:08:16,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:08:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:08:16,705 INFO L87 Difference]: Start difference. First operand 219 states and 662 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,747 INFO L93 Difference]: Finished difference Result 272 states and 791 transitions. [2022-03-03 19:08:16,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:08:16,747 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 [2022-03-03 19:08:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,748 INFO L225 Difference]: With dead ends: 272 [2022-03-03 19:08:16,748 INFO L226 Difference]: Without dead ends: 209 [2022-03-03 19:08:16,749 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 [2022-03-03 19:08:16,749 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:16,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:08:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-03 19:08:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-03 19:08:16,752 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) [2022-03-03 19:08:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2022-03-03 19:08:16,753 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2022-03-03 19:08:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,753 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2022-03-03 19:08:16,753 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) [2022-03-03 19:08:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2022-03-03 19:08:16,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:08:16,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,754 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:08:16,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-03 19:08:16,754 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 402212618, now seen corresponding path program 3 times [2022-03-03 19:08:16,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67625809] [2022-03-03 19:08:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:16,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:16,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67625809] [2022-03-03 19:08:16,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67625809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:08:16,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:08:16,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:08:16,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071591633] [2022-03-03 19:08:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:08:16,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:08:16,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:16,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:08:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:08:16,776 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) [2022-03-03 19:08:16,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:16,828 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2022-03-03 19:08:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:08:16,828 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 [2022-03-03 19:08:16,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:16,829 INFO L225 Difference]: With dead ends: 238 [2022-03-03 19:08:16,829 INFO L226 Difference]: Without dead ends: 189 [2022-03-03 19:08:16,829 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 [2022-03-03 19:08:16,830 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 [2022-03-03 19:08:16,830 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] [2022-03-03 19:08:16,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-03 19:08:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-03 19:08:16,833 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) [2022-03-03 19:08:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-03 19:08:16,833 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2022-03-03 19:08:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:16,834 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-03 19:08:16,834 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) [2022-03-03 19:08:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-03 19:08:16,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:16,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:16,834 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] [2022-03-03 19:08:16,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-03 19:08:16,834 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:16,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1843106918, now seen corresponding path program 1 times [2022-03-03 19:08:16,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:16,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244200086] [2022-03-03 19:08:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:17,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:17,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244200086] [2022-03-03 19:08:17,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244200086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:17,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361531955] [2022-03-03 19:08:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:17,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:17,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:17,036 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) [2022-03-03 19:08:17,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:08:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:17,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:17,286 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 250 treesize of output 214 [2022-03-03 19:08:17,673 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 248 treesize of output 218 [2022-03-03 19:08:17,677 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 186 treesize of output 152 [2022-03-03 19:08:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:17,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:18,259 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 246 treesize of output 214 [2022-03-03 19:08:18,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:18,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 178 [2022-03-03 19:08:18,743 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 173 treesize of output 153 [2022-03-03 19:08:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:19,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361531955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:19,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:19,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-03 19:08:19,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895493700] [2022-03-03 19:08:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:19,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:08:19,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:08:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:08:19,067 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:20,639 INFO L93 Difference]: Finished difference Result 756 states and 2092 transitions. [2022-03-03 19:08:20,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:08:20,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:20,641 INFO L225 Difference]: With dead ends: 756 [2022-03-03 19:08:20,641 INFO L226 Difference]: Without dead ends: 606 [2022-03-03 19:08:20,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=436, Invalid=1456, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:08:20,642 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 266 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:20,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 249 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:20,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-03-03 19:08:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 236. [2022-03-03 19:08:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 3.157446808510638) internal successors, (742), 235 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 742 transitions. [2022-03-03 19:08:20,652 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 742 transitions. Word has length 20 [2022-03-03 19:08:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:20,652 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 742 transitions. [2022-03-03 19:08:20,652 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) [2022-03-03 19:08:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 742 transitions. [2022-03-03 19:08:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:20,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:20,653 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] [2022-03-03 19:08:20,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:20,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-03-03 19:08:20,869 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1866509036, now seen corresponding path program 2 times [2022-03-03 19:08:20,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:20,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544452281] [2022-03-03 19:08:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:20,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:21,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:21,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544452281] [2022-03-03 19:08:21,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544452281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:21,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339731574] [2022-03-03 19:08:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:21,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:21,104 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) [2022-03-03 19:08:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:08:21,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:21,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:21,253 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 212 treesize of output 182 [2022-03-03 19:08:21,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-03 19:08:21,584 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 142 treesize of output 124 [2022-03-03 19:08:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:21,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:21,934 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 263 treesize of output 223 [2022-03-03 19:08:22,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:22,374 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 196 treesize of output 178 [2022-03-03 19:08:22,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-03 19:08:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:22,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339731574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:22,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:22,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-03 19:08:22,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919004678] [2022-03-03 19:08:22,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:22,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:08:22,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:22,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:08:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:08:22,589 INFO L87 Difference]: Start difference. First operand 236 states and 742 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:23,563 INFO L93 Difference]: Finished difference Result 574 states and 1650 transitions. [2022-03-03 19:08:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:08:23,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:23,565 INFO L225 Difference]: With dead ends: 574 [2022-03-03 19:08:23,565 INFO L226 Difference]: Without dead ends: 490 [2022-03-03 19:08:23,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:08:23,566 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:23,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 274 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-03-03 19:08:23,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 274. [2022-03-03 19:08:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.10989010989011) internal successors, (849), 273 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 849 transitions. [2022-03-03 19:08:23,580 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 849 transitions. Word has length 20 [2022-03-03 19:08:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:23,580 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 849 transitions. [2022-03-03 19:08:23,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 849 transitions. [2022-03-03 19:08:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:23,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:23,582 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] [2022-03-03 19:08:23,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:23,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:23,798 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -820679224, now seen corresponding path program 3 times [2022-03-03 19:08:23,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:23,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912111061] [2022-03-03 19:08:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:23,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:23,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:23,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912111061] [2022-03-03 19:08:23,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912111061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:23,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865624988] [2022-03-03 19:08:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:23,977 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) [2022-03-03 19:08:24,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:08:24,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:08:24,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:24,107 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 173 treesize of output 149 [2022-03-03 19:08:24,415 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 229 treesize of output 197 [2022-03-03 19:08:24,418 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 173 treesize of output 157 [2022-03-03 19:08:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:24,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:24,810 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 246 treesize of output 214 [2022-03-03 19:08:25,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:25,189 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 196 treesize of output 178 [2022-03-03 19:08:25,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-03 19:08:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:25,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865624988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:25,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:25,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-03-03 19:08:25,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046479416] [2022-03-03 19:08:25,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:25,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:08:25,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:08:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:08:25,422 INFO L87 Difference]: Start difference. First operand 274 states and 849 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:26,629 INFO L93 Difference]: Finished difference Result 582 states and 1687 transitions. [2022-03-03 19:08:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:08:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:26,632 INFO L225 Difference]: With dead ends: 582 [2022-03-03 19:08:26,632 INFO L226 Difference]: Without dead ends: 535 [2022-03-03 19:08:26,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:08:26,633 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 176 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:26,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 232 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-03 19:08:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 272. [2022-03-03 19:08:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.081180811808118) internal successors, (835), 271 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 835 transitions. [2022-03-03 19:08:26,639 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 835 transitions. Word has length 20 [2022-03-03 19:08:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:26,639 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 835 transitions. [2022-03-03 19:08:26,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 835 transitions. [2022-03-03 19:08:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:26,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:26,640 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] [2022-03-03 19:08:26,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:26,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:26,851 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1053139844, now seen corresponding path program 4 times [2022-03-03 19:08:26,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:26,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525679519] [2022-03-03 19:08:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:27,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:27,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525679519] [2022-03-03 19:08:27,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525679519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:27,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839784639] [2022-03-03 19:08:27,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:27,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:27,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:27,081 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) [2022-03-03 19:08:27,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:08:27,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:27,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:27,282 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 264 treesize of output 238 [2022-03-03 19:08:27,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-03 19:08:27,495 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 153 treesize of output 133 [2022-03-03 19:08:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:27,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:27,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:08:28,465 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 176 treesize of output 156 [2022-03-03 19:08:28,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:28,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 163 [2022-03-03 19:08:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:28,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839784639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:28,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:28,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-03-03 19:08:28,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323949139] [2022-03-03 19:08:28,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:08:28,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:08:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:08:28,634 INFO L87 Difference]: Start difference. First operand 272 states and 835 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:30,247 INFO L93 Difference]: Finished difference Result 774 states and 2234 transitions. [2022-03-03 19:08:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:08:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:30,250 INFO L225 Difference]: With dead ends: 774 [2022-03-03 19:08:30,250 INFO L226 Difference]: Without dead ends: 687 [2022-03-03 19:08:30,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=446, Invalid=1810, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:08:30,250 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 173 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:30,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 378 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:08:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-03 19:08:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 312. [2022-03-03 19:08:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.0192926045016075) internal successors, (939), 311 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 939 transitions. [2022-03-03 19:08:30,258 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 939 transitions. Word has length 20 [2022-03-03 19:08:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:30,258 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 939 transitions. [2022-03-03 19:08:30,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 939 transitions. [2022-03-03 19:08:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:30,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:30,260 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] [2022-03-03 19:08:30,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:30,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:08:30,481 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1025069888, now seen corresponding path program 5 times [2022-03-03 19:08:30,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:30,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826678111] [2022-03-03 19:08:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:30,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:30,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826678111] [2022-03-03 19:08:30,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826678111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:30,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388999349] [2022-03-03 19:08:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:30,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:30,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:30,621 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) [2022-03-03 19:08:30,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:08:30,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:08:30,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:30,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:30,745 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 160 treesize of output 146 [2022-03-03 19:08:30,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 191 [2022-03-03 19:08:30,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-03-03 19:08:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:31,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:31,374 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 206 treesize of output 186 [2022-03-03 19:08:31,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:31,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:08:31,899 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 257 treesize of output 223 [2022-03-03 19:08:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:32,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388999349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:32,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:32,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-03 19:08:32,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972752897] [2022-03-03 19:08:32,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:32,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:08:32,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:08:32,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:08:32,105 INFO L87 Difference]: Start difference. First operand 312 states and 939 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:32,477 INFO L93 Difference]: Finished difference Result 472 states and 1411 transitions. [2022-03-03 19:08:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:08:32,478 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 [2022-03-03 19:08:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:32,480 INFO L225 Difference]: With dead ends: 472 [2022-03-03 19:08:32,480 INFO L226 Difference]: Without dead ends: 433 [2022-03-03 19:08:32,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:08:32,480 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 111 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:32,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 163 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-03-03 19:08:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 317. [2022-03-03 19:08:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.018987341772152) internal successors, (954), 316 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 954 transitions. [2022-03-03 19:08:32,486 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 954 transitions. Word has length 20 [2022-03-03 19:08:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:32,486 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 954 transitions. [2022-03-03 19:08:32,486 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) [2022-03-03 19:08:32,486 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 954 transitions. [2022-03-03 19:08:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:32,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:32,487 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] [2022-03-03 19:08:32,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:32,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:32,703 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash 150420756, now seen corresponding path program 6 times [2022-03-03 19:08:32,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:32,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891198681] [2022-03-03 19:08:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:32,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:32,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891198681] [2022-03-03 19:08:32,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891198681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:32,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766809095] [2022-03-03 19:08:32,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:32,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:32,861 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) [2022-03-03 19:08:32,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:08:32,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:08:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-03 19:08:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:33,190 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 219 treesize of output 197 [2022-03-03 19:08:33,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:33,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 159 [2022-03-03 19:08:33,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:33,493 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 152 [2022-03-03 19:08:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:33,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:34,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:34,295 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 220 treesize of output 204 [2022-03-03 19:08:34,737 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 44 treesize of output 36 [2022-03-03 19:08:34,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:34,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 60 [2022-03-03 19:08:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:34,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766809095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:34,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:34,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 24 [2022-03-03 19:08:34,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650182308] [2022-03-03 19:08:34,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:34,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:08:34,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:34,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:08:34,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:34,912 INFO L87 Difference]: Start difference. First operand 317 states and 954 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:37,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:37,513 INFO L93 Difference]: Finished difference Result 876 states and 2527 transitions. [2022-03-03 19:08:37,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:08:37,514 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 [2022-03-03 19:08:37,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:37,516 INFO L225 Difference]: With dead ends: 876 [2022-03-03 19:08:37,516 INFO L226 Difference]: Without dead ends: 704 [2022-03-03 19:08:37,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:08:37,518 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:37,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 522 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:08:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-03 19:08:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 350. [2022-03-03 19:08:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.04297994269341) internal successors, (1062), 349 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1062 transitions. [2022-03-03 19:08:37,531 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1062 transitions. Word has length 20 [2022-03-03 19:08:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:37,531 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1062 transitions. [2022-03-03 19:08:37,532 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) [2022-03-03 19:08:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1062 transitions. [2022-03-03 19:08:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:37,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:37,534 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] [2022-03-03 19:08:37,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-03 19:08:37,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:37,755 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash -903528158, now seen corresponding path program 7 times [2022-03-03 19:08:37,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:37,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700621776] [2022-03-03 19:08:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:37,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:37,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700621776] [2022-03-03 19:08:37,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700621776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:37,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717703583] [2022-03-03 19:08:37,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:37,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:37,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:37,950 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) [2022-03-03 19:08:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:08:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:37,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:37,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:38,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:08:38,307 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 156 treesize of output 136 [2022-03-03 19:08:38,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:08:38,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 146 [2022-03-03 19:08:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:38,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:38,661 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 223 treesize of output 203 [2022-03-03 19:08:39,009 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 282 treesize of output 238 [2022-03-03 19:08:39,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:39,018 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 251 treesize of output 229 [2022-03-03 19:08:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:39,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717703583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:39,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:39,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:08:39,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397503711] [2022-03-03 19:08:39,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:39,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:08:39,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:08:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:08:39,533 INFO L87 Difference]: Start difference. First operand 350 states and 1062 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:40,311 INFO L93 Difference]: Finished difference Result 783 states and 2214 transitions. [2022-03-03 19:08:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:08:40,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:40,314 INFO L225 Difference]: With dead ends: 783 [2022-03-03 19:08:40,314 INFO L226 Difference]: Without dead ends: 655 [2022-03-03 19:08:40,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=339, Invalid=1467, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:08:40,314 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:40,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 275 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:08:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-03 19:08:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 364. [2022-03-03 19:08:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 3.0853994490358128) internal successors, (1120), 363 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1120 transitions. [2022-03-03 19:08:40,337 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1120 transitions. Word has length 20 [2022-03-03 19:08:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:40,337 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1120 transitions. [2022-03-03 19:08:40,337 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) [2022-03-03 19:08:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1120 transitions. [2022-03-03 19:08:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:40,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:40,338 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] [2022-03-03 19:08:40,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-03 19:08:40,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 19:08:40,538 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:40,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash -429455834, now seen corresponding path program 8 times [2022-03-03 19:08:40,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:40,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649860874] [2022-03-03 19:08:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:40,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:40,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649860874] [2022-03-03 19:08:40,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649860874] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:40,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101941734] [2022-03-03 19:08:40,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:40,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:40,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:40,624 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) [2022-03-03 19:08:40,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:08:40,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:40,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:40,759 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 171 treesize of output 153 [2022-03-03 19:08:40,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 158 [2022-03-03 19:08:40,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 120 [2022-03-03 19:08:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:41,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:41,177 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 176 treesize of output 156 [2022-03-03 19:08:41,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:41,443 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 214 treesize of output 196 [2022-03-03 19:08:41,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-03-03 19:08:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:41,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101941734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:41,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:41,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:08:41,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415956393] [2022-03-03 19:08:41,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:41,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:08:41,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:08:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:08:41,786 INFO L87 Difference]: Start difference. First operand 364 states and 1120 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:42,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:42,105 INFO L93 Difference]: Finished difference Result 641 states and 1886 transitions. [2022-03-03 19:08:42,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:08:42,105 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 [2022-03-03 19:08:42,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:42,107 INFO L225 Difference]: With dead ends: 641 [2022-03-03 19:08:42,107 INFO L226 Difference]: Without dead ends: 511 [2022-03-03 19:08:42,107 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 [2022-03-03 19:08:42,107 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:42,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 154 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-03 19:08:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 369. [2022-03-03 19:08:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0842391304347827) internal successors, (1135), 368 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1135 transitions. [2022-03-03 19:08:42,113 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1135 transitions. Word has length 20 [2022-03-03 19:08:42,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:42,113 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1135 transitions. [2022-03-03 19:08:42,113 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) [2022-03-03 19:08:42,113 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1135 transitions. [2022-03-03 19:08:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:42,114 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:42,114 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] [2022-03-03 19:08:42,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:42,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:08:42,335 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2074195750, now seen corresponding path program 9 times [2022-03-03 19:08:42,335 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:42,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917227933] [2022-03-03 19:08:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:42,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:42,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917227933] [2022-03-03 19:08:42,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917227933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:42,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909103580] [2022-03-03 19:08:42,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:42,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:42,417 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) [2022-03-03 19:08:42,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:08:42,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:08:42,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:42,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:42,564 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 212 treesize of output 192 [2022-03-03 19:08:42,901 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 337 treesize of output 277 [2022-03-03 19:08:42,925 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 246 treesize of output 222 [2022-03-03 19:08:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:43,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:43,388 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 252 treesize of output 218 [2022-03-03 19:08:43,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:43,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2022-03-03 19:08:43,719 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 191 treesize of output 171 [2022-03-03 19:08:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:43,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909103580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:43,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:43,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:08:43,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399814051] [2022-03-03 19:08:43,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:43,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:08:43,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:08:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:08:43,935 INFO L87 Difference]: Start difference. First operand 369 states and 1135 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:44,461 INFO L93 Difference]: Finished difference Result 843 states and 2465 transitions. [2022-03-03 19:08:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:08:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:44,464 INFO L225 Difference]: With dead ends: 843 [2022-03-03 19:08:44,464 INFO L226 Difference]: Without dead ends: 698 [2022-03-03 19:08:44,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:08:44,465 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 273 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:44,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 167 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-03 19:08:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 378. [2022-03-03 19:08:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.1061007957559683) internal successors, (1171), 377 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1171 transitions. [2022-03-03 19:08:44,486 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1171 transitions. Word has length 20 [2022-03-03 19:08:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1171 transitions. [2022-03-03 19:08:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1171 transitions. [2022-03-03 19:08:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:44,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:44,487 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] [2022-03-03 19:08:44,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:08:44,703 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash -607204812, now seen corresponding path program 10 times [2022-03-03 19:08:44,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:44,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447595364] [2022-03-03 19:08:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:44,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:44,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447595364] [2022-03-03 19:08:44,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447595364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:44,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431462097] [2022-03-03 19:08:44,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:44,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:44,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:44,784 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) [2022-03-03 19:08:44,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:08:44,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:44,913 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 177 treesize of output 159 [2022-03-03 19:08:45,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:08:45,176 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 142 treesize of output 124 [2022-03-03 19:08:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:45,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:45,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 156 [2022-03-03 19:08:45,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 290 [2022-03-03 19:08:45,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:45,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 259 [2022-03-03 19:08:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:46,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431462097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:46,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:46,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:08:46,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481624343] [2022-03-03 19:08:46,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:46,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:08:46,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:08:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:08:46,376 INFO L87 Difference]: Start difference. First operand 378 states and 1171 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:46,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:46,703 INFO L93 Difference]: Finished difference Result 654 states and 1943 transitions. [2022-03-03 19:08:46,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:08:46,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:46,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:46,705 INFO L225 Difference]: With dead ends: 654 [2022-03-03 19:08:46,705 INFO L226 Difference]: Without dead ends: 534 [2022-03-03 19:08:46,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:08:46,705 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:46,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 154 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-03 19:08:46,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 369. [2022-03-03 19:08:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0842391304347827) internal successors, (1135), 368 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1135 transitions. [2022-03-03 19:08:46,711 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1135 transitions. Word has length 20 [2022-03-03 19:08:46,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:46,711 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1135 transitions. [2022-03-03 19:08:46,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1135 transitions. [2022-03-03 19:08:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:46,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:46,712 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] [2022-03-03 19:08:46,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:46,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:08:46,913 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:46,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1630065868, now seen corresponding path program 11 times [2022-03-03 19:08:46,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:46,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009119118] [2022-03-03 19:08:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:46,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:47,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:47,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009119118] [2022-03-03 19:08:47,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009119118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:47,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581810058] [2022-03-03 19:08:47,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:47,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:47,020 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) [2022-03-03 19:08:47,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:08:47,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:08:47,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:47,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-03 19:08:47,348 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 165 treesize of output 141 [2022-03-03 19:08:47,351 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 153 treesize of output 133 [2022-03-03 19:08:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:47,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:47,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-03-03 19:08:48,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:48,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 238 [2022-03-03 19:08:48,134 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 206 treesize of output 186 [2022-03-03 19:08:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:48,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581810058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:48,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:48,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:08:48,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666456966] [2022-03-03 19:08:48,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:48,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:08:48,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:08:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:08:48,272 INFO L87 Difference]: Start difference. First operand 369 states and 1135 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:48,394 INFO L93 Difference]: Finished difference Result 520 states and 1591 transitions. [2022-03-03 19:08:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:08:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:08:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:48,396 INFO L225 Difference]: With dead ends: 520 [2022-03-03 19:08:48,396 INFO L226 Difference]: Without dead ends: 481 [2022-03-03 19:08:48,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:08:48,396 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:48,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 84 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-03 19:08:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 376. [2022-03-03 19:08:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.0853333333333333) internal successors, (1157), 375 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1157 transitions. [2022-03-03 19:08:48,403 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1157 transitions. Word has length 20 [2022-03-03 19:08:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:48,403 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1157 transitions. [2022-03-03 19:08:48,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1157 transitions. [2022-03-03 19:08:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:48,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:48,404 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] [2022-03-03 19:08:48,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:48,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:48,620 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:48,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1489410784, now seen corresponding path program 12 times [2022-03-03 19:08:48,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:48,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562700360] [2022-03-03 19:08:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:48,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:48,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562700360] [2022-03-03 19:08:48,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562700360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:48,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154119664] [2022-03-03 19:08:48,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:08:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:48,745 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) [2022-03-03 19:08:48,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:08:48,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:08:48,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:48,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:08:48,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:48,873 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 173 treesize of output 149 [2022-03-03 19:08:49,103 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 229 treesize of output 191 [2022-03-03 19:08:49,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 194 [2022-03-03 19:08:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:49,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:49,687 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 244 treesize of output 208 [2022-03-03 19:08:50,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:50,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 208 [2022-03-03 19:08:50,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 171 [2022-03-03 19:08:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:50,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154119664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:50,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:50,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:08:50,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473716908] [2022-03-03 19:08:50,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:50,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:08:50,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:08:50,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:08:50,392 INFO L87 Difference]: Start difference. First operand 376 states and 1157 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:50,873 INFO L93 Difference]: Finished difference Result 974 states and 2755 transitions. [2022-03-03 19:08:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:08:50,873 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 [2022-03-03 19:08:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:50,877 INFO L225 Difference]: With dead ends: 974 [2022-03-03 19:08:50,877 INFO L226 Difference]: Without dead ends: 830 [2022-03-03 19:08:50,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:08:50,878 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 167 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:50,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 202 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:50,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-03 19:08:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 407. [2022-03-03 19:08:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1945812807881775) internal successors, (1297), 406 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1297 transitions. [2022-03-03 19:08:50,903 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1297 transitions. Word has length 20 [2022-03-03 19:08:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:50,903 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1297 transitions. [2022-03-03 19:08:50,903 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) [2022-03-03 19:08:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1297 transitions. [2022-03-03 19:08:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:08:50,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:50,904 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] [2022-03-03 19:08:50,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:51,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-03 19:08:51,120 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash 124155950, now seen corresponding path program 13 times [2022-03-03 19:08:51,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:51,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537005853] [2022-03-03 19:08:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:51,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:51,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537005853] [2022-03-03 19:08:51,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537005853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:51,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444317070] [2022-03-03 19:08:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:08:51,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:51,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:51,194 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) [2022-03-03 19:08:51,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:08:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:08:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:51,408 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 269 treesize of output 237 [2022-03-03 19:08:51,629 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 148 treesize of output 128 [2022-03-03 19:08:51,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 138 [2022-03-03 19:08:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:51,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:51,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 131 [2022-03-03 19:08:52,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 169 [2022-03-03 19:08:52,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:08:52,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 168 [2022-03-03 19:08:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:52,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444317070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:52,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:52,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:08:52,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531297361] [2022-03-03 19:08:52,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:52,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:08:52,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:08:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:08:52,507 INFO L87 Difference]: Start difference. First operand 407 states and 1297 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:52,715 INFO L93 Difference]: Finished difference Result 552 states and 1668 transitions. [2022-03-03 19:08:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:08:52,715 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 [2022-03-03 19:08:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:52,717 INFO L225 Difference]: With dead ends: 552 [2022-03-03 19:08:52,717 INFO L226 Difference]: Without dead ends: 432 [2022-03-03 19:08:52,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:08:52,717 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:52,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 109 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:08:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-03-03 19:08:52,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 407. [2022-03-03 19:08:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 3.1724137931034484) internal successors, (1288), 406 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:52,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1288 transitions. [2022-03-03 19:08:52,723 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1288 transitions. Word has length 20 [2022-03-03 19:08:52,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:52,723 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1288 transitions. [2022-03-03 19:08:52,723 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) [2022-03-03 19:08:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1288 transitions. [2022-03-03 19:08:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:08:52,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:52,724 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] [2022-03-03 19:08:52,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:52,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:52,935 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:52,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1803651538, now seen corresponding path program 14 times [2022-03-03 19:08:52,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:52,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861426902] [2022-03-03 19:08:52,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:52,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:53,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:53,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861426902] [2022-03-03 19:08:53,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861426902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:53,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923315467] [2022-03-03 19:08:53,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:08:53,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:53,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:53,085 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) [2022-03-03 19:08:53,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:08:53,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:08:53,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:53,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:08:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:53,137 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 17 treesize of output 13 [2022-03-03 19:08:53,206 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 22 treesize of output 16 [2022-03-03 19:08:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:53,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:53,329 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 164 treesize of output 144 [2022-03-03 19:08:53,553 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 3 treesize of output 1 [2022-03-03 19:08:53,557 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:08:53,557 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 8 treesize of output 7 [2022-03-03 19:08:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:53,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923315467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:53,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:53,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 17 [2022-03-03 19:08:53,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031475413] [2022-03-03 19:08:53,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:53,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:08:53,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:53,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:08:53,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:08:53,561 INFO L87 Difference]: Start difference. First operand 407 states and 1288 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:54,424 INFO L93 Difference]: Finished difference Result 851 states and 2578 transitions. [2022-03-03 19:08:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:08:54,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:08:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:54,428 INFO L225 Difference]: With dead ends: 851 [2022-03-03 19:08:54,428 INFO L226 Difference]: Without dead ends: 773 [2022-03-03 19:08:54,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:08:54,429 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:54,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 284 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:08:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-03-03 19:08:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 394. [2022-03-03 19:08:54,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 3.2111959287531806) internal successors, (1262), 393 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1262 transitions. [2022-03-03 19:08:54,435 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1262 transitions. Word has length 21 [2022-03-03 19:08:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:54,436 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1262 transitions. [2022-03-03 19:08:54,436 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) [2022-03-03 19:08:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1262 transitions. [2022-03-03 19:08:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:08:54,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:54,437 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] [2022-03-03 19:08:54,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:54,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:54,650 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1064525268, now seen corresponding path program 15 times [2022-03-03 19:08:54,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:54,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674007989] [2022-03-03 19:08:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:54,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:54,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:54,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674007989] [2022-03-03 19:08:54,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674007989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:54,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431666144] [2022-03-03 19:08:54,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:08:54,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:54,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:54,803 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) [2022-03-03 19:08:54,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:08:54,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:08:54,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:08:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:54,857 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 17 treesize of output 13 [2022-03-03 19:08:54,934 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 22 treesize of output 16 [2022-03-03 19:08:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:54,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:55,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 182 [2022-03-03 19:08:55,318 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 3 treesize of output 1 [2022-03-03 19:08:55,323 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:08:55,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:08:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:55,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431666144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:55,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:55,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-03 19:08:55,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465816730] [2022-03-03 19:08:55,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:55,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:08:55,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:55,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:08:55,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:08:55,325 INFO L87 Difference]: Start difference. First operand 394 states and 1262 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:56,066 INFO L93 Difference]: Finished difference Result 938 states and 2859 transitions. [2022-03-03 19:08:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:08:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:08:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:56,070 INFO L225 Difference]: With dead ends: 938 [2022-03-03 19:08:56,070 INFO L226 Difference]: Without dead ends: 852 [2022-03-03 19:08:56,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=340, Invalid=1300, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:08:56,071 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:56,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 315 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:08:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-03-03 19:08:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 404. [2022-03-03 19:08:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.228287841191067) internal successors, (1301), 403 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1301 transitions. [2022-03-03 19:08:56,078 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1301 transitions. Word has length 21 [2022-03-03 19:08:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:56,078 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1301 transitions. [2022-03-03 19:08:56,078 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) [2022-03-03 19:08:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1301 transitions. [2022-03-03 19:08:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:08:56,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:56,079 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] [2022-03-03 19:08:56,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-03 19:08:56,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-03 19:08:56,288 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 110965376, now seen corresponding path program 16 times [2022-03-03 19:08:56,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:56,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953134042] [2022-03-03 19:08:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:56,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:56,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953134042] [2022-03-03 19:08:56,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953134042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:56,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790737415] [2022-03-03 19:08:56,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:08:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:56,376 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) [2022-03-03 19:08:56,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:08:56,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:08:56,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:08:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:56,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:08:56,653 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 218 treesize of output 186 [2022-03-03 19:08:56,657 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 186 treesize of output 166 [2022-03-03 19:08:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:57,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:08:57,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:08:57,345 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:08:57,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:08:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:57,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790737415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:57,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:57,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-03 19:08:57,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437817324] [2022-03-03 19:08:57,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:57,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:08:57,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:08:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:08:57,349 INFO L87 Difference]: Start difference. First operand 404 states and 1301 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:08:57,626 INFO L93 Difference]: Finished difference Result 689 states and 2111 transitions. [2022-03-03 19:08:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:08:57,626 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 [2022-03-03 19:08:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:08:57,628 INFO L225 Difference]: With dead ends: 689 [2022-03-03 19:08:57,628 INFO L226 Difference]: Without dead ends: 638 [2022-03-03 19:08:57,629 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 [2022-03-03 19:08:57,629 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 120 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:08:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 121 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:08:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-03-03 19:08:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 414. [2022-03-03 19:08:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.2687651331719128) internal successors, (1350), 413 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:08:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1350 transitions. [2022-03-03 19:08:57,635 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1350 transitions. Word has length 21 [2022-03-03 19:08:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:08:57,638 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1350 transitions. [2022-03-03 19:08:57,638 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) [2022-03-03 19:08:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1350 transitions. [2022-03-03 19:08:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:08:57,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:08:57,639 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] [2022-03-03 19:08:57,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:08:57,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:57,840 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:08:57,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:08:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1724532110, now seen corresponding path program 17 times [2022-03-03 19:08:57,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:08:57,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907319455] [2022-03-03 19:08:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:08:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:08:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:08:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:08:57,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:08:57,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907319455] [2022-03-03 19:08:57,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907319455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:08:57,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708701567] [2022-03-03 19:08:57,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:08:57,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:08:57,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:08:57,976 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) [2022-03-03 19:08:57,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:08:58,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:08:58,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:08:58,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:08:58,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:08:58,032 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 17 treesize of output 13 [2022-03-03 19:08:58,102 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 145 treesize of output 125 [2022-03-03 19:08:58,120 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 135 treesize of output 117 [2022-03-03 19:08:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:58,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:08:58,541 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 329 treesize of output 285 [2022-03-03 19:08:58,807 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 3 treesize of output 1 [2022-03-03 19:08:58,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:08:58,812 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 [2022-03-03 19:08:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:08:58,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708701567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:08:58,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:08:58,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-03 19:08:58,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003475029] [2022-03-03 19:08:58,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:08:58,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:08:58,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:08:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:08:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:08:58,816 INFO L87 Difference]: Start difference. First operand 414 states and 1350 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:00,034 INFO L93 Difference]: Finished difference Result 1007 states and 2958 transitions. [2022-03-03 19:09:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:09:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:00,036 INFO L225 Difference]: With dead ends: 1007 [2022-03-03 19:09:00,036 INFO L226 Difference]: Without dead ends: 812 [2022-03-03 19:09:00,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=537, Invalid=2219, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:09:00,037 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:00,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 306 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-03 19:09:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 422. [2022-03-03 19:09:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.2066508313539193) internal successors, (1350), 421 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1350 transitions. [2022-03-03 19:09:00,045 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1350 transitions. Word has length 21 [2022-03-03 19:09:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:00,046 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1350 transitions. [2022-03-03 19:09:00,046 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) [2022-03-03 19:09:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1350 transitions. [2022-03-03 19:09:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:00,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:00,047 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] [2022-03-03 19:09:00,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:09:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:00,268 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash 763550390, now seen corresponding path program 18 times [2022-03-03 19:09:00,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:00,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656522723] [2022-03-03 19:09:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:00,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:00,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:00,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656522723] [2022-03-03 19:09:00,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656522723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:00,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963746724] [2022-03-03 19:09:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:00,484 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) [2022-03-03 19:09:00,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:09:00,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:09:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:00,620 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 177 treesize of output 153 [2022-03-03 19:09:00,768 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 20 treesize of output 16 [2022-03-03 19:09:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:00,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:01,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 284 [2022-03-03 19:09:01,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:01,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 265 [2022-03-03 19:09:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:01,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963746724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:01,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:01,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-03 19:09:01,371 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34290003] [2022-03-03 19:09:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:01,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:09:01,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:09:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:09:01,372 INFO L87 Difference]: Start difference. First operand 422 states and 1350 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:02,276 INFO L93 Difference]: Finished difference Result 1091 states and 3208 transitions. [2022-03-03 19:09:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:09:02,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:02,280 INFO L225 Difference]: With dead ends: 1091 [2022-03-03 19:09:02,280 INFO L226 Difference]: Without dead ends: 842 [2022-03-03 19:09:02,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=454, Invalid=1802, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:09:02,282 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 294 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:02,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 283 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-03-03 19:09:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 495. [2022-03-03 19:09:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.133603238866397) internal successors, (1548), 494 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1548 transitions. [2022-03-03 19:09:02,290 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1548 transitions. Word has length 21 [2022-03-03 19:09:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:02,290 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1548 transitions. [2022-03-03 19:09:02,290 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) [2022-03-03 19:09:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1548 transitions. [2022-03-03 19:09:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:02,305 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:02,305 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] [2022-03-03 19:09:02,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:02,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:02,521 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash -76145436, now seen corresponding path program 19 times [2022-03-03 19:09:02,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:02,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524647858] [2022-03-03 19:09:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:02,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:02,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:02,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524647858] [2022-03-03 19:09:02,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524647858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:02,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260379126] [2022-03-03 19:09:02,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:02,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:02,610 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) [2022-03-03 19:09:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:09:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:02,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:02,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:02,773 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 24 treesize of output 18 [2022-03-03 19:09:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:02,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:02,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 173 [2022-03-03 19:09:03,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:03,092 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 20 treesize of output 24 [2022-03-03 19:09:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:03,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260379126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:03,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:03,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:09:03,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496355381] [2022-03-03 19:09:03,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:03,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:09:03,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:09:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:03,124 INFO L87 Difference]: Start difference. First operand 495 states and 1548 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:03,294 INFO L93 Difference]: Finished difference Result 705 states and 2177 transitions. [2022-03-03 19:09:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:09:03,295 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 [2022-03-03 19:09:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:03,296 INFO L225 Difference]: With dead ends: 705 [2022-03-03 19:09:03,296 INFO L226 Difference]: Without dead ends: 653 [2022-03-03 19:09:03,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:09:03,297 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 126 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:03,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 116 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-03 19:09:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 539. [2022-03-03 19:09:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.1617100371747213) internal successors, (1701), 538 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1701 transitions. [2022-03-03 19:09:03,305 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1701 transitions. Word has length 21 [2022-03-03 19:09:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:03,305 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1701 transitions. [2022-03-03 19:09:03,305 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) [2022-03-03 19:09:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1701 transitions. [2022-03-03 19:09:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:03,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:03,306 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] [2022-03-03 19:09:03,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:03,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:09:03,522 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:03,523 INFO L85 PathProgramCache]: Analyzing trace with hash 266104058, now seen corresponding path program 20 times [2022-03-03 19:09:03,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:03,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159875715] [2022-03-03 19:09:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:03,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:03,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:03,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159875715] [2022-03-03 19:09:03,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159875715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:03,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784089681] [2022-03-03 19:09:03,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:03,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:03,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:03,614 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) [2022-03-03 19:09:03,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:09:03,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:03,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 129 [2022-03-03 19:09:03,749 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 129 treesize of output 113 [2022-03-03 19:09:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:03,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:04,094 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 280 treesize of output 252 [2022-03-03 19:09:04,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:04,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:04,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784089681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:04,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:04,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:09:04,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926738749] [2022-03-03 19:09:04,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:04,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:09:04,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:09:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:04,375 INFO L87 Difference]: Start difference. First operand 539 states and 1701 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:04,765 INFO L93 Difference]: Finished difference Result 809 states and 2493 transitions. [2022-03-03 19:09:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:09:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:04,766 INFO L225 Difference]: With dead ends: 809 [2022-03-03 19:09:04,766 INFO L226 Difference]: Without dead ends: 742 [2022-03-03 19:09:04,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:09:04,767 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:04,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-03-03 19:09:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 567. [2022-03-03 19:09:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.234982332155477) internal successors, (1831), 566 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1831 transitions. [2022-03-03 19:09:04,775 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1831 transitions. Word has length 21 [2022-03-03 19:09:04,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:04,776 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1831 transitions. [2022-03-03 19:09:04,777 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) [2022-03-03 19:09:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1831 transitions. [2022-03-03 19:09:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:04,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:04,778 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] [2022-03-03 19:09:04,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:04,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:09:04,991 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:04,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1940063640, now seen corresponding path program 21 times [2022-03-03 19:09:04,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:04,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380752442] [2022-03-03 19:09:04,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:05,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:05,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380752442] [2022-03-03 19:09:05,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380752442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:05,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366798422] [2022-03-03 19:09:05,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:05,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:05,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:05,120 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) [2022-03-03 19:09:05,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:09:05,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:09:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:05,288 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 151 treesize of output 129 [2022-03-03 19:09:05,290 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 129 treesize of output 113 [2022-03-03 19:09:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:05,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:05,669 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 244 treesize of output 216 [2022-03-03 19:09:05,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:05,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:05,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366798422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:05,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:05,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-03 19:09:05,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311800809] [2022-03-03 19:09:05,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:05,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:09:05,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:09:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:09:05,940 INFO L87 Difference]: Start difference. First operand 567 states and 1831 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:06,594 INFO L93 Difference]: Finished difference Result 933 states and 2786 transitions. [2022-03-03 19:09:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:09:06,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:06,596 INFO L225 Difference]: With dead ends: 933 [2022-03-03 19:09:06,596 INFO L226 Difference]: Without dead ends: 881 [2022-03-03 19:09:06,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:09:06,598 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:06,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 249 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-03-03 19:09:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 545. [2022-03-03 19:09:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.198529411764706) internal successors, (1740), 544 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:06,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1740 transitions. [2022-03-03 19:09:06,623 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1740 transitions. Word has length 21 [2022-03-03 19:09:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:06,623 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1740 transitions. [2022-03-03 19:09:06,623 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) [2022-03-03 19:09:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1740 transitions. [2022-03-03 19:09:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:06,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:06,624 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] [2022-03-03 19:09:06,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:06,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:09:06,825 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:06,825 INFO L85 PathProgramCache]: Analyzing trace with hash 64137700, now seen corresponding path program 22 times [2022-03-03 19:09:06,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:06,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068657068] [2022-03-03 19:09:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:06,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:06,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:06,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068657068] [2022-03-03 19:09:06,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068657068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:06,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438318192] [2022-03-03 19:09:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:06,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:06,931 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) [2022-03-03 19:09:06,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:09:06,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:06,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:06,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:07,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-03-03 19:09:07,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:09:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:07,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:07,505 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 280 treesize of output 252 [2022-03-03 19:09:07,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:07,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 221 [2022-03-03 19:09:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:07,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438318192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:07,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:07,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-03-03 19:09:07,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649486019] [2022-03-03 19:09:07,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:07,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:09:07,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:07,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:09:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:09:07,770 INFO L87 Difference]: Start difference. First operand 545 states and 1740 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:08,069 INFO L93 Difference]: Finished difference Result 794 states and 2413 transitions. [2022-03-03 19:09:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:09:08,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:08,070 INFO L225 Difference]: With dead ends: 794 [2022-03-03 19:09:08,070 INFO L226 Difference]: Without dead ends: 706 [2022-03-03 19:09:08,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:09:08,071 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:08,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 149 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-03 19:09:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 556. [2022-03-03 19:09:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.218018018018018) internal successors, (1786), 555 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1786 transitions. [2022-03-03 19:09:08,078 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1786 transitions. Word has length 21 [2022-03-03 19:09:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:08,079 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1786 transitions. [2022-03-03 19:09:08,079 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) [2022-03-03 19:09:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1786 transitions. [2022-03-03 19:09:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:08,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:08,080 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] [2022-03-03 19:09:08,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:08,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:08,290 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash 417277190, now seen corresponding path program 23 times [2022-03-03 19:09:08,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:08,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380874896] [2022-03-03 19:09:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:08,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:08,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:08,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380874896] [2022-03-03 19:09:08,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380874896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:08,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047180286] [2022-03-03 19:09:08,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:08,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:08,416 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) [2022-03-03 19:09:08,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:09:08,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:08,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:08,569 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 165 treesize of output 147 [2022-03-03 19:09:08,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-03 19:09:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:08,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:08,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:08,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 173 [2022-03-03 19:09:08,912 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 168 treesize of output 148 [2022-03-03 19:09:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:09,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047180286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:09,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:09,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:09:09,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220664288] [2022-03-03 19:09:09,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:09,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:09:09,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:09:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:09,059 INFO L87 Difference]: Start difference. First operand 556 states and 1786 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:09,479 INFO L93 Difference]: Finished difference Result 929 states and 2821 transitions. [2022-03-03 19:09:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:09:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:09,481 INFO L225 Difference]: With dead ends: 929 [2022-03-03 19:09:09,481 INFO L226 Difference]: Without dead ends: 862 [2022-03-03 19:09:09,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:09:09,481 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:09,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 171 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-03-03 19:09:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 586. [2022-03-03 19:09:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.2786324786324785) internal successors, (1918), 585 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1918 transitions. [2022-03-03 19:09:09,497 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1918 transitions. Word has length 21 [2022-03-03 19:09:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:09,497 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1918 transitions. [2022-03-03 19:09:09,497 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) [2022-03-03 19:09:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1918 transitions. [2022-03-03 19:09:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:09,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:09,498 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] [2022-03-03 19:09:09,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:09:09,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:09,711 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2091236772, now seen corresponding path program 24 times [2022-03-03 19:09:09,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:09,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348759201] [2022-03-03 19:09:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:09,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:09,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:09,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348759201] [2022-03-03 19:09:09,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348759201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:09,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85055617] [2022-03-03 19:09:09,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:09,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:09,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:09,819 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) [2022-03-03 19:09:09,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:09:09,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:09:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:09,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:09,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:10,132 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 29 treesize of output 23 [2022-03-03 19:09:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:10,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:10,389 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 211 treesize of output 187 [2022-03-03 19:09:10,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:10,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 180 [2022-03-03 19:09:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:10,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85055617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:10,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:10,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-03 19:09:10,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919695398] [2022-03-03 19:09:10,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:10,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:09:10,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:09:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:10,746 INFO L87 Difference]: Start difference. First operand 586 states and 1918 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:11,000 INFO L93 Difference]: Finished difference Result 802 states and 2476 transitions. [2022-03-03 19:09:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:09:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:11,002 INFO L225 Difference]: With dead ends: 802 [2022-03-03 19:09:11,002 INFO L226 Difference]: Without dead ends: 750 [2022-03-03 19:09:11,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:09:11,002 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:11,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 132 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-03-03 19:09:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 546. [2022-03-03 19:09:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 3.2091743119266054) internal successors, (1749), 545 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1749 transitions. [2022-03-03 19:09:11,010 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1749 transitions. Word has length 21 [2022-03-03 19:09:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:11,010 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 1749 transitions. [2022-03-03 19:09:11,010 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) [2022-03-03 19:09:11,010 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1749 transitions. [2022-03-03 19:09:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:11,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:11,013 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] [2022-03-03 19:09:11,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:11,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 19:09:11,228 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1916574138, now seen corresponding path program 25 times [2022-03-03 19:09:11,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:11,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069550896] [2022-03-03 19:09:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:11,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:11,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:11,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069550896] [2022-03-03 19:09:11,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069550896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:11,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297778217] [2022-03-03 19:09:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:11,331 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) [2022-03-03 19:09:11,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:09:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:11,497 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 173 treesize of output 149 [2022-03-03 19:09:11,700 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 37 treesize of output 29 [2022-03-03 19:09:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:11,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:12,081 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 317 treesize of output 277 [2022-03-03 19:09:12,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:12,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 250 [2022-03-03 19:09:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:12,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297778217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:12,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:12,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-03-03 19:09:12,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639140977] [2022-03-03 19:09:12,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:12,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:12,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:12,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:12,399 INFO L87 Difference]: Start difference. First operand 546 states and 1749 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:12,930 INFO L93 Difference]: Finished difference Result 1185 states and 3570 transitions. [2022-03-03 19:09:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:09:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:12,932 INFO L225 Difference]: With dead ends: 1185 [2022-03-03 19:09:12,932 INFO L226 Difference]: Without dead ends: 1118 [2022-03-03 19:09:12,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:09:12,933 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 217 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:12,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 182 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:12,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-03 19:09:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 588. [2022-03-03 19:09:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.2964224872231687) internal successors, (1935), 587 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1935 transitions. [2022-03-03 19:09:12,943 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1935 transitions. Word has length 21 [2022-03-03 19:09:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:12,943 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1935 transitions. [2022-03-03 19:09:12,943 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) [2022-03-03 19:09:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1935 transitions. [2022-03-03 19:09:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:12,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:12,944 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] [2022-03-03 19:09:12,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:13,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-03 19:09:13,147 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:13,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash -704433576, now seen corresponding path program 26 times [2022-03-03 19:09:13,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:13,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504772029] [2022-03-03 19:09:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:13,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:13,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504772029] [2022-03-03 19:09:13,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504772029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:13,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287589074] [2022-03-03 19:09:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:13,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:13,325 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) [2022-03-03 19:09:13,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:09:13,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:13,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:13,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 231 [2022-03-03 19:09:13,682 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 30 treesize of output 24 [2022-03-03 19:09:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:13,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:13,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:13,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:13,934 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 173 treesize of output 153 [2022-03-03 19:09:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:14,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287589074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:14,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:14,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-03-03 19:09:14,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877770599] [2022-03-03 19:09:14,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:14,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:09:14,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:09:14,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:09:14,168 INFO L87 Difference]: Start difference. First operand 588 states and 1935 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:14,835 INFO L93 Difference]: Finished difference Result 1175 states and 3546 transitions. [2022-03-03 19:09:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:09:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:14,837 INFO L225 Difference]: With dead ends: 1175 [2022-03-03 19:09:14,837 INFO L226 Difference]: Without dead ends: 1087 [2022-03-03 19:09:14,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:09:14,838 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 222 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:14,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 229 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-03-03 19:09:14,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 541. [2022-03-03 19:09:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 3.238888888888889) internal successors, (1749), 540 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1749 transitions. [2022-03-03 19:09:14,847 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1749 transitions. Word has length 21 [2022-03-03 19:09:14,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:14,847 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1749 transitions. [2022-03-03 19:09:14,847 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) [2022-03-03 19:09:14,847 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1749 transitions. [2022-03-03 19:09:14,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:14,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:14,848 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] [2022-03-03 19:09:14,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:15,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:15,064 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:15,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1854422378, now seen corresponding path program 27 times [2022-03-03 19:09:15,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:15,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511523418] [2022-03-03 19:09:15,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:15,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:15,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511523418] [2022-03-03 19:09:15,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511523418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:15,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409054938] [2022-03-03 19:09:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:15,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:15,154 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) [2022-03-03 19:09:15,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:09:15,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:09:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:15,321 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 217 treesize of output 189 [2022-03-03 19:09:15,487 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 20 treesize of output 16 [2022-03-03 19:09:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:15,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:15,677 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 244 treesize of output 216 [2022-03-03 19:09:15,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:15,683 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 223 treesize of output 193 [2022-03-03 19:09:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:15,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409054938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:15,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:15,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:09:15,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619446264] [2022-03-03 19:09:15,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:15,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:15,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:15,912 INFO L87 Difference]: Start difference. First operand 541 states and 1749 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:16,157 INFO L93 Difference]: Finished difference Result 872 states and 2663 transitions. [2022-03-03 19:09:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:09:16,158 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 [2022-03-03 19:09:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:16,159 INFO L225 Difference]: With dead ends: 872 [2022-03-03 19:09:16,159 INFO L226 Difference]: Without dead ends: 792 [2022-03-03 19:09:16,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:16,160 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:16,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 119 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-03 19:09:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 493. [2022-03-03 19:09:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.1930894308943087) internal successors, (1571), 492 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1571 transitions. [2022-03-03 19:09:16,167 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1571 transitions. Word has length 21 [2022-03-03 19:09:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:16,167 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1571 transitions. [2022-03-03 19:09:16,167 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) [2022-03-03 19:09:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1571 transitions. [2022-03-03 19:09:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:16,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:16,168 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] [2022-03-03 19:09:16,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:16,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:16,383 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 216306962, now seen corresponding path program 28 times [2022-03-03 19:09:16,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:16,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449993988] [2022-03-03 19:09:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:16,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:16,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449993988] [2022-03-03 19:09:16,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449993988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:16,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871905254] [2022-03-03 19:09:16,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:16,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:16,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:16,500 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) [2022-03-03 19:09:16,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:09:16,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:16,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:16,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:09:16,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:09:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:16,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:16,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-03-03 19:09:17,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:17,202 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:09:17,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:09:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:17,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871905254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:17,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:17,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-03 19:09:17,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491759034] [2022-03-03 19:09:17,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:17,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:17,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:17,258 INFO L87 Difference]: Start difference. First operand 493 states and 1571 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:17,459 INFO L93 Difference]: Finished difference Result 698 states and 2178 transitions. [2022-03-03 19:09:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:17,459 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 [2022-03-03 19:09:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:17,460 INFO L225 Difference]: With dead ends: 698 [2022-03-03 19:09:17,460 INFO L226 Difference]: Without dead ends: 637 [2022-03-03 19:09:17,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:17,461 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:17,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 98 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-03-03 19:09:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 507. [2022-03-03 19:09:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 3.205533596837945) internal successors, (1622), 506 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1622 transitions. [2022-03-03 19:09:17,480 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1622 transitions. Word has length 21 [2022-03-03 19:09:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:17,480 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1622 transitions. [2022-03-03 19:09:17,480 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) [2022-03-03 19:09:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1622 transitions. [2022-03-03 19:09:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:17,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:17,481 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] [2022-03-03 19:09:17,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:17,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:17,681 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:17,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1391797606, now seen corresponding path program 29 times [2022-03-03 19:09:17,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:17,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553231870] [2022-03-03 19:09:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:17,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:17,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:17,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553231870] [2022-03-03 19:09:17,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553231870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:17,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305779656] [2022-03-03 19:09:17,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:17,770 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) [2022-03-03 19:09:17,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:09:17,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:09:17,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:17,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:17,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:17,862 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 17 treesize of output 13 [2022-03-03 19:09:18,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:18,009 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 222 treesize of output 190 [2022-03-03 19:09:18,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 170 [2022-03-03 19:09:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:18,354 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 197 treesize of output 177 [2022-03-03 19:09:18,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:18,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:09:18,574 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 3 treesize of output 1 [2022-03-03 19:09:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:18,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305779656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:18,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:18,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-03 19:09:18,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320142226] [2022-03-03 19:09:18,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:18,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:09:18,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:09:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:09:18,612 INFO L87 Difference]: Start difference. First operand 507 states and 1622 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:18,821 INFO L93 Difference]: Finished difference Result 736 states and 2283 transitions. [2022-03-03 19:09:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:18,821 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 [2022-03-03 19:09:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:18,822 INFO L225 Difference]: With dead ends: 736 [2022-03-03 19:09:18,823 INFO L226 Difference]: Without dead ends: 684 [2022-03-03 19:09:18,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:09:18,823 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:18,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 117 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 350 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-03-03 19:09:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-03 19:09:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 527. [2022-03-03 19:09:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.2395437262357416) internal successors, (1704), 526 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1704 transitions. [2022-03-03 19:09:18,832 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1704 transitions. Word has length 21 [2022-03-03 19:09:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:18,832 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1704 transitions. [2022-03-03 19:09:18,832 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) [2022-03-03 19:09:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1704 transitions. [2022-03-03 19:09:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:18,833 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:18,833 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] [2022-03-03 19:09:18,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 19:09:19,047 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1289602956, now seen corresponding path program 30 times [2022-03-03 19:09:19,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:19,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437592813] [2022-03-03 19:09:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:19,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:19,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437592813] [2022-03-03 19:09:19,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437592813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:19,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827264973] [2022-03-03 19:09:19,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:19,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:19,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:19,161 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) [2022-03-03 19:09:19,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:09:19,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:09:19,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:19,249 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 17 treesize of output 13 [2022-03-03 19:09:19,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:19,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 239 [2022-03-03 19:09:19,442 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 239 treesize of output 209 [2022-03-03 19:09:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:19,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:19,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:20,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:20,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:20,126 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 3 treesize of output 1 [2022-03-03 19:09:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:20,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827264973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:20,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:20,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-03-03 19:09:20,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553404930] [2022-03-03 19:09:20,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:20,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:09:20,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:09:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:09:20,150 INFO L87 Difference]: Start difference. First operand 527 states and 1704 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:20,898 INFO L93 Difference]: Finished difference Result 848 states and 2576 transitions. [2022-03-03 19:09:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:09:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:20,900 INFO L225 Difference]: With dead ends: 848 [2022-03-03 19:09:20,900 INFO L226 Difference]: Without dead ends: 668 [2022-03-03 19:09:20,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:09:20,900 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:20,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 258 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 627 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-03-03 19:09:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-03 19:09:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 528. [2022-03-03 19:09:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.2485768500948766) internal successors, (1712), 527 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:20,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1712 transitions. [2022-03-03 19:09:20,907 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1712 transitions. Word has length 21 [2022-03-03 19:09:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:20,908 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1712 transitions. [2022-03-03 19:09:20,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:20,908 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1712 transitions. [2022-03-03 19:09:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:20,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:20,908 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] [2022-03-03 19:09:20,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:21,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-03 19:09:21,109 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash -822698094, now seen corresponding path program 31 times [2022-03-03 19:09:21,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:21,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301541250] [2022-03-03 19:09:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:21,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:21,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:21,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301541250] [2022-03-03 19:09:21,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301541250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:21,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906235506] [2022-03-03 19:09:21,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:21,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:21,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:21,188 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) [2022-03-03 19:09:21,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:09:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:21,398 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 277 treesize of output 245 [2022-03-03 19:09:21,594 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 17 treesize of output 13 [2022-03-03 19:09:21,596 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 41 treesize of output 33 [2022-03-03 19:09:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:21,744 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 3 treesize of output 1 [2022-03-03 19:09:21,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:21,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 187 [2022-03-03 19:09:21,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 162 [2022-03-03 19:09:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:22,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906235506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:22,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:22,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-03 19:09:22,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180742699] [2022-03-03 19:09:22,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:22,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:09:22,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:09:22,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:09:22,147 INFO L87 Difference]: Start difference. First operand 528 states and 1712 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:22,374 INFO L93 Difference]: Finished difference Result 756 states and 2364 transitions. [2022-03-03 19:09:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:09:22,374 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 [2022-03-03 19:09:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:22,376 INFO L225 Difference]: With dead ends: 756 [2022-03-03 19:09:22,376 INFO L226 Difference]: Without dead ends: 704 [2022-03-03 19:09:22,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:09:22,376 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 111 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:22,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 101 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-03 19:09:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 534. [2022-03-03 19:09:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.2664165103189493) internal successors, (1741), 533 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1741 transitions. [2022-03-03 19:09:22,384 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1741 transitions. Word has length 21 [2022-03-03 19:09:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:22,384 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1741 transitions. [2022-03-03 19:09:22,384 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) [2022-03-03 19:09:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1741 transitions. [2022-03-03 19:09:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:22,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:22,385 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] [2022-03-03 19:09:22,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-03 19:09:22,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-03 19:09:22,599 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash 790868640, now seen corresponding path program 32 times [2022-03-03 19:09:22,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:22,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705921012] [2022-03-03 19:09:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:22,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:22,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:22,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705921012] [2022-03-03 19:09:22,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705921012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:22,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769649150] [2022-03-03 19:09:22,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:22,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:22,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:22,674 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) [2022-03-03 19:09:22,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:09:22,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:22,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:22,790 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 153 treesize of output 133 [2022-03-03 19:09:22,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-03 19:09:22,941 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 17 treesize of output 13 [2022-03-03 19:09:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:23,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:23,062 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 3 treesize of output 1 [2022-03-03 19:09:23,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:23,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 219 [2022-03-03 19:09:23,234 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 214 treesize of output 190 [2022-03-03 19:09:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:23,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769649150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:23,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:23,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-03 19:09:23,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481731349] [2022-03-03 19:09:23,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:23,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:23,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:23,512 INFO L87 Difference]: Start difference. First operand 534 states and 1741 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:23,703 INFO L93 Difference]: Finished difference Result 749 states and 2303 transitions. [2022-03-03 19:09:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:23,704 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 [2022-03-03 19:09:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:23,705 INFO L225 Difference]: With dead ends: 749 [2022-03-03 19:09:23,705 INFO L226 Difference]: Without dead ends: 694 [2022-03-03 19:09:23,705 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 [2022-03-03 19:09:23,710 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:23,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-03 19:09:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 530. [2022-03-03 19:09:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.2457466918714557) internal successors, (1717), 529 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1717 transitions. [2022-03-03 19:09:23,717 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1717 transitions. Word has length 21 [2022-03-03 19:09:23,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:23,717 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1717 transitions. [2022-03-03 19:09:23,717 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) [2022-03-03 19:09:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1717 transitions. [2022-03-03 19:09:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:23,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:23,720 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] [2022-03-03 19:09:23,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:23,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-03 19:09:23,924 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash -728170158, now seen corresponding path program 33 times [2022-03-03 19:09:23,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:23,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480695248] [2022-03-03 19:09:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:23,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:24,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:24,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480695248] [2022-03-03 19:09:24,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480695248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:24,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758379547] [2022-03-03 19:09:24,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:24,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:24,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:24,031 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) [2022-03-03 19:09:24,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:09:24,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:09:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:24,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:24,257 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 270 treesize of output 236 [2022-03-03 19:09:24,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-03 19:09:24,554 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 17 treesize of output 13 [2022-03-03 19:09:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:24,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:24,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:24,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:24,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 187 [2022-03-03 19:09:24,781 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 182 treesize of output 162 [2022-03-03 19:09:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:25,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758379547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:25,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:25,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-03 19:09:25,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396488091] [2022-03-03 19:09:25,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:25,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:09:25,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:09:25,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:09:25,165 INFO L87 Difference]: Start difference. First operand 530 states and 1717 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:25,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:25,426 INFO L93 Difference]: Finished difference Result 650 states and 2036 transitions. [2022-03-03 19:09:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:09:25,427 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 [2022-03-03 19:09:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:25,428 INFO L225 Difference]: With dead ends: 650 [2022-03-03 19:09:25,428 INFO L226 Difference]: Without dead ends: 577 [2022-03-03 19:09:25,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:25,429 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:25,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 110 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-03-03 19:09:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 512. [2022-03-03 19:09:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 3.2407045009784734) internal successors, (1656), 511 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1656 transitions. [2022-03-03 19:09:25,435 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1656 transitions. Word has length 21 [2022-03-03 19:09:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:25,435 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1656 transitions. [2022-03-03 19:09:25,435 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) [2022-03-03 19:09:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1656 transitions. [2022-03-03 19:09:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:25,436 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:25,436 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] [2022-03-03 19:09:25,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-03 19:09:25,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:25,647 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 108651494, now seen corresponding path program 34 times [2022-03-03 19:09:25,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:25,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192737246] [2022-03-03 19:09:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:25,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:25,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192737246] [2022-03-03 19:09:25,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192737246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:25,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867804135] [2022-03-03 19:09:25,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:25,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:25,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:25,752 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) [2022-03-03 19:09:25,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:09:25,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:25,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:25,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:25,851 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 17 treesize of output 13 [2022-03-03 19:09:26,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 237 [2022-03-03 19:09:26,041 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 237 treesize of output 205 [2022-03-03 19:09:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:26,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:26,379 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 164 treesize of output 144 [2022-03-03 19:09:26,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:26,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:09:26,643 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 [2022-03-03 19:09:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:26,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867804135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:26,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:26,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-03 19:09:26,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521713096] [2022-03-03 19:09:26,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:26,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:09:26,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:09:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:09:26,665 INFO L87 Difference]: Start difference. First operand 512 states and 1656 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:26,836 INFO L93 Difference]: Finished difference Result 737 states and 2299 transitions. [2022-03-03 19:09:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:26,851 INFO L225 Difference]: With dead ends: 737 [2022-03-03 19:09:26,851 INFO L226 Difference]: Without dead ends: 693 [2022-03-03 19:09:26,851 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 [2022-03-03 19:09:26,866 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:26,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 129 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-03-03 19:09:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 513. [2022-03-03 19:09:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.24609375) internal successors, (1662), 512 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1662 transitions. [2022-03-03 19:09:26,874 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1662 transitions. Word has length 21 [2022-03-03 19:09:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:26,874 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1662 transitions. [2022-03-03 19:09:26,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1662 transitions. [2022-03-03 19:09:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:26,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:26,875 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] [2022-03-03 19:09:26,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:09:27,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-03 19:09:27,091 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1722218228, now seen corresponding path program 35 times [2022-03-03 19:09:27,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:27,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145857915] [2022-03-03 19:09:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:27,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:27,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145857915] [2022-03-03 19:09:27,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145857915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:27,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577846685] [2022-03-03 19:09:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:27,172 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) [2022-03-03 19:09:27,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:09:27,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:27,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:27,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:27,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:27,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 151 [2022-03-03 19:09:27,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 133 [2022-03-03 19:09:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:27,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:27,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:28,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:28,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:28,024 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 3 treesize of output 1 [2022-03-03 19:09:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:28,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577846685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:28,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:28,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-03 19:09:28,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181014077] [2022-03-03 19:09:28,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:28,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:28,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:28,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:28,048 INFO L87 Difference]: Start difference. First operand 513 states and 1662 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:28,210 INFO L93 Difference]: Finished difference Result 653 states and 2037 transitions. [2022-03-03 19:09:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:09:28,210 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 [2022-03-03 19:09:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:28,224 INFO L225 Difference]: With dead ends: 653 [2022-03-03 19:09:28,224 INFO L226 Difference]: Without dead ends: 606 [2022-03-03 19:09:28,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:28,225 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:28,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 122 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-03-03 19:09:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 482. [2022-03-03 19:09:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.191268191268191) internal successors, (1535), 481 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1535 transitions. [2022-03-03 19:09:28,231 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1535 transitions. Word has length 21 [2022-03-03 19:09:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:28,231 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1535 transitions. [2022-03-03 19:09:28,231 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) [2022-03-03 19:09:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1535 transitions. [2022-03-03 19:09:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:28,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:28,246 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] [2022-03-03 19:09:28,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:28,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:28,462 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:28,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2061815264, now seen corresponding path program 36 times [2022-03-03 19:09:28,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:28,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62744220] [2022-03-03 19:09:28,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:28,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:28,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:28,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62744220] [2022-03-03 19:09:28,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62744220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:28,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893283671] [2022-03-03 19:09:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:28,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:28,618 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) [2022-03-03 19:09:28,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:09:28,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:09:28,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:28,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:28,766 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 145 treesize of output 129 [2022-03-03 19:09:28,940 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 29 treesize of output 23 [2022-03-03 19:09:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:29,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:29,255 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 252 treesize of output 224 [2022-03-03 19:09:29,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:29,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 213 [2022-03-03 19:09:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:29,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893283671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:29,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:29,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-03 19:09:29,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811442619] [2022-03-03 19:09:29,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:29,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:09:29,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:09:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:29,495 INFO L87 Difference]: Start difference. First operand 482 states and 1535 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:30,413 INFO L93 Difference]: Finished difference Result 1121 states and 3394 transitions. [2022-03-03 19:09:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:09:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:30,415 INFO L225 Difference]: With dead ends: 1121 [2022-03-03 19:09:30,415 INFO L226 Difference]: Without dead ends: 970 [2022-03-03 19:09:30,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:09:30,416 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 205 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:30,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 330 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:09:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-03-03 19:09:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 515. [2022-03-03 19:09:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.2392996108949417) internal successors, (1665), 514 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1665 transitions. [2022-03-03 19:09:30,424 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1665 transitions. Word has length 21 [2022-03-03 19:09:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:30,424 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1665 transitions. [2022-03-03 19:09:30,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1665 transitions. [2022-03-03 19:09:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:30,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:30,425 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] [2022-03-03 19:09:30,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:30,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:30,626 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 921136774, now seen corresponding path program 37 times [2022-03-03 19:09:30,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:30,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857593498] [2022-03-03 19:09:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:30,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:30,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:30,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857593498] [2022-03-03 19:09:30,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857593498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:30,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265617815] [2022-03-03 19:09:30,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:30,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:30,704 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) [2022-03-03 19:09:30,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:09:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:30,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:30,790 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 17 treesize of output 13 [2022-03-03 19:09:30,878 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 22 treesize of output 16 [2022-03-03 19:09:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:30,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:31,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 296 [2022-03-03 19:09:31,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:31,461 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:09:31,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:31,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265617815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:31,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:31,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-03 19:09:31,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924781475] [2022-03-03 19:09:31,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:31,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:09:31,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:09:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:09:31,504 INFO L87 Difference]: Start difference. First operand 515 states and 1665 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:31,656 INFO L93 Difference]: Finished difference Result 637 states and 2034 transitions. [2022-03-03 19:09:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:09:31,657 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 [2022-03-03 19:09:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:31,658 INFO L225 Difference]: With dead ends: 637 [2022-03-03 19:09:31,658 INFO L226 Difference]: Without dead ends: 576 [2022-03-03 19:09:31,658 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 [2022-03-03 19:09:31,659 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:31,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 107 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-03 19:09:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 488. [2022-03-03 19:09:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 3.240246406570842) internal successors, (1578), 487 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1578 transitions. [2022-03-03 19:09:31,665 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1578 transitions. Word has length 21 [2022-03-03 19:09:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:31,665 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1578 transitions. [2022-03-03 19:09:31,665 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) [2022-03-03 19:09:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1578 transitions. [2022-03-03 19:09:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:31,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:31,666 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] [2022-03-03 19:09:31,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:31,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 19:09:31,867 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2096627418, now seen corresponding path program 38 times [2022-03-03 19:09:31,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:31,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791967629] [2022-03-03 19:09:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:31,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:31,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791967629] [2022-03-03 19:09:31,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791967629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:31,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701563318] [2022-03-03 19:09:31,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:31,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:31,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:31,940 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) [2022-03-03 19:09:31,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:09:32,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:32,036 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 [2022-03-03 19:09:32,177 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 191 [2022-03-03 19:09:32,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 173 [2022-03-03 19:09:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:32,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:32,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 184 [2022-03-03 19:09:32,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:32,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:09:32,750 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 3 treesize of output 1 [2022-03-03 19:09:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:32,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701563318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:32,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:32,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:09:32,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803721855] [2022-03-03 19:09:32,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:32,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:32,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:32,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:32,779 INFO L87 Difference]: Start difference. First operand 488 states and 1578 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:32,888 INFO L93 Difference]: Finished difference Result 727 states and 2279 transitions. [2022-03-03 19:09:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:09:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:32,907 INFO L225 Difference]: With dead ends: 727 [2022-03-03 19:09:32,907 INFO L226 Difference]: Without dead ends: 675 [2022-03-03 19:09:32,908 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 [2022-03-03 19:09:32,908 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:32,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 66 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-03-03 19:09:32,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 490. [2022-03-03 19:09:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.2372188139059306) internal successors, (1583), 489 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1583 transitions. [2022-03-03 19:09:32,922 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1583 transitions. Word has length 21 [2022-03-03 19:09:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:32,922 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1583 transitions. [2022-03-03 19:09:32,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1583 transitions. [2022-03-03 19:09:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:32,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:32,923 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] [2022-03-03 19:09:32,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:33,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-03 19:09:33,140 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash -584773144, now seen corresponding path program 39 times [2022-03-03 19:09:33,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:33,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309108711] [2022-03-03 19:09:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:33,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:33,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309108711] [2022-03-03 19:09:33,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309108711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:33,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915268393] [2022-03-03 19:09:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:33,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:33,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:33,197 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) [2022-03-03 19:09:33,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:09:33,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:09:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:33,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:33,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:33,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:09:33,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-03 19:09:33,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-03-03 19:09:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:33,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:33,749 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 202 treesize of output 182 [2022-03-03 19:09:33,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:33,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:09:33,909 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 3 treesize of output 1 [2022-03-03 19:09:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:33,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915268393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:33,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:33,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:09:33,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595367913] [2022-03-03 19:09:33,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:33,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:33,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:33,922 INFO L87 Difference]: Start difference. First operand 490 states and 1583 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:33,997 INFO L93 Difference]: Finished difference Result 611 states and 1920 transitions. [2022-03-03 19:09:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:09:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:33,998 INFO L225 Difference]: With dead ends: 611 [2022-03-03 19:09:33,998 INFO L226 Difference]: Without dead ends: 554 [2022-03-03 19:09:33,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:09:33,999 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:33,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 61 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-03-03 19:09:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 463. [2022-03-03 19:09:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 3.1818181818181817) internal successors, (1470), 462 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1470 transitions. [2022-03-03 19:09:34,004 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1470 transitions. Word has length 21 [2022-03-03 19:09:34,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:34,005 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1470 transitions. [2022-03-03 19:09:34,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1470 transitions. [2022-03-03 19:09:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:34,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:34,005 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] [2022-03-03 19:09:34,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:09:34,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-03 19:09:34,224 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1917216036, now seen corresponding path program 40 times [2022-03-03 19:09:34,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:34,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947225855] [2022-03-03 19:09:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:34,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:34,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:34,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947225855] [2022-03-03 19:09:34,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947225855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:34,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131719785] [2022-03-03 19:09:34,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:34,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:34,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:34,276 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) [2022-03-03 19:09:34,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:09:34,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:34,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:34,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-03 19:09:34,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:34,553 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 17 treesize of output 13 [2022-03-03 19:09:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:34,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:34,683 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 3 treesize of output 1 [2022-03-03 19:09:34,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:34,815 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 243 treesize of output 221 [2022-03-03 19:09:34,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 192 [2022-03-03 19:09:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:35,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131719785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:35,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:35,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:09:35,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174258870] [2022-03-03 19:09:35,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:35,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:35,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:35,135 INFO L87 Difference]: Start difference. First operand 463 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:35,276 INFO L93 Difference]: Finished difference Result 616 states and 1877 transitions. [2022-03-03 19:09:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:09:35,276 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 [2022-03-03 19:09:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:35,277 INFO L225 Difference]: With dead ends: 616 [2022-03-03 19:09:35,277 INFO L226 Difference]: Without dead ends: 550 [2022-03-03 19:09:35,277 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 [2022-03-03 19:09:35,277 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:35,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 96 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:09:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-03-03 19:09:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 422. [2022-03-03 19:09:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 3.0688836104513064) internal successors, (1292), 421 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1292 transitions. [2022-03-03 19:09:35,283 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1292 transitions. Word has length 21 [2022-03-03 19:09:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:35,283 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 1292 transitions. [2022-03-03 19:09:35,283 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) [2022-03-03 19:09:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1292 transitions. [2022-03-03 19:09:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:35,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:35,283 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] [2022-03-03 19:09:35,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:35,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-03 19:09:35,484 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:35,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1518990988, now seen corresponding path program 41 times [2022-03-03 19:09:35,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:35,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354148369] [2022-03-03 19:09:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:35,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:35,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:35,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354148369] [2022-03-03 19:09:35,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354148369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:35,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398366709] [2022-03-03 19:09:35,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:35,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:35,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:35,580 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) [2022-03-03 19:09:35,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:09:35,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:35,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:35,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:35,768 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 212 treesize of output 184 [2022-03-03 19:09:36,026 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 20 treesize of output 16 [2022-03-03 19:09:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:36,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:36,258 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 239 treesize of output 211 [2022-03-03 19:09:36,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:36,265 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 188 [2022-03-03 19:09:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:36,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398366709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:36,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:36,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-03 19:09:36,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014675727] [2022-03-03 19:09:36,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:36,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:36,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:36,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:36,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:36,463 INFO L87 Difference]: Start difference. First operand 422 states and 1292 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:37,730 INFO L93 Difference]: Finished difference Result 870 states and 2496 transitions. [2022-03-03 19:09:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:09:37,730 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 [2022-03-03 19:09:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:37,731 INFO L225 Difference]: With dead ends: 870 [2022-03-03 19:09:37,731 INFO L226 Difference]: Without dead ends: 701 [2022-03-03 19:09:37,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=358, Invalid=1622, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:09:37,732 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 172 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:37,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 423 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:09:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-03 19:09:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 406. [2022-03-03 19:09:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.0320987654320986) internal successors, (1228), 405 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1228 transitions. [2022-03-03 19:09:37,738 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1228 transitions. Word has length 21 [2022-03-03 19:09:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:37,738 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1228 transitions. [2022-03-03 19:09:37,738 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) [2022-03-03 19:09:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1228 transitions. [2022-03-03 19:09:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:37,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:37,738 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] [2022-03-03 19:09:37,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:37,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:37,939 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:37,939 INFO L85 PathProgramCache]: Analyzing trace with hash 928205818, now seen corresponding path program 42 times [2022-03-03 19:09:37,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:37,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911079857] [2022-03-03 19:09:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:37,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:38,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:38,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911079857] [2022-03-03 19:09:38,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911079857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:38,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783004425] [2022-03-03 19:09:38,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:38,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:38,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:38,016 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) [2022-03-03 19:09:38,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:09:38,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:09:38,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:38,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:38,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 127 [2022-03-03 19:09:38,256 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 32 treesize of output 24 [2022-03-03 19:09:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:38,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:38,475 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 238 treesize of output 210 [2022-03-03 19:09:38,781 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:38,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:38,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783004425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:38,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:38,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:09:38,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550544718] [2022-03-03 19:09:38,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:38,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:09:38,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:09:38,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:09:38,813 INFO L87 Difference]: Start difference. First operand 406 states and 1228 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:38,925 INFO L93 Difference]: Finished difference Result 541 states and 1632 transitions. [2022-03-03 19:09:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:09:38,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:38,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:38,926 INFO L225 Difference]: With dead ends: 541 [2022-03-03 19:09:38,926 INFO L226 Difference]: Without dead ends: 495 [2022-03-03 19:09:38,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:38,927 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:38,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-03-03 19:09:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-03-03 19:09:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 432. [2022-03-03 19:09:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.046403712296984) internal successors, (1313), 431 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1313 transitions. [2022-03-03 19:09:38,932 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1313 transitions. Word has length 21 [2022-03-03 19:09:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:38,932 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1313 transitions. [2022-03-03 19:09:38,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1313 transitions. [2022-03-03 19:09:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:38,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:38,933 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] [2022-03-03 19:09:38,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:39,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-03 19:09:39,149 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:39,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:39,149 INFO L85 PathProgramCache]: Analyzing trace with hash 793518806, now seen corresponding path program 43 times [2022-03-03 19:09:39,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:39,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564932938] [2022-03-03 19:09:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:39,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:39,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564932938] [2022-03-03 19:09:39,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564932938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:39,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600341937] [2022-03-03 19:09:39,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:39,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:39,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:39,242 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) [2022-03-03 19:09:39,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:09:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:39,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:39,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 145 [2022-03-03 19:09:39,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-03-03 19:09:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:39,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:39,778 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 238 treesize of output 210 [2022-03-03 19:09:40,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:40,028 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 20 treesize of output 24 [2022-03-03 19:09:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:40,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600341937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:40,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:40,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:09:40,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503722708] [2022-03-03 19:09:40,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:40,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:09:40,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:09:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:09:40,058 INFO L87 Difference]: Start difference. First operand 432 states and 1313 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:40,226 INFO L93 Difference]: Finished difference Result 599 states and 1761 transitions. [2022-03-03 19:09:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:09:40,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:40,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:40,227 INFO L225 Difference]: With dead ends: 599 [2022-03-03 19:09:40,227 INFO L226 Difference]: Without dead ends: 538 [2022-03-03 19:09:40,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:40,228 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:40,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 96 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-03 19:09:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-03 19:09:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 443. [2022-03-03 19:09:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.0565610859728505) internal successors, (1351), 442 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1351 transitions. [2022-03-03 19:09:40,234 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1351 transitions. Word has length 21 [2022-03-03 19:09:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:40,234 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1351 transitions. [2022-03-03 19:09:40,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1351 transitions. [2022-03-03 19:09:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:40,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:40,235 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] [2022-03-03 19:09:40,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:40,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:40,446 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1146658296, now seen corresponding path program 44 times [2022-03-03 19:09:40,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:40,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586543351] [2022-03-03 19:09:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:40,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:40,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586543351] [2022-03-03 19:09:40,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586543351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:40,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583576774] [2022-03-03 19:09:40,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:40,555 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) [2022-03-03 19:09:40,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:09:40,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:40,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:40,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:40,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 299 [2022-03-03 19:09:40,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:40,877 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 275 [2022-03-03 19:09:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:41,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:41,350 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 263 treesize of output 231 [2022-03-03 19:09:41,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:41,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:41,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583576774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:41,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:41,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-03 19:09:41,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879449271] [2022-03-03 19:09:41,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:41,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:41,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:41,530 INFO L87 Difference]: Start difference. First operand 443 states and 1351 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:42,061 INFO L93 Difference]: Finished difference Result 1033 states and 3018 transitions. [2022-03-03 19:09:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:09:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:42,063 INFO L225 Difference]: With dead ends: 1033 [2022-03-03 19:09:42,063 INFO L226 Difference]: Without dead ends: 959 [2022-03-03 19:09:42,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:09:42,064 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 186 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:42,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 274 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-03 19:09:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 459. [2022-03-03 19:09:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 3.1222707423580784) internal successors, (1430), 458 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1430 transitions. [2022-03-03 19:09:42,073 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1430 transitions. Word has length 21 [2022-03-03 19:09:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:42,074 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1430 transitions. [2022-03-03 19:09:42,074 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) [2022-03-03 19:09:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1430 transitions. [2022-03-03 19:09:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:42,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:42,074 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] [2022-03-03 19:09:42,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-03 19:09:42,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-03 19:09:42,276 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash 155990242, now seen corresponding path program 45 times [2022-03-03 19:09:42,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:42,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963591532] [2022-03-03 19:09:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:42,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:42,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:42,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963591532] [2022-03-03 19:09:42,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963591532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:42,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311000014] [2022-03-03 19:09:42,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:42,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:42,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:42,341 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) [2022-03-03 19:09:42,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:09:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:09:42,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:42,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:42,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:42,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:42,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 143 [2022-03-03 19:09:42,561 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 32 treesize of output 24 [2022-03-03 19:09:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:42,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:42,807 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 280 treesize of output 252 [2022-03-03 19:09:43,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:43,069 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 21 treesize of output 25 [2022-03-03 19:09:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:43,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311000014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:43,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:43,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:09:43,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933282444] [2022-03-03 19:09:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:43,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:09:43,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:09:43,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:09:43,105 INFO L87 Difference]: Start difference. First operand 459 states and 1430 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:43,243 INFO L93 Difference]: Finished difference Result 579 states and 1773 transitions. [2022-03-03 19:09:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:09:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:43,244 INFO L225 Difference]: With dead ends: 579 [2022-03-03 19:09:43,244 INFO L226 Difference]: Without dead ends: 511 [2022-03-03 19:09:43,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:43,244 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:43,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 140 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-03-03 19:09:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-03 19:09:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 456. [2022-03-03 19:09:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 3.1164835164835165) internal successors, (1418), 455 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1418 transitions. [2022-03-03 19:09:43,251 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1418 transitions. Word has length 21 [2022-03-03 19:09:43,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:43,251 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1418 transitions. [2022-03-03 19:09:43,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1418 transitions. [2022-03-03 19:09:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:43,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:43,252 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] [2022-03-03 19:09:43,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:43,468 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:43,468 INFO L85 PathProgramCache]: Analyzing trace with hash 283941334, now seen corresponding path program 46 times [2022-03-03 19:09:43,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:43,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337862001] [2022-03-03 19:09:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:43,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:43,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:43,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337862001] [2022-03-03 19:09:43,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337862001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:43,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813883127] [2022-03-03 19:09:43,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:43,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:43,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:43,544 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) [2022-03-03 19:09:43,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:09:43,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:43,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:43,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:43,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:09:43,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 189 [2022-03-03 19:09:43,795 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 32 treesize of output 24 [2022-03-03 19:09:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:43,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:43,943 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 164 treesize of output 148 [2022-03-03 19:09:44,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:44,229 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 21 treesize of output 25 [2022-03-03 19:09:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:44,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813883127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:44,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:44,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-03 19:09:44,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896106835] [2022-03-03 19:09:44,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:44,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:09:44,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:44,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:09:44,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:09:44,261 INFO L87 Difference]: Start difference. First operand 456 states and 1418 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:44,373 INFO L93 Difference]: Finished difference Result 587 states and 1803 transitions. [2022-03-03 19:09:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:09:44,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:44,374 INFO L225 Difference]: With dead ends: 587 [2022-03-03 19:09:44,374 INFO L226 Difference]: Without dead ends: 551 [2022-03-03 19:09:44,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:44,374 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:44,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 109 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 327 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-03-03 19:09:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-03 19:09:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 454. [2022-03-03 19:09:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 3.1147902869757176) internal successors, (1411), 453 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1411 transitions. [2022-03-03 19:09:44,380 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1411 transitions. Word has length 21 [2022-03-03 19:09:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:44,380 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 1411 transitions. [2022-03-03 19:09:44,380 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) [2022-03-03 19:09:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1411 transitions. [2022-03-03 19:09:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:09:44,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:44,381 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] [2022-03-03 19:09:44,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:44,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:44,597 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1340912374, now seen corresponding path program 47 times [2022-03-03 19:09:44,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:44,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593346560] [2022-03-03 19:09:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:44,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:44,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593346560] [2022-03-03 19:09:44,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593346560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:44,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031661034] [2022-03-03 19:09:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:44,656 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) [2022-03-03 19:09:44,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:09:44,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-03 19:09:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:44,859 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 24 treesize of output 18 [2022-03-03 19:09:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:44,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:45,060 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 298 treesize of output 254 [2022-03-03 19:09:45,228 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:45,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:09:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:45,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031661034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:45,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:45,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-03 19:09:45,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137091458] [2022-03-03 19:09:45,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:45,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:09:45,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:09:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:09:45,232 INFO L87 Difference]: Start difference. First operand 454 states and 1411 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:45,728 INFO L93 Difference]: Finished difference Result 836 states and 2549 transitions. [2022-03-03 19:09:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:09:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:09:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:45,729 INFO L225 Difference]: With dead ends: 836 [2022-03-03 19:09:45,729 INFO L226 Difference]: Without dead ends: 747 [2022-03-03 19:09:45,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:09:45,730 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:45,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 235 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-03 19:09:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 428. [2022-03-03 19:09:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.070257611241218) internal successors, (1311), 427 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1311 transitions. [2022-03-03 19:09:45,736 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1311 transitions. Word has length 21 [2022-03-03 19:09:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:45,736 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1311 transitions. [2022-03-03 19:09:45,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1311 transitions. [2022-03-03 19:09:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:45,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:45,737 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] [2022-03-03 19:09:45,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:45,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-03 19:09:45,953 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:45,955 INFO L85 PathProgramCache]: Analyzing trace with hash -520581084, now seen corresponding path program 48 times [2022-03-03 19:09:45,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:45,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491389953] [2022-03-03 19:09:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:46,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:46,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491389953] [2022-03-03 19:09:46,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491389953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:46,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603323034] [2022-03-03 19:09:46,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:46,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:46,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:46,033 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) [2022-03-03 19:09:46,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:09:46,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:09:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:46,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:46,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:46,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:46,377 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:46,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:09:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:46,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603323034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:46,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:46,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-03 19:09:46,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493523662] [2022-03-03 19:09:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:46,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:46,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:46,381 INFO L87 Difference]: Start difference. First operand 428 states and 1311 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:47,130 INFO L93 Difference]: Finished difference Result 846 states and 2421 transitions. [2022-03-03 19:09:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:09:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:47,132 INFO L225 Difference]: With dead ends: 846 [2022-03-03 19:09:47,132 INFO L226 Difference]: Without dead ends: 776 [2022-03-03 19:09:47,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=1915, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:09:47,132 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:47,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 409 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:09:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-03 19:09:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 413. [2022-03-03 19:09:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0436893203883497) internal successors, (1254), 412 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1254 transitions. [2022-03-03 19:09:47,141 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1254 transitions. Word has length 22 [2022-03-03 19:09:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:47,141 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1254 transitions. [2022-03-03 19:09:47,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1254 transitions. [2022-03-03 19:09:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:47,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:47,142 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] [2022-03-03 19:09:47,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:47,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-03 19:09:47,358 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:47,359 INFO L85 PathProgramCache]: Analyzing trace with hash -780260828, now seen corresponding path program 49 times [2022-03-03 19:09:47,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:47,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610350045] [2022-03-03 19:09:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:47,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:47,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:47,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610350045] [2022-03-03 19:09:47,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610350045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:47,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219955736] [2022-03-03 19:09:47,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:47,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:47,433 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) [2022-03-03 19:09:47,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:09:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:47,585 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 20 treesize of output 14 [2022-03-03 19:09:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:47,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:47,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:47,732 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 18 treesize of output 22 [2022-03-03 19:09:47,759 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:47,760 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 8 treesize of output 7 [2022-03-03 19:09:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:47,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219955736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:47,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:47,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-03 19:09:47,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052618265] [2022-03-03 19:09:47,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:47,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:47,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:47,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:47,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:47,762 INFO L87 Difference]: Start difference. First operand 413 states and 1254 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:48,280 INFO L93 Difference]: Finished difference Result 851 states and 2463 transitions. [2022-03-03 19:09:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:09:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:48,282 INFO L225 Difference]: With dead ends: 851 [2022-03-03 19:09:48,282 INFO L226 Difference]: Without dead ends: 787 [2022-03-03 19:09:48,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:09:48,282 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:48,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 474 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:09:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-03-03 19:09:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 385. [2022-03-03 19:09:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0026041666666665) internal successors, (1153), 384 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1153 transitions. [2022-03-03 19:09:48,288 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1153 transitions. Word has length 22 [2022-03-03 19:09:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:48,288 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1153 transitions. [2022-03-03 19:09:48,288 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) [2022-03-03 19:09:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1153 transitions. [2022-03-03 19:09:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:48,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:48,289 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] [2022-03-03 19:09:48,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:48,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 19:09:48,495 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1638622410, now seen corresponding path program 50 times [2022-03-03 19:09:48,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:48,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125643702] [2022-03-03 19:09:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:48,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:48,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125643702] [2022-03-03 19:09:48,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125643702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:48,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793280261] [2022-03-03 19:09:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:48,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:48,572 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) [2022-03-03 19:09:48,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:09:48,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:48,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:48,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:48,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:48,730 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 20 treesize of output 14 [2022-03-03 19:09:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:48,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:48,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:48,921 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 13 treesize of output 17 [2022-03-03 19:09:48,941 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:48,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:09:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:48,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793280261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:48,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:48,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-03 19:09:48,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896541270] [2022-03-03 19:09:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:48,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:48,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:48,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:48,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:48,944 INFO L87 Difference]: Start difference. First operand 385 states and 1153 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:50,044 INFO L93 Difference]: Finished difference Result 900 states and 2592 transitions. [2022-03-03 19:09:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:09:50,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:50,046 INFO L225 Difference]: With dead ends: 900 [2022-03-03 19:09:50,046 INFO L226 Difference]: Without dead ends: 830 [2022-03-03 19:09:50,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=2218, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:09:50,046 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 202 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:50,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 584 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:09:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-03 19:09:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 396. [2022-03-03 19:09:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.9949367088607595) internal successors, (1183), 395 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1183 transitions. [2022-03-03 19:09:50,068 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1183 transitions. Word has length 22 [2022-03-03 19:09:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:50,068 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1183 transitions. [2022-03-03 19:09:50,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1183 transitions. [2022-03-03 19:09:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:50,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:50,069 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] [2022-03-03 19:09:50,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:50,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 19:09:50,270 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:50,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1991761900, now seen corresponding path program 51 times [2022-03-03 19:09:50,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:50,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372921715] [2022-03-03 19:09:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:50,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:50,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:50,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372921715] [2022-03-03 19:09:50,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372921715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:50,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156862966] [2022-03-03 19:09:50,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:09:50,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:50,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:50,322 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) [2022-03-03 19:09:50,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:09:50,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:09:50,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:50,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:50,505 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 20 treesize of output 14 [2022-03-03 19:09:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:50,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:50,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:50,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:50,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:50,724 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:09:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:50,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156862966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:50,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:50,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-03-03 19:09:50,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163886445] [2022-03-03 19:09:50,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:50,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:09:50,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:09:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:09:50,727 INFO L87 Difference]: Start difference. First operand 396 states and 1183 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:51,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:51,607 INFO L93 Difference]: Finished difference Result 894 states and 2573 transitions. [2022-03-03 19:09:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:09:51,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:51,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:51,609 INFO L225 Difference]: With dead ends: 894 [2022-03-03 19:09:51,609 INFO L226 Difference]: Without dead ends: 848 [2022-03-03 19:09:51,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=2351, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:09:51,609 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 167 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:51,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 644 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:09:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-03 19:09:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 378. [2022-03-03 19:09:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.973474801061008) internal successors, (1121), 377 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1121 transitions. [2022-03-03 19:09:51,615 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1121 transitions. Word has length 22 [2022-03-03 19:09:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 1121 transitions. [2022-03-03 19:09:51,615 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) [2022-03-03 19:09:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1121 transitions. [2022-03-03 19:09:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:51,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:51,616 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] [2022-03-03 19:09:51,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:51,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 19:09:51,827 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1817911674, now seen corresponding path program 52 times [2022-03-03 19:09:51,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:51,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350776067] [2022-03-03 19:09:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:51,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:51,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350776067] [2022-03-03 19:09:51,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350776067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:51,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229719465] [2022-03-03 19:09:51,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:09:51,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:51,884 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) [2022-03-03 19:09:51,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:09:51,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:09:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:09:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:52,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:52,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:52,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:52,227 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:52,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:09:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:52,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229719465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:52,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:52,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-03 19:09:52,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837703552] [2022-03-03 19:09:52,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:52,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:09:52,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:09:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:09:52,229 INFO L87 Difference]: Start difference. First operand 378 states and 1121 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:52,891 INFO L93 Difference]: Finished difference Result 726 states and 2091 transitions. [2022-03-03 19:09:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:09:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:52,892 INFO L225 Difference]: With dead ends: 726 [2022-03-03 19:09:52,892 INFO L226 Difference]: Without dead ends: 680 [2022-03-03 19:09:52,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:09:52,892 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 153 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:52,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 591 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:09:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-03-03 19:09:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 311. [2022-03-03 19:09:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.9161290322580644) internal successors, (904), 310 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 904 transitions. [2022-03-03 19:09:52,897 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 904 transitions. Word has length 22 [2022-03-03 19:09:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:52,897 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 904 transitions. [2022-03-03 19:09:52,897 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) [2022-03-03 19:09:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 904 transitions. [2022-03-03 19:09:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:52,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:52,898 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] [2022-03-03 19:09:52,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:53,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:53,111 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1282730021, now seen corresponding path program 53 times [2022-03-03 19:09:53,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:53,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45340750] [2022-03-03 19:09:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:09:53,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:53,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45340750] [2022-03-03 19:09:53,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45340750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:53,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535812877] [2022-03-03 19:09:53,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:09:53,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:53,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:53,216 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) [2022-03-03 19:09:53,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:09:53,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:09:53,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:53,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:09:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:53,415 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 42 treesize of output 34 [2022-03-03 19:09:53,537 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 39 treesize of output 31 [2022-03-03 19:09:53,541 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 35 treesize of output 27 [2022-03-03 19:09:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:53,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:53,741 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:09:53,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:09:53,841 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:09:53,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-03 19:09:53,845 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 [2022-03-03 19:09:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:53,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535812877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:53,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:53,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-03-03 19:09:53,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758837308] [2022-03-03 19:09:53,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:53,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:09:53,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:09:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:09:53,904 INFO L87 Difference]: Start difference. First operand 311 states and 904 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:54,669 INFO L93 Difference]: Finished difference Result 842 states and 2401 transitions. [2022-03-03 19:09:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:09:54,669 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 [2022-03-03 19:09:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:54,679 INFO L225 Difference]: With dead ends: 842 [2022-03-03 19:09:54,679 INFO L226 Difference]: Without dead ends: 724 [2022-03-03 19:09:54,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:09:54,679 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 235 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:54,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 241 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-03 19:09:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 338. [2022-03-03 19:09:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0089020771513355) internal successors, (1014), 337 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1014 transitions. [2022-03-03 19:09:54,684 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1014 transitions. Word has length 22 [2022-03-03 19:09:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:54,684 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 1014 transitions. [2022-03-03 19:09:54,685 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) [2022-03-03 19:09:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1014 transitions. [2022-03-03 19:09:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:54,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:54,685 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] [2022-03-03 19:09:54,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:54,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:54,908 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash 443034195, now seen corresponding path program 54 times [2022-03-03 19:09:54,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:54,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788337046] [2022-03-03 19:09:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:55,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:55,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788337046] [2022-03-03 19:09:55,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788337046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:55,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912390330] [2022-03-03 19:09:55,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:09:55,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:55,032 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) [2022-03-03 19:09:55,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:09:55,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:09:55,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:55,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:09:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:55,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-03 19:09:55,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:09:55,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-03 19:09:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:55,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:55,445 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:09:55,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:55,500 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:55,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:55,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:55,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:09:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:55,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912390330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:55,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:55,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-03 19:09:55,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936371336] [2022-03-03 19:09:55,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:55,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:09:55,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:09:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:09:55,562 INFO L87 Difference]: Start difference. First operand 338 states and 1014 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:56,736 INFO L93 Difference]: Finished difference Result 906 states and 2539 transitions. [2022-03-03 19:09:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:09:56,737 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:56,738 INFO L225 Difference]: With dead ends: 906 [2022-03-03 19:09:56,738 INFO L226 Difference]: Without dead ends: 744 [2022-03-03 19:09:56,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=399, Invalid=1241, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:09:56,738 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 307 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:56,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 236 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-03-03 19:09:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 331. [2022-03-03 19:09:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2022-03-03 19:09:56,743 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2022-03-03 19:09:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:56,743 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2022-03-03 19:09:56,743 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) [2022-03-03 19:09:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2022-03-03 19:09:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:56,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:56,744 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] [2022-03-03 19:09:56,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:56,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:56,960 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1922553573, now seen corresponding path program 55 times [2022-03-03 19:09:56,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:56,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038545040] [2022-03-03 19:09:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:57,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:57,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038545040] [2022-03-03 19:09:57,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038545040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:57,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394025130] [2022-03-03 19:09:57,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:09:57,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:57,060 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) [2022-03-03 19:09:57,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:09:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:57,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:09:57,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:57,261 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 39 treesize of output 31 [2022-03-03 19:09:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:57,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:57,420 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:09:57,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:57,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:57,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:09:57,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:57,495 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:09:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:57,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394025130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:57,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:57,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-03 19:09:57,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025786511] [2022-03-03 19:09:57,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:57,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:09:57,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:09:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:09:57,548 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:58,094 INFO L93 Difference]: Finished difference Result 715 states and 2040 transitions. [2022-03-03 19:09:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:09:58,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:58,095 INFO L225 Difference]: With dead ends: 715 [2022-03-03 19:09:58,095 INFO L226 Difference]: Without dead ends: 575 [2022-03-03 19:09:58,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:09:58,096 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:58,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 187 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:09:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-03 19:09:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 324. [2022-03-03 19:09:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.959752321981424) internal successors, (956), 323 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 956 transitions. [2022-03-03 19:09:58,100 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 956 transitions. Word has length 22 [2022-03-03 19:09:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:58,100 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 956 transitions. [2022-03-03 19:09:58,100 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) [2022-03-03 19:09:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 956 transitions. [2022-03-03 19:09:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:58,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:58,101 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] [2022-03-03 19:09:58,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:09:58,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:58,303 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:09:58,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:09:58,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1403862611, now seen corresponding path program 56 times [2022-03-03 19:09:58,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:09:58,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225266072] [2022-03-03 19:09:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:09:58,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:09:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:09:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:09:58,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:09:58,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225266072] [2022-03-03 19:09:58,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225266072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:09:58,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517451556] [2022-03-03 19:09:58,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:09:58,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:09:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:09:58,424 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) [2022-03-03 19:09:58,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:09:58,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:09:58,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:09:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:09:58,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:09:58,589 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 39 treesize of output 31 [2022-03-03 19:09:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:58,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:09:58,810 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:09:58,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:09:58,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:58,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:09:58,871 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:09:58,871 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 43 treesize of output 41 [2022-03-03 19:09:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:09:58,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517451556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:09:58,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:09:58,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-03 19:09:58,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820194522] [2022-03-03 19:09:58,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:09:58,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:09:58,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:09:58,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:09:58,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:09:58,940 INFO L87 Difference]: Start difference. First operand 324 states and 956 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:59,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:09:59,885 INFO L93 Difference]: Finished difference Result 950 states and 2685 transitions. [2022-03-03 19:09:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:09:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:09:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:09:59,887 INFO L225 Difference]: With dead ends: 950 [2022-03-03 19:09:59,887 INFO L226 Difference]: Without dead ends: 698 [2022-03-03 19:09:59,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1605, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:09:59,887 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 256 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:09:59,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 331 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:09:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-03-03 19:09:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 324. [2022-03-03 19:09:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.931888544891641) internal successors, (947), 323 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:09:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 947 transitions. [2022-03-03 19:09:59,893 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 947 transitions. Word has length 22 [2022-03-03 19:09:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:09:59,893 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 947 transitions. [2022-03-03 19:09:59,893 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) [2022-03-03 19:09:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 947 transitions. [2022-03-03 19:09:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:09:59,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:09:59,894 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] [2022-03-03 19:09:59,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:00,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:00,103 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash 827673381, now seen corresponding path program 57 times [2022-03-03 19:10:00,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:00,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039689538] [2022-03-03 19:10:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:00,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:00,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039689538] [2022-03-03 19:10:00,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039689538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:00,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481450650] [2022-03-03 19:10:00,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:00,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:00,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:00,296 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) [2022-03-03 19:10:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:10:00,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:10:00,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:00,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:10:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:00,552 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 293 treesize of output 247 [2022-03-03 19:10:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:00,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:00,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:10:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:00,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:00,902 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 3 treesize of output 1 [2022-03-03 19:10:01,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 244 [2022-03-03 19:10:01,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:01,112 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 251 treesize of output 221 [2022-03-03 19:10:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:01,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481450650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:01,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:01,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2022-03-03 19:10:01,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335590751] [2022-03-03 19:10:01,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:01,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:10:01,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:01,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:10:01,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:10:01,410 INFO L87 Difference]: Start difference. First operand 324 states and 947 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:01,852 INFO L93 Difference]: Finished difference Result 924 states and 2663 transitions. [2022-03-03 19:10:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:10:01,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:01,854 INFO L225 Difference]: With dead ends: 924 [2022-03-03 19:10:01,854 INFO L226 Difference]: Without dead ends: 806 [2022-03-03 19:10:01,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:10:01,854 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 236 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:01,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 174 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 407 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-03-03 19:10:01,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-03 19:10:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 362. [2022-03-03 19:10:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0304709141274238) internal successors, (1094), 361 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1094 transitions. [2022-03-03 19:10:01,860 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1094 transitions. Word has length 22 [2022-03-03 19:10:01,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:01,860 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1094 transitions. [2022-03-03 19:10:01,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:01,860 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1094 transitions. [2022-03-03 19:10:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:01,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:01,861 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] [2022-03-03 19:10:01,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-03 19:10:02,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-03 19:10:02,075 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash -12022445, now seen corresponding path program 58 times [2022-03-03 19:10:02,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:02,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517848427] [2022-03-03 19:10:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:02,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:02,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:02,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517848427] [2022-03-03 19:10:02,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517848427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:02,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701645046] [2022-03-03 19:10:02,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:02,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:02,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:02,149 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) [2022-03-03 19:10:02,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:10:02,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:02,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:02,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:02,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:02,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:02,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:10:02,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-03 19:10:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:02,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:02,616 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:02,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:02,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:02,653 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 47 treesize of output 45 [2022-03-03 19:10:02,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:02,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:02,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701645046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:02,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:02,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-03 19:10:02,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65701364] [2022-03-03 19:10:02,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:02,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:02,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:02,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:02,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:02,737 INFO L87 Difference]: Start difference. First operand 362 states and 1094 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:03,293 INFO L93 Difference]: Finished difference Result 692 states and 1988 transitions. [2022-03-03 19:10:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:10:03,293 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 [2022-03-03 19:10:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:03,294 INFO L225 Difference]: With dead ends: 692 [2022-03-03 19:10:03,294 INFO L226 Difference]: Without dead ends: 459 [2022-03-03 19:10:03,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:10:03,295 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 168 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:03,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 233 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 473 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-03-03 19:10:03,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-03 19:10:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 363. [2022-03-03 19:10:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 3.022099447513812) internal successors, (1094), 362 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1094 transitions. [2022-03-03 19:10:03,299 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1094 transitions. Word has length 22 [2022-03-03 19:10:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:03,299 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1094 transitions. [2022-03-03 19:10:03,299 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) [2022-03-03 19:10:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1094 transitions. [2022-03-03 19:10:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:03,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:03,300 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] [2022-03-03 19:10:03,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:03,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-03 19:10:03,512 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1508687481, now seen corresponding path program 59 times [2022-03-03 19:10:03,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:03,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881844481] [2022-03-03 19:10:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:03,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:03,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:03,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881844481] [2022-03-03 19:10:03,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881844481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:03,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706522045] [2022-03-03 19:10:03,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:03,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:03,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:03,605 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) [2022-03-03 19:10:03,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:10:03,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:03,839 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 39 treesize of output 31 [2022-03-03 19:10:03,978 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 31 treesize of output 23 [2022-03-03 19:10:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:04,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:04,118 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:04,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:04,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:04,178 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 42 treesize of output 40 [2022-03-03 19:10:04,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:04,183 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 38 treesize of output 36 [2022-03-03 19:10:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:04,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706522045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:04,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:04,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 22 [2022-03-03 19:10:04,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30952159] [2022-03-03 19:10:04,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:04,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:04,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:04,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:04,270 INFO L87 Difference]: Start difference. First operand 363 states and 1094 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:04,835 INFO L93 Difference]: Finished difference Result 787 states and 2270 transitions. [2022-03-03 19:10:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:10:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:04,837 INFO L225 Difference]: With dead ends: 787 [2022-03-03 19:10:04,837 INFO L226 Difference]: Without dead ends: 665 [2022-03-03 19:10:04,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:10:04,837 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 217 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:04,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 280 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:04,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-03 19:10:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 354. [2022-03-03 19:10:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.997167138810198) internal successors, (1058), 353 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2022-03-03 19:10:04,842 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 22 [2022-03-03 19:10:04,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:04,842 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2022-03-03 19:10:04,842 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) [2022-03-03 19:10:04,842 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2022-03-03 19:10:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:04,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:04,843 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] [2022-03-03 19:10:04,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:05,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:05,051 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 246772879, now seen corresponding path program 60 times [2022-03-03 19:10:05,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:05,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555753423] [2022-03-03 19:10:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:05,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:05,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555753423] [2022-03-03 19:10:05,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555753423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:05,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269689677] [2022-03-03 19:10:05,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:05,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:05,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:05,244 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) [2022-03-03 19:10:05,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:10:05,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:10:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:05,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:05,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:05,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:05,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:10:05,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:05,849 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-03 19:10:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:05,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:06,062 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:06,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:06,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:06,142 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 47 treesize of output 45 [2022-03-03 19:10:06,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:06,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:06,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269689677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:06,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:06,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-03 19:10:06,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631216975] [2022-03-03 19:10:06,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:06,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:06,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:06,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:06,282 INFO L87 Difference]: Start difference. First operand 354 states and 1058 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:06,706 INFO L93 Difference]: Finished difference Result 710 states and 2011 transitions. [2022-03-03 19:10:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:10:06,706 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 [2022-03-03 19:10:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:06,707 INFO L225 Difference]: With dead ends: 710 [2022-03-03 19:10:06,707 INFO L226 Difference]: Without dead ends: 661 [2022-03-03 19:10:06,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:06,708 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:06,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 238 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 408 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-03-03 19:10:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-03-03 19:10:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 356. [2022-03-03 19:10:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0028169014084507) internal successors, (1066), 355 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1066 transitions. [2022-03-03 19:10:06,713 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1066 transitions. Word has length 22 [2022-03-03 19:10:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:06,713 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1066 transitions. [2022-03-03 19:10:06,713 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) [2022-03-03 19:10:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1066 transitions. [2022-03-03 19:10:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:06,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:06,713 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] [2022-03-03 19:10:06,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:06,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:06,932 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash 589022373, now seen corresponding path program 61 times [2022-03-03 19:10:06,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:06,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595657338] [2022-03-03 19:10:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:07,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:07,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595657338] [2022-03-03 19:10:07,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595657338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:07,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439638877] [2022-03-03 19:10:07,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:07,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:07,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:07,050 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) [2022-03-03 19:10:07,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:10:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:07,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:07,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:07,447 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-03 19:10:07,579 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 44 treesize of output 36 [2022-03-03 19:10:07,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:07,582 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:10:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:07,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:07,730 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:07,730 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 7 treesize of output 3 [2022-03-03 19:10:07,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:07,804 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 47 treesize of output 45 [2022-03-03 19:10:07,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:07,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:07,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439638877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:07,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:07,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2022-03-03 19:10:07,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528170566] [2022-03-03 19:10:07,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:07,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:10:07,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:10:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:10:07,943 INFO L87 Difference]: Start difference. First operand 356 states and 1066 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:08,528 INFO L93 Difference]: Finished difference Result 592 states and 1705 transitions. [2022-03-03 19:10:08,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:10:08,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:08,529 INFO L225 Difference]: With dead ends: 592 [2022-03-03 19:10:08,529 INFO L226 Difference]: Without dead ends: 460 [2022-03-03 19:10:08,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:10:08,530 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 124 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:08,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 190 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 505 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-03-03 19:10:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-03 19:10:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 355. [2022-03-03 19:10:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0028248587570623) internal successors, (1063), 354 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1063 transitions. [2022-03-03 19:10:08,534 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1063 transitions. Word has length 22 [2022-03-03 19:10:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:08,534 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1063 transitions. [2022-03-03 19:10:08,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1063 transitions. [2022-03-03 19:10:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:08,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:08,535 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] [2022-03-03 19:10:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:08,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-03 19:10:08,747 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1722390457, now seen corresponding path program 62 times [2022-03-03 19:10:08,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:08,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050696988] [2022-03-03 19:10:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:08,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:08,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050696988] [2022-03-03 19:10:08,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050696988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:08,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994703279] [2022-03-03 19:10:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:08,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:08,892 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) [2022-03-03 19:10:08,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:10:08,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:09,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:09,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:09,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:09,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:10:09,214 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 39 treesize of output 33 [2022-03-03 19:10:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:09,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:09,347 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:09,348 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 7 treesize of output 3 [2022-03-03 19:10:09,398 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:09,399 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 [2022-03-03 19:10:09,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:09,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:10:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:09,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994703279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:09,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:09,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:09,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344892429] [2022-03-03 19:10:09,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:09,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:09,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:09,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:09,478 INFO L87 Difference]: Start difference. First operand 355 states and 1063 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:09,888 INFO L93 Difference]: Finished difference Result 762 states and 2163 transitions. [2022-03-03 19:10:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:10:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:09,890 INFO L225 Difference]: With dead ends: 762 [2022-03-03 19:10:09,890 INFO L226 Difference]: Without dead ends: 713 [2022-03-03 19:10:09,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:10:09,890 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 262 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:09,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 225 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 478 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-03-03 19:10:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-03 19:10:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 358. [2022-03-03 19:10:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0168067226890756) internal successors, (1077), 357 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1077 transitions. [2022-03-03 19:10:09,895 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1077 transitions. Word has length 22 [2022-03-03 19:10:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:09,895 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1077 transitions. [2022-03-03 19:10:09,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:09,895 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1077 transitions. [2022-03-03 19:10:09,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:09,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:09,896 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] [2022-03-03 19:10:09,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:10,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:10,112 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2064639951, now seen corresponding path program 63 times [2022-03-03 19:10:10,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:10,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548649989] [2022-03-03 19:10:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:10,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:10,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548649989] [2022-03-03 19:10:10,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548649989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:10,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776982820] [2022-03-03 19:10:10,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:10,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:10,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:10,287 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) [2022-03-03 19:10:10,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:10:10,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:10:10,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:10,612 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:10,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:10,765 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 45 treesize of output 35 [2022-03-03 19:10:10,767 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 39 treesize of output 33 [2022-03-03 19:10:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:10,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:10,887 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:10,887 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 7 treesize of output 3 [2022-03-03 19:10:10,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:10,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:10,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:10,955 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 43 treesize of output 41 [2022-03-03 19:10:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:11,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776982820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:11,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:11,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:10:11,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952140439] [2022-03-03 19:10:11,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:11,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:11,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:11,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:11,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:11,032 INFO L87 Difference]: Start difference. First operand 358 states and 1077 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:11,531 INFO L93 Difference]: Finished difference Result 738 states and 2083 transitions. [2022-03-03 19:10:11,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:10:11,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:11,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:11,532 INFO L225 Difference]: With dead ends: 738 [2022-03-03 19:10:11,532 INFO L226 Difference]: Without dead ends: 553 [2022-03-03 19:10:11,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:10:11,532 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 166 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:11,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 274 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 606 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-03-03 19:10:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-03 19:10:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 350. [2022-03-03 19:10:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.988538681948424) internal successors, (1043), 349 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1043 transitions. [2022-03-03 19:10:11,537 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1043 transitions. Word has length 22 [2022-03-03 19:10:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:11,537 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1043 transitions. [2022-03-03 19:10:11,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1043 transitions. [2022-03-03 19:10:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:11,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:11,538 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] [2022-03-03 19:10:11,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:11,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:11,754 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:11,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash 661612367, now seen corresponding path program 64 times [2022-03-03 19:10:11,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:11,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8117293] [2022-03-03 19:10:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:11,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:11,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:11,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8117293] [2022-03-03 19:10:11,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8117293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:11,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017222571] [2022-03-03 19:10:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:11,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:11,864 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) [2022-03-03 19:10:11,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:10:11,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:11,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:12,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:12,255 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-03 19:10:12,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:12,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:12,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:12,595 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:12,595 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 7 treesize of output 3 [2022-03-03 19:10:12,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:12,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:10:12,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:12,677 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-03-03 19:10:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:12,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017222571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:12,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:12,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-03 19:10:12,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220297798] [2022-03-03 19:10:12,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:12,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:12,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:12,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:12,879 INFO L87 Difference]: Start difference. First operand 350 states and 1043 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:13,251 INFO L93 Difference]: Finished difference Result 481 states and 1428 transitions. [2022-03-03 19:10:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:10:13,252 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 [2022-03-03 19:10:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:13,252 INFO L225 Difference]: With dead ends: 481 [2022-03-03 19:10:13,252 INFO L226 Difference]: Without dead ends: 472 [2022-03-03 19:10:13,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:10:13,253 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:13,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 135 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 330 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-03-03 19:10:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-03 19:10:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2022-03-03 19:10:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9827586206896552) internal successors, (1038), 348 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1038 transitions. [2022-03-03 19:10:13,257 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1038 transitions. Word has length 22 [2022-03-03 19:10:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:13,257 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1038 transitions. [2022-03-03 19:10:13,257 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) [2022-03-03 19:10:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1038 transitions. [2022-03-03 19:10:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:13,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:13,258 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] [2022-03-03 19:10:13,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:13,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-03 19:10:13,471 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1028330537, now seen corresponding path program 65 times [2022-03-03 19:10:13,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:13,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903149061] [2022-03-03 19:10:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:13,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:13,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903149061] [2022-03-03 19:10:13,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903149061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:13,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537151796] [2022-03-03 19:10:13,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:13,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:13,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:13,633 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) [2022-03-03 19:10:13,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:10:13,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:13,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:13,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:13,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:10:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:13,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:14,022 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:14,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:14,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:14,077 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 42 treesize of output 40 [2022-03-03 19:10:14,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:14,081 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 38 treesize of output 36 [2022-03-03 19:10:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:14,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537151796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:14,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:14,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-03 19:10:14,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606031367] [2022-03-03 19:10:14,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:14,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:10:14,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:10:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:14,143 INFO L87 Difference]: Start difference. First operand 349 states and 1038 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:14,909 INFO L93 Difference]: Finished difference Result 663 states and 1878 transitions. [2022-03-03 19:10:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:10:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:14,911 INFO L225 Difference]: With dead ends: 663 [2022-03-03 19:10:14,911 INFO L226 Difference]: Without dead ends: 657 [2022-03-03 19:10:14,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:10:14,911 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 288 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:14,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 234 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-03 19:10:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 341. [2022-03-03 19:10:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.961764705882353) internal successors, (1007), 340 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1007 transitions. [2022-03-03 19:10:14,916 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1007 transitions. Word has length 22 [2022-03-03 19:10:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:14,916 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1007 transitions. [2022-03-03 19:10:14,916 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) [2022-03-03 19:10:14,916 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1007 transitions. [2022-03-03 19:10:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:14,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:14,917 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] [2022-03-03 19:10:14,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:15,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:15,117 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:15,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1467496933, now seen corresponding path program 66 times [2022-03-03 19:10:15,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:15,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398868788] [2022-03-03 19:10:15,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:15,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:15,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:15,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398868788] [2022-03-03 19:10:15,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398868788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:15,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471077903] [2022-03-03 19:10:15,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:15,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:15,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:15,295 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) [2022-03-03 19:10:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:10:15,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:10:15,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:15,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:15,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:15,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:15,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:15,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:15,904 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:15,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:15,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:15,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:15,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:15,981 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 43 treesize of output 41 [2022-03-03 19:10:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:16,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471077903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:16,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:16,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:16,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18690195] [2022-03-03 19:10:16,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:16,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:16,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:16,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:16,091 INFO L87 Difference]: Start difference. First operand 341 states and 1007 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:16,508 INFO L93 Difference]: Finished difference Result 587 states and 1657 transitions. [2022-03-03 19:10:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:10:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:16,509 INFO L225 Difference]: With dead ends: 587 [2022-03-03 19:10:16,509 INFO L226 Difference]: Without dead ends: 529 [2022-03-03 19:10:16,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:10:16,510 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:16,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 212 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 322 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-03-03 19:10:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-03 19:10:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 393. [2022-03-03 19:10:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.9770408163265305) internal successors, (1167), 392 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1167 transitions. [2022-03-03 19:10:16,515 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1167 transitions. Word has length 22 [2022-03-03 19:10:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:16,515 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1167 transitions. [2022-03-03 19:10:16,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1167 transitions. [2022-03-03 19:10:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:16,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:16,515 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] [2022-03-03 19:10:16,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:16,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:16,719 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1748935899, now seen corresponding path program 67 times [2022-03-03 19:10:16,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:16,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800449638] [2022-03-03 19:10:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:16,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:16,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800449638] [2022-03-03 19:10:16,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800449638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:16,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837270949] [2022-03-03 19:10:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:16,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:16,837 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) [2022-03-03 19:10:16,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:10:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:17,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:17,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:17,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:17,402 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-03 19:10:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:17,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:17,493 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:17,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:17,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:17,563 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 47 treesize of output 45 [2022-03-03 19:10:17,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:17,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:17,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837270949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:17,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:17,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:17,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016616071] [2022-03-03 19:10:17,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:17,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:17,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:17,670 INFO L87 Difference]: Start difference. First operand 393 states and 1167 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:18,088 INFO L93 Difference]: Finished difference Result 647 states and 1846 transitions. [2022-03-03 19:10:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:10:18,089 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:18,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:18,089 INFO L225 Difference]: With dead ends: 647 [2022-03-03 19:10:18,090 INFO L226 Difference]: Without dead ends: 604 [2022-03-03 19:10:18,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:10:18,090 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:18,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 211 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 142 Unchecked, 0.1s Time] [2022-03-03 19:10:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-03 19:10:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 420. [2022-03-03 19:10:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.990453460620525) internal successors, (1253), 419 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1253 transitions. [2022-03-03 19:10:18,096 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1253 transitions. Word has length 22 [2022-03-03 19:10:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:18,096 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1253 transitions. [2022-03-03 19:10:18,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1253 transitions. [2022-03-03 19:10:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:18,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:18,097 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] [2022-03-03 19:10:18,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:18,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-03 19:10:18,298 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1395243365, now seen corresponding path program 68 times [2022-03-03 19:10:18,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:18,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822435849] [2022-03-03 19:10:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:18,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:18,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:18,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822435849] [2022-03-03 19:10:18,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822435849] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:18,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446087301] [2022-03-03 19:10:18,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:18,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:18,503 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) [2022-03-03 19:10:18,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:10:18,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:18,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:18,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:18,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:18,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:19,112 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-03 19:10:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:19,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:19,220 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:19,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:19,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:19,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:19,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:19,287 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 43 treesize of output 41 [2022-03-03 19:10:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:19,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446087301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:19,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:19,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:19,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037578514] [2022-03-03 19:10:19,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:19,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:19,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:19,404 INFO L87 Difference]: Start difference. First operand 420 states and 1253 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:19,621 INFO L93 Difference]: Finished difference Result 580 states and 1686 transitions. [2022-03-03 19:10:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:19,622 INFO L225 Difference]: With dead ends: 580 [2022-03-03 19:10:19,622 INFO L226 Difference]: Without dead ends: 442 [2022-03-03 19:10:19,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:10:19,623 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:19,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 182 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 403 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-03-03 19:10:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-03 19:10:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 380. [2022-03-03 19:10:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9577836411609497) internal successors, (1121), 379 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1121 transitions. [2022-03-03 19:10:19,627 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1121 transitions. Word has length 22 [2022-03-03 19:10:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1121 transitions. [2022-03-03 19:10:19,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1121 transitions. [2022-03-03 19:10:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:19,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:19,628 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] [2022-03-03 19:10:19,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:19,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:19,844 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1556958159, now seen corresponding path program 69 times [2022-03-03 19:10:19,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:19,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564837602] [2022-03-03 19:10:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:19,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:20,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:20,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564837602] [2022-03-03 19:10:20,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564837602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:20,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132420155] [2022-03-03 19:10:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:20,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:20,008 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) [2022-03-03 19:10:20,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:10:20,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:10:20,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:20,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:20,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:20,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:10:20,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:20,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:10:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:20,969 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:10:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:21,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:21,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:21,211 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 47 treesize of output 45 [2022-03-03 19:10:21,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:21,350 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 14 treesize of output 18 [2022-03-03 19:10:21,361 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:21,361 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 [2022-03-03 19:10:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:21,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132420155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:21,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:21,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:21,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129022301] [2022-03-03 19:10:21,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:21,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:21,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:21,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:21,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:21,375 INFO L87 Difference]: Start difference. First operand 380 states and 1121 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:21,539 INFO L93 Difference]: Finished difference Result 520 states and 1555 transitions. [2022-03-03 19:10:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:10:21,539 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 [2022-03-03 19:10:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:21,540 INFO L225 Difference]: With dead ends: 520 [2022-03-03 19:10:21,540 INFO L226 Difference]: Without dead ends: 520 [2022-03-03 19:10:21,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:10:21,540 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 188 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:21,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 155 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 290 Invalid, 0 Unknown, 137 Unchecked, 0.1s Time] [2022-03-03 19:10:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-03 19:10:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 392. [2022-03-03 19:10:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.9846547314578005) internal successors, (1167), 391 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1167 transitions. [2022-03-03 19:10:21,545 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1167 transitions. Word has length 22 [2022-03-03 19:10:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:21,545 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 1167 transitions. [2022-03-03 19:10:21,545 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) [2022-03-03 19:10:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1167 transitions. [2022-03-03 19:10:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:21,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:21,546 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] [2022-03-03 19:10:21,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:21,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:21,759 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1243406173, now seen corresponding path program 70 times [2022-03-03 19:10:21,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:21,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426063769] [2022-03-03 19:10:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:21,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:21,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:21,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426063769] [2022-03-03 19:10:21,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426063769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:21,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802762506] [2022-03-03 19:10:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:21,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:21,825 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) [2022-03-03 19:10:21,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:10:21,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:21,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:21,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:22,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:22,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:10:22,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:22,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:22,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:22,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:22,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:10:22,611 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:22,611 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 14 treesize of output 18 [2022-03-03 19:10:22,624 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:22,624 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 7 treesize of output 3 [2022-03-03 19:10:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:22,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802762506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:22,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:22,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-03-03 19:10:22,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822570405] [2022-03-03 19:10:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:22,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:10:22,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:10:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:10:22,642 INFO L87 Difference]: Start difference. First operand 392 states and 1167 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:22,862 INFO L93 Difference]: Finished difference Result 661 states and 2002 transitions. [2022-03-03 19:10:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:22,863 INFO L225 Difference]: With dead ends: 661 [2022-03-03 19:10:22,863 INFO L226 Difference]: Without dead ends: 584 [2022-03-03 19:10:22,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:10:22,863 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:22,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 218 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 382 Invalid, 0 Unknown, 252 Unchecked, 0.1s Time] [2022-03-03 19:10:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-03 19:10:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2022-03-03 19:10:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 3.0779816513761467) internal successors, (1342), 436 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1342 transitions. [2022-03-03 19:10:22,869 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1342 transitions. Word has length 22 [2022-03-03 19:10:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:22,869 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1342 transitions. [2022-03-03 19:10:22,869 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) [2022-03-03 19:10:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1342 transitions. [2022-03-03 19:10:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:22,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:22,870 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] [2022-03-03 19:10:22,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:23,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:23,086 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:23,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:23,086 INFO L85 PathProgramCache]: Analyzing trace with hash -769451599, now seen corresponding path program 71 times [2022-03-03 19:10:23,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:23,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518837786] [2022-03-03 19:10:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:23,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:23,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518837786] [2022-03-03 19:10:23,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518837786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:23,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3248542] [2022-03-03 19:10:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:23,218 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) [2022-03-03 19:10:23,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:10:23,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:23,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:23,387 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 50 treesize of output 40 [2022-03-03 19:10:23,567 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 [2022-03-03 19:10:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:23,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:23,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:23,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:23,773 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 12 treesize of output 16 [2022-03-03 19:10:23,779 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:23,780 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 7 treesize of output 3 [2022-03-03 19:10:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:23,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3248542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:23,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:23,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:10:23,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751354625] [2022-03-03 19:10:23,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:23,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:10:23,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:10:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:23,788 INFO L87 Difference]: Start difference. First operand 437 states and 1342 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:24,211 INFO L93 Difference]: Finished difference Result 876 states and 2518 transitions. [2022-03-03 19:10:24,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:24,212 INFO L225 Difference]: With dead ends: 876 [2022-03-03 19:10:24,212 INFO L226 Difference]: Without dead ends: 794 [2022-03-03 19:10:24,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:10:24,212 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:24,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 270 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-03 19:10:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 414. [2022-03-03 19:10:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 3.053268765133172) internal successors, (1261), 413 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1261 transitions. [2022-03-03 19:10:24,219 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1261 transitions. Word has length 22 [2022-03-03 19:10:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:24,219 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1261 transitions. [2022-03-03 19:10:24,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1261 transitions. [2022-03-03 19:10:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:24,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:24,219 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] [2022-03-03 19:10:24,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-03 19:10:24,436 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 717262333, now seen corresponding path program 72 times [2022-03-03 19:10:24,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:24,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583502901] [2022-03-03 19:10:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:24,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:24,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:24,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583502901] [2022-03-03 19:10:24,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583502901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:24,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551763514] [2022-03-03 19:10:24,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:24,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:24,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:24,523 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) [2022-03-03 19:10:24,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:10:24,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:10:24,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:24,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:24,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:24,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:24,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:10:24,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:24,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-03 19:10:24,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:10:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:25,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:25,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:25,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:10:25,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:25,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-03 19:10:25,253 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:25,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:25,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551763514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:25,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:25,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:25,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25876966] [2022-03-03 19:10:25,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:25,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:25,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:25,272 INFO L87 Difference]: Start difference. First operand 414 states and 1261 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:25,713 INFO L93 Difference]: Finished difference Result 953 states and 2735 transitions. [2022-03-03 19:10:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:10:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:25,715 INFO L225 Difference]: With dead ends: 953 [2022-03-03 19:10:25,715 INFO L226 Difference]: Without dead ends: 751 [2022-03-03 19:10:25,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:10:25,715 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:25,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 258 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 629 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-03-03 19:10:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-03-03 19:10:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 433. [2022-03-03 19:10:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.064814814814815) internal successors, (1324), 432 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1324 transitions. [2022-03-03 19:10:25,721 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1324 transitions. Word has length 22 [2022-03-03 19:10:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:25,721 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1324 transitions. [2022-03-03 19:10:25,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1324 transitions. [2022-03-03 19:10:25,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:25,722 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:25,722 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] [2022-03-03 19:10:25,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:25,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:25,926 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:25,926 INFO L85 PathProgramCache]: Analyzing trace with hash 56462821, now seen corresponding path program 73 times [2022-03-03 19:10:25,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:25,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403574709] [2022-03-03 19:10:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:25,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:26,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:26,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403574709] [2022-03-03 19:10:26,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403574709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:26,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418649742] [2022-03-03 19:10:26,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:26,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:26,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:26,017 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) [2022-03-03 19:10:26,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:10:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:26,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:26,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:26,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:26,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:10:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:26,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:26,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:26,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:10:26,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:26,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-03 19:10:26,647 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:26,647 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:26,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418649742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:26,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:26,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-03-03 19:10:26,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300146128] [2022-03-03 19:10:26,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:26,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:26,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:26,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:26,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:26,663 INFO L87 Difference]: Start difference. First operand 433 states and 1324 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:26,869 INFO L93 Difference]: Finished difference Result 698 states and 2022 transitions. [2022-03-03 19:10:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:26,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:26,870 INFO L225 Difference]: With dead ends: 698 [2022-03-03 19:10:26,870 INFO L226 Difference]: Without dead ends: 549 [2022-03-03 19:10:26,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:10:26,870 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:26,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 206 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 471 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-03 19:10:26,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-03-03 19:10:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 424. [2022-03-03 19:10:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0189125295508275) internal successors, (1277), 423 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1277 transitions. [2022-03-03 19:10:26,875 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1277 transitions. Word has length 22 [2022-03-03 19:10:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:26,875 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1277 transitions. [2022-03-03 19:10:26,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1277 transitions. [2022-03-03 19:10:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:26,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:26,876 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] [2022-03-03 19:10:26,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:27,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:27,092 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1579371001, now seen corresponding path program 74 times [2022-03-03 19:10:27,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:27,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990342613] [2022-03-03 19:10:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:27,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:27,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:27,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990342613] [2022-03-03 19:10:27,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990342613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:27,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887919691] [2022-03-03 19:10:27,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:27,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:27,227 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) [2022-03-03 19:10:27,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:10:27,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:27,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:27,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-03-03 19:10:27,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:27,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-03 19:10:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:27,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:27,831 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:27,832 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 7 treesize of output 3 [2022-03-03 19:10:27,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:27,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:10:27,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:27,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:27,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887919691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:27,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:27,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:10:27,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932088166] [2022-03-03 19:10:27,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:27,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:27,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:27,969 INFO L87 Difference]: Start difference. First operand 424 states and 1277 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:28,214 INFO L93 Difference]: Finished difference Result 560 states and 1618 transitions. [2022-03-03 19:10:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:28,215 INFO L225 Difference]: With dead ends: 560 [2022-03-03 19:10:28,215 INFO L226 Difference]: Without dead ends: 439 [2022-03-03 19:10:28,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:10:28,215 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:28,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 240 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 329 Unchecked, 0.1s Time] [2022-03-03 19:10:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-03-03 19:10:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 377. [2022-03-03 19:10:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.00531914893617) internal successors, (1130), 376 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1130 transitions. [2022-03-03 19:10:28,220 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1130 transitions. Word has length 22 [2022-03-03 19:10:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:28,220 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1130 transitions. [2022-03-03 19:10:28,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1130 transitions. [2022-03-03 19:10:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:28,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:28,221 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] [2022-03-03 19:10:28,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:28,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-03 19:10:28,437 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:28,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1091476553, now seen corresponding path program 75 times [2022-03-03 19:10:28,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:28,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051582318] [2022-03-03 19:10:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:28,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:28,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051582318] [2022-03-03 19:10:28,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051582318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:28,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512684768] [2022-03-03 19:10:28,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:28,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:28,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:28,592 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) [2022-03-03 19:10:28,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:10:28,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:10:28,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:28,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:10:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:28,707 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 17 treesize of output 13 [2022-03-03 19:10:28,793 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 187 treesize of output 163 [2022-03-03 19:10:28,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:28,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 153 [2022-03-03 19:10:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:29,219 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 280 treesize of output 252 [2022-03-03 19:10:29,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:29,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:29,387 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 3 treesize of output 1 [2022-03-03 19:10:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:29,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512684768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:29,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:29,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-03-03 19:10:29,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199763937] [2022-03-03 19:10:29,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:10:29,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:10:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:10:29,410 INFO L87 Difference]: Start difference. First operand 377 states and 1130 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:29,579 INFO L93 Difference]: Finished difference Result 564 states and 1652 transitions. [2022-03-03 19:10:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:10:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:29,580 INFO L225 Difference]: With dead ends: 564 [2022-03-03 19:10:29,580 INFO L226 Difference]: Without dead ends: 485 [2022-03-03 19:10:29,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:29,581 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:29,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 114 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 362 Invalid, 0 Unknown, 7 Unchecked, 0.1s Time] [2022-03-03 19:10:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-03 19:10:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 370. [2022-03-03 19:10:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.989159891598916) internal successors, (1103), 369 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1103 transitions. [2022-03-03 19:10:29,585 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1103 transitions. Word has length 22 [2022-03-03 19:10:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:29,585 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1103 transitions. [2022-03-03 19:10:29,585 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) [2022-03-03 19:10:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1103 transitions. [2022-03-03 19:10:29,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:29,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:29,586 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] [2022-03-03 19:10:29,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:29,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:29,799 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1201613417, now seen corresponding path program 76 times [2022-03-03 19:10:29,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:29,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136404927] [2022-03-03 19:10:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:29,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:30,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:30,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136404927] [2022-03-03 19:10:30,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136404927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:30,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953676513] [2022-03-03 19:10:30,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:30,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:30,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:30,030 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) [2022-03-03 19:10:30,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:10:30,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:30,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:30,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:30,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-03 19:10:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:10:30,433 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:10:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:30,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:30,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:30,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:10:30,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:30,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2022-03-03 19:10:30,709 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:30,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:30,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953676513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:30,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:30,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-03 19:10:30,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550661870] [2022-03-03 19:10:30,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:10:30,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:10:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:30,719 INFO L87 Difference]: Start difference. First operand 370 states and 1103 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:31,485 INFO L93 Difference]: Finished difference Result 801 states and 2266 transitions. [2022-03-03 19:10:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:10:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:31,486 INFO L225 Difference]: With dead ends: 801 [2022-03-03 19:10:31,486 INFO L226 Difference]: Without dead ends: 722 [2022-03-03 19:10:31,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=505, Invalid=1945, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:10:31,486 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:31,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 392 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 758 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-03-03 19:10:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-03 19:10:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 380. [2022-03-03 19:10:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 3.0) internal successors, (1137), 379 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1137 transitions. [2022-03-03 19:10:31,492 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1137 transitions. Word has length 22 [2022-03-03 19:10:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:31,492 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 1137 transitions. [2022-03-03 19:10:31,492 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) [2022-03-03 19:10:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1137 transitions. [2022-03-03 19:10:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:31,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:31,493 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] [2022-03-03 19:10:31,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:31,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:31,707 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:31,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1124796341, now seen corresponding path program 77 times [2022-03-03 19:10:31,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:31,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621633694] [2022-03-03 19:10:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:31,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:10:31,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:31,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621633694] [2022-03-03 19:10:31,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621633694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:31,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13413832] [2022-03-03 19:10:31,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:31,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:31,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:31,825 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) [2022-03-03 19:10:31,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:10:31,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:31,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:32,093 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 31 treesize of output 23 [2022-03-03 19:10:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:32,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:32,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:32,283 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 42 treesize of output 40 [2022-03-03 19:10:32,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:32,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:32,376 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:10:32,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:32,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13413832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:32,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:32,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:10:32,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339576854] [2022-03-03 19:10:32,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:32,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:10:32,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:10:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:10:32,388 INFO L87 Difference]: Start difference. First operand 380 states and 1137 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:32,815 INFO L93 Difference]: Finished difference Result 555 states and 1625 transitions. [2022-03-03 19:10:32,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:32,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:32,816 INFO L225 Difference]: With dead ends: 555 [2022-03-03 19:10:32,816 INFO L226 Difference]: Without dead ends: 494 [2022-03-03 19:10:32,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:10:32,816 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:32,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 231 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-03-03 19:10:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 361. [2022-03-03 19:10:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9555555555555557) internal successors, (1064), 360 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1064 transitions. [2022-03-03 19:10:32,821 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1064 transitions. Word has length 22 [2022-03-03 19:10:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:32,821 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1064 transitions. [2022-03-03 19:10:32,821 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) [2022-03-03 19:10:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1064 transitions. [2022-03-03 19:10:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:32,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:32,822 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] [2022-03-03 19:10:32,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:33,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:33,035 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -455195744, now seen corresponding path program 78 times [2022-03-03 19:10:33,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:33,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893643458] [2022-03-03 19:10:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:10:33,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:33,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893643458] [2022-03-03 19:10:33,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893643458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:33,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83872751] [2022-03-03 19:10:33,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:33,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:33,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:33,102 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) [2022-03-03 19:10:33,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:10:33,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:10:33,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:10:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:33,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:10:33,393 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 40 treesize of output 32 [2022-03-03 19:10:33,394 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 17 treesize of output 13 [2022-03-03 19:10:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:10:33,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:33,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:10:33,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:10:33,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:33,557 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 151 treesize of output 141 [2022-03-03 19:10:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:10:33,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83872751] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:33,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:33,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-03-03 19:10:33,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706059796] [2022-03-03 19:10:33,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:33,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:10:33,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:33,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:10:33,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:10:33,802 INFO L87 Difference]: Start difference. First operand 361 states and 1064 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:33,941 INFO L93 Difference]: Finished difference Result 453 states and 1304 transitions. [2022-03-03 19:10:33,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:10:33,941 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 [2022-03-03 19:10:33,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:33,942 INFO L225 Difference]: With dead ends: 453 [2022-03-03 19:10:33,942 INFO L226 Difference]: Without dead ends: 378 [2022-03-03 19:10:33,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:10:33,942 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:33,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 62 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:10:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-03 19:10:33,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 304. [2022-03-03 19:10:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-03 19:10:33,946 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-03 19:10:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:33,946 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-03 19:10:33,946 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) [2022-03-03 19:10:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-03 19:10:33,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:33,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:33,946 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] [2022-03-03 19:10:33,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-03 19:10:34,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-03 19:10:34,153 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1975222629, now seen corresponding path program 79 times [2022-03-03 19:10:34,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:34,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140631068] [2022-03-03 19:10:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:34,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:34,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:34,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140631068] [2022-03-03 19:10:34,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140631068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:34,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233324839] [2022-03-03 19:10:34,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:34,228 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) [2022-03-03 19:10:34,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:10:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:34,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:34,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:34,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:34,635 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:34,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:34,637 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 [2022-03-03 19:10:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:34,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233324839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:34,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:34,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:10:34,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281691987] [2022-03-03 19:10:34,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:34,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:10:34,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:10:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:10:34,642 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:35,035 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2022-03-03 19:10:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:10:35,035 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 [2022-03-03 19:10:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:35,036 INFO L225 Difference]: With dead ends: 485 [2022-03-03 19:10:35,036 INFO L226 Difference]: Without dead ends: 485 [2022-03-03 19:10:35,036 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 [2022-03-03 19:10:35,036 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:35,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 248 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-03 19:10:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2022-03-03 19:10:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-03-03 19:10:35,041 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-03-03 19:10:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:35,041 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-03-03 19:10:35,041 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) [2022-03-03 19:10:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-03-03 19:10:35,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:35,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:35,041 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] [2022-03-03 19:10:35,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 19:10:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-03 19:10:35,242 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash -260222965, now seen corresponding path program 80 times [2022-03-03 19:10:35,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:35,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714845118] [2022-03-03 19:10:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:35,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:35,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:35,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714845118] [2022-03-03 19:10:35,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714845118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:35,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222747671] [2022-03-03 19:10:35,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:35,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:35,320 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) [2022-03-03 19:10:35,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:10:35,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:35,603 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 [2022-03-03 19:10:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:35,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:35,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:35,825 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 13 treesize of output 17 [2022-03-03 19:10:35,882 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:35,882 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 [2022-03-03 19:10:35,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:35,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222747671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:35,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:35,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:35,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447736989] [2022-03-03 19:10:35,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:35,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:35,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:35,890 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:36,319 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2022-03-03 19:10:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:10:36,319 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 [2022-03-03 19:10:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:36,320 INFO L225 Difference]: With dead ends: 594 [2022-03-03 19:10:36,320 INFO L226 Difference]: Without dead ends: 594 [2022-03-03 19:10:36,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=738, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:10:36,321 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:36,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 233 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-03 19:10:36,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2022-03-03 19:10:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2022-03-03 19:10:36,325 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2022-03-03 19:10:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:36,325 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2022-03-03 19:10:36,325 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) [2022-03-03 19:10:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2022-03-03 19:10:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:36,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:36,326 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] [2022-03-03 19:10:36,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:36,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-03 19:10:36,542 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:36,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:36,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1234379999, now seen corresponding path program 81 times [2022-03-03 19:10:36,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:36,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120369932] [2022-03-03 19:10:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:36,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:36,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:36,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120369932] [2022-03-03 19:10:36,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120369932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:36,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728107659] [2022-03-03 19:10:36,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:36,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:36,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:36,648 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) [2022-03-03 19:10:36,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:10:36,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:10:36,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:36,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:36,925 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 20 treesize of output 14 [2022-03-03 19:10:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:36,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:37,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:37,137 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 13 treesize of output 17 [2022-03-03 19:10:37,200 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:37,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:37,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:37,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728107659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:37,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:37,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:10:37,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510625173] [2022-03-03 19:10:37,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:37,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:37,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:37,207 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:37,563 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2022-03-03 19:10:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:37,563 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 [2022-03-03 19:10:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:37,564 INFO L225 Difference]: With dead ends: 573 [2022-03-03 19:10:37,564 INFO L226 Difference]: Without dead ends: 563 [2022-03-03 19:10:37,565 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 [2022-03-03 19:10:37,565 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 226 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:37,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 193 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-03 19:10:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2022-03-03 19:10:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2022-03-03 19:10:37,569 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2022-03-03 19:10:37,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:37,569 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2022-03-03 19:10:37,569 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) [2022-03-03 19:10:37,569 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2022-03-03 19:10:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:37,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:37,570 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] [2022-03-03 19:10:37,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:37,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-03 19:10:37,770 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash 915267679, now seen corresponding path program 82 times [2022-03-03 19:10:37,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:37,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758716322] [2022-03-03 19:10:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:37,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:37,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:37,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758716322] [2022-03-03 19:10:37,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758716322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:37,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136884625] [2022-03-03 19:10:37,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:37,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:37,831 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) [2022-03-03 19:10:37,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 19:10:37,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:37,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:37,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:38,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:38,251 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:38,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:38,301 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:38,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:38,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:38,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136884625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:38,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:38,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:38,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599959661] [2022-03-03 19:10:38,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:38,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:38,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:38,308 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:38,717 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2022-03-03 19:10:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:38,717 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 [2022-03-03 19:10:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:38,718 INFO L225 Difference]: With dead ends: 506 [2022-03-03 19:10:38,718 INFO L226 Difference]: Without dead ends: 506 [2022-03-03 19:10:38,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:10:38,718 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:38,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 252 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-03 19:10:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2022-03-03 19:10:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-03-03 19:10:38,722 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-03-03 19:10:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:38,723 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-03-03 19:10:38,723 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) [2022-03-03 19:10:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-03-03 19:10:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:38,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:38,723 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] [2022-03-03 19:10:38,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:38,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:38,927 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:38,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1143347419, now seen corresponding path program 83 times [2022-03-03 19:10:38,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:38,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126006917] [2022-03-03 19:10:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:38,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:39,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:39,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126006917] [2022-03-03 19:10:39,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126006917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:39,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923049273] [2022-03-03 19:10:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:39,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:39,004 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) [2022-03-03 19:10:39,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 19:10:39,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:39,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:39,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:39,264 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 31 treesize of output 23 [2022-03-03 19:10:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:39,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:39,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:39,433 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 42 treesize of output 40 [2022-03-03 19:10:39,543 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:39,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:39,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:39,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923049273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:39,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:39,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:10:39,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236668560] [2022-03-03 19:10:39,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:39,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:39,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:39,549 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:39,882 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2022-03-03 19:10:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:10:39,882 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 [2022-03-03 19:10:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:39,883 INFO L225 Difference]: With dead ends: 458 [2022-03-03 19:10:39,883 INFO L226 Difference]: Without dead ends: 458 [2022-03-03 19:10:39,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=848, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:10:39,883 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:39,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 151 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-03 19:10:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2022-03-03 19:10:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2022-03-03 19:10:39,903 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2022-03-03 19:10:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:39,919 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2022-03-03 19:10:39,919 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) [2022-03-03 19:10:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2022-03-03 19:10:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:39,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:39,920 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] [2022-03-03 19:10:39,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:40,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-03 19:10:40,136 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash 351255545, now seen corresponding path program 84 times [2022-03-03 19:10:40,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:40,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459081670] [2022-03-03 19:10:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:40,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:40,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459081670] [2022-03-03 19:10:40,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459081670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:40,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930640364] [2022-03-03 19:10:40,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:40,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:40,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:40,212 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) [2022-03-03 19:10:40,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 19:10:40,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:10:40,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:40,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:40,421 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 31 treesize of output 23 [2022-03-03 19:10:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:40,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:40,509 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 47 treesize of output 45 [2022-03-03 19:10:40,656 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:40,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:40,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:40,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930640364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:40,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:40,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:40,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931505845] [2022-03-03 19:10:40,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:40,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:40,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:40,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:40,664 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:41,021 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2022-03-03 19:10:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:41,021 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 [2022-03-03 19:10:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:41,022 INFO L225 Difference]: With dead ends: 475 [2022-03-03 19:10:41,022 INFO L226 Difference]: Without dead ends: 465 [2022-03-03 19:10:41,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:10:41,022 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 176 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:41,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 174 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-03 19:10:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2022-03-03 19:10:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2022-03-03 19:10:41,026 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2022-03-03 19:10:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:41,026 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2022-03-03 19:10:41,026 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) [2022-03-03 19:10:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2022-03-03 19:10:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:41,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:41,027 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] [2022-03-03 19:10:41,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:41,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-03 19:10:41,234 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:41,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 776202755, now seen corresponding path program 85 times [2022-03-03 19:10:41,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:41,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020542983] [2022-03-03 19:10:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:41,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:41,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020542983] [2022-03-03 19:10:41,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020542983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:41,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937144622] [2022-03-03 19:10:41,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:41,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:41,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:41,319 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) [2022-03-03 19:10:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 19:10:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:41,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:41,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:41,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:41,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:41,678 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 47 treesize of output 45 [2022-03-03 19:10:41,832 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:41,832 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 8 treesize of output 7 [2022-03-03 19:10:41,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:41,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937144622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:41,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:41,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:41,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330314383] [2022-03-03 19:10:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:41,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:41,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:41,839 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:42,181 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-03-03 19:10:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:42,182 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 [2022-03-03 19:10:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:42,182 INFO L225 Difference]: With dead ends: 429 [2022-03-03 19:10:42,182 INFO L226 Difference]: Without dead ends: 409 [2022-03-03 19:10:42,182 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 [2022-03-03 19:10:42,182 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:42,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 232 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-03-03 19:10:42,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 322. [2022-03-03 19:10:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2022-03-03 19:10:42,186 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2022-03-03 19:10:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:42,186 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2022-03-03 19:10:42,186 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) [2022-03-03 19:10:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2022-03-03 19:10:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:42,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:42,187 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] [2022-03-03 19:10:42,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:42,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 19:10:42,388 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:42,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:42,389 INFO L85 PathProgramCache]: Analyzing trace with hash 937124177, now seen corresponding path program 86 times [2022-03-03 19:10:42,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:42,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606528867] [2022-03-03 19:10:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:42,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:42,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606528867] [2022-03-03 19:10:42,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606528867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:42,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804577404] [2022-03-03 19:10:42,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:42,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:42,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:42,500 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) [2022-03-03 19:10:42,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 19:10:42,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:42,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:42,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:42,725 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 20 treesize of output 14 [2022-03-03 19:10:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:42,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:42,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:42,902 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 18 treesize of output 22 [2022-03-03 19:10:42,983 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:42,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:42,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:10:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:42,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804577404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:42,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:42,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:10:42,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082508072] [2022-03-03 19:10:42,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:42,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:42,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:43,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:43,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:43,011 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:43,350 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2022-03-03 19:10:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:10:43,350 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 [2022-03-03 19:10:43,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:43,351 INFO L225 Difference]: With dead ends: 488 [2022-03-03 19:10:43,351 INFO L226 Difference]: Without dead ends: 488 [2022-03-03 19:10:43,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:43,351 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 207 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:43,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 218 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-03 19:10:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2022-03-03 19:10:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2022-03-03 19:10:43,355 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2022-03-03 19:10:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:43,355 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2022-03-03 19:10:43,355 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) [2022-03-03 19:10:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2022-03-03 19:10:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:43,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:43,356 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] [2022-03-03 19:10:43,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:43,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:43,572 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1863240155, now seen corresponding path program 87 times [2022-03-03 19:10:43,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:43,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36811946] [2022-03-03 19:10:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:43,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:43,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:43,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36811946] [2022-03-03 19:10:43,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36811946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:43,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472953405] [2022-03-03 19:10:43,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:43,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:43,648 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) [2022-03-03 19:10:43,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 19:10:43,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:10:43,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:43,902 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 20 treesize of output 14 [2022-03-03 19:10:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:44,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:44,081 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 18 treesize of output 22 [2022-03-03 19:10:44,167 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:44,167 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 [2022-03-03 19:10:44,169 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 [2022-03-03 19:10:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:44,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472953405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:44,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:44,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:44,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170500759] [2022-03-03 19:10:44,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:44,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:44,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:44,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:44,174 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:44,412 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2022-03-03 19:10:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:10:44,413 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 [2022-03-03 19:10:44,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:44,413 INFO L225 Difference]: With dead ends: 473 [2022-03-03 19:10:44,413 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 19:10:44,413 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 [2022-03-03 19:10:44,414 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 118 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:44,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 227 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 19:10:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2022-03-03 19:10:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:44,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2022-03-03 19:10:44,418 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2022-03-03 19:10:44,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:44,418 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2022-03-03 19:10:44,418 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) [2022-03-03 19:10:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2022-03-03 19:10:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:44,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:44,419 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] [2022-03-03 19:10:44,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:44,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-03 19:10:44,635 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:44,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2112614821, now seen corresponding path program 88 times [2022-03-03 19:10:44,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:44,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676696805] [2022-03-03 19:10:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:44,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:44,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:44,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676696805] [2022-03-03 19:10:44,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676696805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:44,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542800990] [2022-03-03 19:10:44,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:44,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:44,690 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) [2022-03-03 19:10:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 19:10:44,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:44,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:44,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:44,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:45,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:45,027 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 18 treesize of output 22 [2022-03-03 19:10:45,079 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:45,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:45,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:45,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542800990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:45,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:45,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:10:45,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782954489] [2022-03-03 19:10:45,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:45,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:45,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:45,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:45,084 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:45,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:45,302 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2022-03-03 19:10:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:45,302 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 [2022-03-03 19:10:45,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:45,303 INFO L225 Difference]: With dead ends: 400 [2022-03-03 19:10:45,303 INFO L226 Difference]: Without dead ends: 400 [2022-03-03 19:10:45,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:10:45,315 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:45,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 195 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-03 19:10:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2022-03-03 19:10:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2022-03-03 19:10:45,319 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2022-03-03 19:10:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:45,319 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2022-03-03 19:10:45,319 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) [2022-03-03 19:10:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2022-03-03 19:10:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:45,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:45,320 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] [2022-03-03 19:10:45,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:45,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-03 19:10:45,536 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash -359358453, now seen corresponding path program 89 times [2022-03-03 19:10:45,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:45,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171013439] [2022-03-03 19:10:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:45,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:45,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:45,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171013439] [2022-03-03 19:10:45,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171013439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:45,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452164081] [2022-03-03 19:10:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:45,596 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) [2022-03-03 19:10:45,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 19:10:45,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:45,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:45,828 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 31 treesize of output 23 [2022-03-03 19:10:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:45,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:45,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:45,934 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 42 treesize of output 40 [2022-03-03 19:10:46,006 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:46,006 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:46,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:46,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452164081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:46,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:46,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:10:46,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783210608] [2022-03-03 19:10:46,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:46,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:46,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:46,011 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:46,268 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2022-03-03 19:10:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:46,269 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 [2022-03-03 19:10:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:46,269 INFO L225 Difference]: With dead ends: 563 [2022-03-03 19:10:46,269 INFO L226 Difference]: Without dead ends: 563 [2022-03-03 19:10:46,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:46,270 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:46,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 225 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-03-03 19:10:46,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2022-03-03 19:10:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2022-03-03 19:10:46,289 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2022-03-03 19:10:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:46,289 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2022-03-03 19:10:46,290 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) [2022-03-03 19:10:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2022-03-03 19:10:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:46,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:46,290 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] [2022-03-03 19:10:46,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:46,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-03 19:10:46,506 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1135244511, now seen corresponding path program 90 times [2022-03-03 19:10:46,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:46,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535162193] [2022-03-03 19:10:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:46,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:46,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:46,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535162193] [2022-03-03 19:10:46,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535162193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:46,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674964096] [2022-03-03 19:10:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:46,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:46,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:46,551 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) [2022-03-03 19:10:46,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 19:10:46,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:10:46,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:46,761 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 31 treesize of output 23 [2022-03-03 19:10:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:46,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:46,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:46,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:46,977 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:46,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:46,979 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 [2022-03-03 19:10:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:46,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674964096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:46,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:46,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:46,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330529358] [2022-03-03 19:10:46,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:46,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:46,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:46,983 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:47,476 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2022-03-03 19:10:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:10:47,477 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 [2022-03-03 19:10:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:47,477 INFO L225 Difference]: With dead ends: 595 [2022-03-03 19:10:47,477 INFO L226 Difference]: Without dead ends: 585 [2022-03-03 19:10:47,478 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 [2022-03-03 19:10:47,478 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:47,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 225 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-03 19:10:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2022-03-03 19:10:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2022-03-03 19:10:47,482 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2022-03-03 19:10:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:47,482 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2022-03-03 19:10:47,482 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) [2022-03-03 19:10:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2022-03-03 19:10:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:47,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:47,483 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] [2022-03-03 19:10:47,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:47,699 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1560191721, now seen corresponding path program 91 times [2022-03-03 19:10:47,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:47,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420515710] [2022-03-03 19:10:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:47,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:47,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420515710] [2022-03-03 19:10:47,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420515710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:47,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434287837] [2022-03-03 19:10:47,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:47,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:47,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:47,781 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) [2022-03-03 19:10:47,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 19:10:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:47,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:47,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:48,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:48,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:48,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:48,309 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:48,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:48,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:48,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434287837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:48,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:48,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:48,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030852640] [2022-03-03 19:10:48,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:48,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:48,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:48,315 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:48,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:48,611 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2022-03-03 19:10:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:10:48,611 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 [2022-03-03 19:10:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:48,612 INFO L225 Difference]: With dead ends: 572 [2022-03-03 19:10:48,612 INFO L226 Difference]: Without dead ends: 552 [2022-03-03 19:10:48,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:10:48,612 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 146 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:48,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 245 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:48,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-03-03 19:10:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2022-03-03 19:10:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2022-03-03 19:10:48,616 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2022-03-03 19:10:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:48,617 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2022-03-03 19:10:48,617 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) [2022-03-03 19:10:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2022-03-03 19:10:48,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:48,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:48,617 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] [2022-03-03 19:10:48,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:48,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:48,833 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:48,833 INFO L85 PathProgramCache]: Analyzing trace with hash -963179015, now seen corresponding path program 92 times [2022-03-03 19:10:48,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:48,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125415076] [2022-03-03 19:10:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:48,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:48,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:48,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125415076] [2022-03-03 19:10:48,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125415076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:48,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758747138] [2022-03-03 19:10:48,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:48,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:48,886 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) [2022-03-03 19:10:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 19:10:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:48,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:49,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:49,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:49,141 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 [2022-03-03 19:10:49,223 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:49,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:49,225 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 [2022-03-03 19:10:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:49,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758747138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:49,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:49,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:49,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824552714] [2022-03-03 19:10:49,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:49,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:49,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:49,228 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:49,505 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2022-03-03 19:10:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:10:49,505 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 [2022-03-03 19:10:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:49,506 INFO L225 Difference]: With dead ends: 515 [2022-03-03 19:10:49,506 INFO L226 Difference]: Without dead ends: 479 [2022-03-03 19:10:49,506 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 [2022-03-03 19:10:49,506 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 151 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:49,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 278 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-03 19:10:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2022-03-03 19:10:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2022-03-03 19:10:49,510 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2022-03-03 19:10:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:49,510 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2022-03-03 19:10:49,510 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) [2022-03-03 19:10:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2022-03-03 19:10:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:49,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:49,518 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] [2022-03-03 19:10:49,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:49,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:49,734 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:49,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash 978208761, now seen corresponding path program 93 times [2022-03-03 19:10:49,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:49,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111129037] [2022-03-03 19:10:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:49,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:49,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:49,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111129037] [2022-03-03 19:10:49,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111129037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:49,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146979810] [2022-03-03 19:10:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:49,815 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) [2022-03-03 19:10:49,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 19:10:49,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:10:49,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:10:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:49,939 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 17 treesize of output 13 [2022-03-03 19:10:50,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-03-03 19:10:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:50,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:50,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 254 [2022-03-03 19:10:50,444 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:50,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:50,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:10:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:10:50,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146979810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:50,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:50,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-03 19:10:50,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146482494] [2022-03-03 19:10:50,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:50,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:10:50,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:50,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:10:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:10:50,450 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:50,782 INFO L93 Difference]: Finished difference Result 546 states and 1595 transitions. [2022-03-03 19:10:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:10:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:10:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:50,783 INFO L225 Difference]: With dead ends: 546 [2022-03-03 19:10:50,783 INFO L226 Difference]: Without dead ends: 444 [2022-03-03 19:10:50,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:10:50,784 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:50,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 204 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-03-03 19:10:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 304. [2022-03-03 19:10:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-03 19:10:50,803 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-03 19:10:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:50,803 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-03 19:10:50,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-03 19:10:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:50,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:50,803 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] [2022-03-03 19:10:50,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:51,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-03 19:10:51,021 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:51,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2067370929, now seen corresponding path program 94 times [2022-03-03 19:10:51,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:51,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868141323] [2022-03-03 19:10:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:51,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:51,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868141323] [2022-03-03 19:10:51,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868141323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:51,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209947356] [2022-03-03 19:10:51,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:51,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:51,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:51,129 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) [2022-03-03 19:10:51,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 19:10:51,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:51,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:51,305 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 29 treesize of output 23 [2022-03-03 19:10:51,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:10:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:51,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:51,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:51,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:10:51,643 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:51,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:51,645 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 [2022-03-03 19:10:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:51,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209947356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:51,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:51,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:10:51,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517113169] [2022-03-03 19:10:51,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:51,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:51,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:51,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:51,650 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:52,291 INFO L93 Difference]: Finished difference Result 708 states and 2027 transitions. [2022-03-03 19:10:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:10:52,291 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 [2022-03-03 19:10:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:52,319 INFO L225 Difference]: With dead ends: 708 [2022-03-03 19:10:52,319 INFO L226 Difference]: Without dead ends: 708 [2022-03-03 19:10:52,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:10:52,319 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 205 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:52,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 274 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:10:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-03-03 19:10:52,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 321. [2022-03-03 19:10:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.984375) internal successors, (955), 320 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 955 transitions. [2022-03-03 19:10:52,324 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 955 transitions. Word has length 22 [2022-03-03 19:10:52,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:52,324 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 955 transitions. [2022-03-03 19:10:52,324 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) [2022-03-03 19:10:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 955 transitions. [2022-03-03 19:10:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:52,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:52,325 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] [2022-03-03 19:10:52,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:52,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-03 19:10:52,531 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:52,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1697886599, now seen corresponding path program 95 times [2022-03-03 19:10:52,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:52,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177682660] [2022-03-03 19:10:52,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:52,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:52,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:52,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177682660] [2022-03-03 19:10:52,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177682660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:52,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136763840] [2022-03-03 19:10:52,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:10:52,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:52,618 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) [2022-03-03 19:10:52,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 19:10:52,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:10:52,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:52,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:52,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:52,802 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 29 treesize of output 23 [2022-03-03 19:10:52,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:10:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:52,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:53,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:53,028 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 13 treesize of output 17 [2022-03-03 19:10:53,059 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:53,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:53,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:53,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136763840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:53,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:53,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:10:53,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411627248] [2022-03-03 19:10:53,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:10:53,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:10:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:10:53,065 INFO L87 Difference]: Start difference. First operand 321 states and 955 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:53,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:53,436 INFO L93 Difference]: Finished difference Result 618 states and 1796 transitions. [2022-03-03 19:10:53,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:53,437 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 [2022-03-03 19:10:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:53,438 INFO L225 Difference]: With dead ends: 618 [2022-03-03 19:10:53,438 INFO L226 Difference]: Without dead ends: 609 [2022-03-03 19:10:53,438 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 [2022-03-03 19:10:53,438 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 166 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:53,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 200 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-03 19:10:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 327. [2022-03-03 19:10:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9662576687116564) internal successors, (967), 326 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 967 transitions. [2022-03-03 19:10:53,443 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 967 transitions. Word has length 22 [2022-03-03 19:10:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 967 transitions. [2022-03-03 19:10:53,444 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) [2022-03-03 19:10:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 967 transitions. [2022-03-03 19:10:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:53,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:53,444 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] [2022-03-03 19:10:53,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:53,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-03 19:10:53,649 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1479625607, now seen corresponding path program 96 times [2022-03-03 19:10:53,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:53,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926647030] [2022-03-03 19:10:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:53,739 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:53,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926647030] [2022-03-03 19:10:53,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926647030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:53,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552255259] [2022-03-03 19:10:53,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:10:53,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:53,740 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) [2022-03-03 19:10:53,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 19:10:53,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:10:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:53,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:10:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:54,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:54,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:54,268 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 13 treesize of output 17 [2022-03-03 19:10:54,308 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:54,308 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 [2022-03-03 19:10:54,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:54,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552255259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:54,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:54,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:10:54,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835556986] [2022-03-03 19:10:54,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:54,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:54,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:54,316 INFO L87 Difference]: Start difference. First operand 327 states and 967 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:54,624 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2022-03-03 19:10:54,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:10:54,625 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 [2022-03-03 19:10:54,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:54,625 INFO L225 Difference]: With dead ends: 546 [2022-03-03 19:10:54,625 INFO L226 Difference]: Without dead ends: 546 [2022-03-03 19:10:54,625 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 [2022-03-03 19:10:54,626 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 148 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:54,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 229 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-03-03 19:10:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 309. [2022-03-03 19:10:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-03-03 19:10:54,630 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-03-03 19:10:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:54,630 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-03-03 19:10:54,630 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) [2022-03-03 19:10:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-03-03 19:10:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:54,630 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:54,630 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] [2022-03-03 19:10:54,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 19:10:54,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-03 19:10:54,831 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash -553534529, now seen corresponding path program 97 times [2022-03-03 19:10:54,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:54,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468354453] [2022-03-03 19:10:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:54,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:54,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468354453] [2022-03-03 19:10:54,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468354453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:54,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609736031] [2022-03-03 19:10:54,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:10:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:54,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:54,921 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) [2022-03-03 19:10:54,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 19:10:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:55,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:10:55,134 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 60 treesize of output 48 [2022-03-03 19:10:55,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-03 19:10:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:55,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:55,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:55,312 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 13 treesize of output 17 [2022-03-03 19:10:55,337 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:55,337 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 8 treesize of output 7 [2022-03-03 19:10:55,339 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 [2022-03-03 19:10:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:55,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609736031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:55,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:55,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:55,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168746342] [2022-03-03 19:10:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:55,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:55,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:55,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:55,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:55,342 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:55,920 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2022-03-03 19:10:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:10:55,920 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 [2022-03-03 19:10:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:55,921 INFO L225 Difference]: With dead ends: 733 [2022-03-03 19:10:55,921 INFO L226 Difference]: Without dead ends: 733 [2022-03-03 19:10:55,921 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 [2022-03-03 19:10:55,921 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 228 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:55,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 196 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-03 19:10:55,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 323. [2022-03-03 19:10:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.012422360248447) internal successors, (970), 322 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 970 transitions. [2022-03-03 19:10:55,927 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 970 transitions. Word has length 22 [2022-03-03 19:10:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:55,927 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 970 transitions. [2022-03-03 19:10:55,927 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) [2022-03-03 19:10:55,927 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 970 transitions. [2022-03-03 19:10:55,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:55,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:55,927 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] [2022-03-03 19:10:55,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-03 19:10:56,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-03 19:10:56,139 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash 941068435, now seen corresponding path program 98 times [2022-03-03 19:10:56,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:56,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401711095] [2022-03-03 19:10:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:56,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:56,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:56,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401711095] [2022-03-03 19:10:56,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401711095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:56,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415795903] [2022-03-03 19:10:56,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:10:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:56,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:56,231 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) [2022-03-03 19:10:56,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 19:10:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:10:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:56,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:56,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:56,412 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 29 treesize of output 23 [2022-03-03 19:10:56,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-03 19:10:56,514 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 52 treesize of output 42 [2022-03-03 19:10:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:56,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:56,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:56,730 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 13 treesize of output 17 [2022-03-03 19:10:56,761 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:56,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:56,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:56,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415795903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:56,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:56,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:10:56,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229959659] [2022-03-03 19:10:56,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:56,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:10:56,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:10:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:10:56,769 INFO L87 Difference]: Start difference. First operand 323 states and 970 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:57,165 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2022-03-03 19:10:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:10:57,166 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 [2022-03-03 19:10:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:57,167 INFO L225 Difference]: With dead ends: 767 [2022-03-03 19:10:57,167 INFO L226 Difference]: Without dead ends: 757 [2022-03-03 19:10:57,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:10:57,167 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 255 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:57,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 154 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-03 19:10:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 330. [2022-03-03 19:10:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2022-03-03 19:10:57,172 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 22 [2022-03-03 19:10:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:57,172 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2022-03-03 19:10:57,172 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) [2022-03-03 19:10:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2022-03-03 19:10:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:57,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:57,172 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] [2022-03-03 19:10:57,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-03 19:10:57,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:57,387 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1982143627, now seen corresponding path program 99 times [2022-03-03 19:10:57,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:57,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808361609] [2022-03-03 19:10:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:57,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:57,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808361609] [2022-03-03 19:10:57,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808361609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:57,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996104813] [2022-03-03 19:10:57,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:10:57,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:57,462 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) [2022-03-03 19:10:57,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 19:10:57,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:10:57,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:57,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:57,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:57,622 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 29 treesize of output 23 [2022-03-03 19:10:57,696 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 59 treesize of output 47 [2022-03-03 19:10:57,698 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 51 treesize of output 41 [2022-03-03 19:10:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:57,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:57,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:57,887 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 13 treesize of output 17 [2022-03-03 19:10:57,913 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:57,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:57,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:10:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:57,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996104813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:57,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:57,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:10:57,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826677746] [2022-03-03 19:10:57,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:57,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:10:57,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:10:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:10:57,918 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:58,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:58,341 INFO L93 Difference]: Finished difference Result 820 states and 2355 transitions. [2022-03-03 19:10:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:10:58,341 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 [2022-03-03 19:10:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:58,342 INFO L225 Difference]: With dead ends: 820 [2022-03-03 19:10:58,342 INFO L226 Difference]: Without dead ends: 820 [2022-03-03 19:10:58,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=932, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:10:58,342 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 254 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:58,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 194 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-03-03 19:10:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 336. [2022-03-03 19:10:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.017910447761194) internal successors, (1011), 335 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1011 transitions. [2022-03-03 19:10:58,347 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1011 transitions. Word has length 22 [2022-03-03 19:10:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:58,347 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1011 transitions. [2022-03-03 19:10:58,347 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) [2022-03-03 19:10:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1011 transitions. [2022-03-03 19:10:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:58,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:58,348 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] [2022-03-03 19:10:58,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-03 19:10:58,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:58,564 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -94685677, now seen corresponding path program 100 times [2022-03-03 19:10:58,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:58,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640799925] [2022-03-03 19:10:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:58,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:10:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:58,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:10:58,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640799925] [2022-03-03 19:10:58,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640799925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:10:58,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44737078] [2022-03-03 19:10:58,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:10:58,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:10:58,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:10:58,657 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) [2022-03-03 19:10:58,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 19:10:58,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:10:58,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:10:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:10:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:10:58,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:10:58,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-03 19:10:58,955 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 51 treesize of output 41 [2022-03-03 19:10:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:10:59,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:10:59,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:10:59,244 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:10:59,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:10:59,246 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 [2022-03-03 19:10:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:10:59,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44737078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:10:59,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:10:59,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:10:59,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796029648] [2022-03-03 19:10:59,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:10:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:10:59,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:10:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:10:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:10:59,250 INFO L87 Difference]: Start difference. First operand 336 states and 1011 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:10:59,748 INFO L93 Difference]: Finished difference Result 769 states and 2220 transitions. [2022-03-03 19:10:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:10:59,748 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 [2022-03-03 19:10:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:10:59,749 INFO L225 Difference]: With dead ends: 769 [2022-03-03 19:10:59,750 INFO L226 Difference]: Without dead ends: 760 [2022-03-03 19:10:59,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:10:59,750 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 243 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:10:59,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 184 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:10:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-03-03 19:10:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 342. [2022-03-03 19:10:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0) internal successors, (1023), 341 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:10:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1023 transitions. [2022-03-03 19:10:59,755 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1023 transitions. Word has length 22 [2022-03-03 19:10:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:10:59,755 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 1023 transitions. [2022-03-03 19:10:59,755 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) [2022-03-03 19:10:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1023 transitions. [2022-03-03 19:10:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:10:59,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:10:59,755 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] [2022-03-03 19:10:59,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-03 19:10:59,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-03 19:10:59,971 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:10:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:10:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash 247563817, now seen corresponding path program 101 times [2022-03-03 19:10:59,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:10:59,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223955611] [2022-03-03 19:10:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:10:59,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:10:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:00,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:00,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223955611] [2022-03-03 19:11:00,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223955611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:00,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088488803] [2022-03-03 19:11:00,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:00,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:00,065 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) [2022-03-03 19:11:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 19:11:00,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:11:00,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:00,250 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 29 treesize of output 23 [2022-03-03 19:11:00,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-03 19:11:00,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-03 19:11:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:00,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:00,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:00,562 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 13 treesize of output 17 [2022-03-03 19:11:00,595 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:00,595 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 [2022-03-03 19:11:00,597 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 [2022-03-03 19:11:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:00,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088488803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:00,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:00,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:11:00,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445756972] [2022-03-03 19:11:00,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:00,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:11:00,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:11:00,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:11:00,601 INFO L87 Difference]: Start difference. First operand 342 states and 1023 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:01,145 INFO L93 Difference]: Finished difference Result 812 states and 2302 transitions. [2022-03-03 19:11:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:11:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:01,146 INFO L225 Difference]: With dead ends: 812 [2022-03-03 19:11:01,147 INFO L226 Difference]: Without dead ends: 802 [2022-03-03 19:11:01,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:01,147 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 193 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:01,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 225 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-03 19:11:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 354. [2022-03-03 19:11:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0056657223796033) internal successors, (1061), 353 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1061 transitions. [2022-03-03 19:11:01,152 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1061 transitions. Word has length 22 [2022-03-03 19:11:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1061 transitions. [2022-03-03 19:11:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1061 transitions. [2022-03-03 19:11:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:01,153 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:01,153 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] [2022-03-03 19:11:01,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:01,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-03 19:11:01,353 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1333208099, now seen corresponding path program 102 times [2022-03-03 19:11:01,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:01,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594855773] [2022-03-03 19:11:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:01,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:01,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594855773] [2022-03-03 19:11:01,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594855773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:01,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143611930] [2022-03-03 19:11:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:01,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:01,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:01,431 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) [2022-03-03 19:11:01,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 19:11:01,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:11:01,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:01,640 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 29 treesize of output 23 [2022-03-03 19:11:01,739 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 59 treesize of output 47 [2022-03-03 19:11:01,741 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 51 treesize of output 41 [2022-03-03 19:11:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:01,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:01,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:01,932 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 13 treesize of output 17 [2022-03-03 19:11:01,964 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:01,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:01,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:11:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:01,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143611930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:01,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:01,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-03 19:11:01,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632895521] [2022-03-03 19:11:01,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:01,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-03 19:11:01,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-03 19:11:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-03 19:11:01,970 INFO L87 Difference]: Start difference. First operand 354 states and 1061 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:02,363 INFO L93 Difference]: Finished difference Result 726 states and 2094 transitions. [2022-03-03 19:11:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:02,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:11:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:02,364 INFO L225 Difference]: With dead ends: 726 [2022-03-03 19:11:02,364 INFO L226 Difference]: Without dead ends: 714 [2022-03-03 19:11:02,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:11:02,364 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 237 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:02,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 148 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-03 19:11:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 350. [2022-03-03 19:11:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 3.005730659025788) internal successors, (1049), 349 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1049 transitions. [2022-03-03 19:11:02,390 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1049 transitions. Word has length 22 [2022-03-03 19:11:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:02,390 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1049 transitions. [2022-03-03 19:11:02,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1049 transitions. [2022-03-03 19:11:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:02,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:02,390 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] [2022-03-03 19:11:02,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-03 19:11:02,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:02,599 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1614312619, now seen corresponding path program 103 times [2022-03-03 19:11:02,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:02,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705716718] [2022-03-03 19:11:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:02,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:02,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705716718] [2022-03-03 19:11:02,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705716718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:02,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251443759] [2022-03-03 19:11:02,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:02,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:02,679 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) [2022-03-03 19:11:02,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 19:11:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:02,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:02,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:02,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-03-03 19:11:02,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:02,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:03,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:03,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:11:03,085 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:03,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:03,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:03,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251443759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:03,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:03,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:03,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424468107] [2022-03-03 19:11:03,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:03,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:03,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:03,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:03,090 INFO L87 Difference]: Start difference. First operand 350 states and 1049 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:03,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:03,416 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2022-03-03 19:11:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:03,416 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 [2022-03-03 19:11:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:03,417 INFO L225 Difference]: With dead ends: 689 [2022-03-03 19:11:03,417 INFO L226 Difference]: Without dead ends: 689 [2022-03-03 19:11:03,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:11:03,418 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 170 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:03,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 195 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-03-03 19:11:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 355. [2022-03-03 19:11:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.0) internal successors, (1062), 354 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1062 transitions. [2022-03-03 19:11:03,423 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1062 transitions. Word has length 22 [2022-03-03 19:11:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:03,423 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1062 transitions. [2022-03-03 19:11:03,423 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) [2022-03-03 19:11:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1062 transitions. [2022-03-03 19:11:03,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:03,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:03,423 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] [2022-03-03 19:11:03,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-03 19:11:03,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:03,640 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:03,640 INFO L85 PathProgramCache]: Analyzing trace with hash -119709655, now seen corresponding path program 104 times [2022-03-03 19:11:03,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:03,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034997551] [2022-03-03 19:11:03,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:03,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:03,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:03,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034997551] [2022-03-03 19:11:03,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034997551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:03,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805105285] [2022-03-03 19:11:03,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:03,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:03,705 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) [2022-03-03 19:11:03,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 19:11:03,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:03,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:03,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:03,986 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 55 treesize of output 45 [2022-03-03 19:11:03,987 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 49 treesize of output 37 [2022-03-03 19:11:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:04,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:04,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:04,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:11:04,164 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:04,165 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:04,166 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 [2022-03-03 19:11:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:04,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805105285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:04,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:04,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:11:04,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354573898] [2022-03-03 19:11:04,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:04,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:11:04,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:11:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:11:04,169 INFO L87 Difference]: Start difference. First operand 355 states and 1062 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:04,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:04,442 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2022-03-03 19:11:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:04,443 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 [2022-03-03 19:11:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:04,443 INFO L225 Difference]: With dead ends: 680 [2022-03-03 19:11:04,443 INFO L226 Difference]: Without dead ends: 670 [2022-03-03 19:11:04,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:04,444 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:04,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 195 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-03-03 19:11:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 334. [2022-03-03 19:11:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.96996996996997) internal successors, (989), 333 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 989 transitions. [2022-03-03 19:11:04,448 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 989 transitions. Word has length 22 [2022-03-03 19:11:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 989 transitions. [2022-03-03 19:11:04,448 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) [2022-03-03 19:11:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 989 transitions. [2022-03-03 19:11:04,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:04,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:04,449 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] [2022-03-03 19:11:04,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:04,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-03 19:11:04,659 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -645629941, now seen corresponding path program 105 times [2022-03-03 19:11:04,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:04,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760499571] [2022-03-03 19:11:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:04,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:04,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760499571] [2022-03-03 19:11:04,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760499571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:04,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215247349] [2022-03-03 19:11:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:04,747 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) [2022-03-03 19:11:04,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 19:11:04,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:11:04,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:04,902 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 29 treesize of output 23 [2022-03-03 19:11:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:05,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:05,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:05,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:11:05,221 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:05,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:05,222 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 [2022-03-03 19:11:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:05,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215247349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:05,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:05,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:05,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197140141] [2022-03-03 19:11:05,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:05,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:05,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:05,225 INFO L87 Difference]: Start difference. First operand 334 states and 989 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:05,513 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2022-03-03 19:11:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:05,514 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 [2022-03-03 19:11:05,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:05,514 INFO L225 Difference]: With dead ends: 594 [2022-03-03 19:11:05,514 INFO L226 Difference]: Without dead ends: 594 [2022-03-03 19:11:05,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:11:05,515 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:05,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 222 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-03-03 19:11:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2022-03-03 19:11:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2022-03-03 19:11:05,519 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2022-03-03 19:11:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:05,519 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2022-03-03 19:11:05,519 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) [2022-03-03 19:11:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2022-03-03 19:11:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:05,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:05,520 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] [2022-03-03 19:11:05,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:05,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-03 19:11:05,735 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -139412553, now seen corresponding path program 106 times [2022-03-03 19:11:05,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:05,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901455179] [2022-03-03 19:11:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:05,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:05,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:05,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:05,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901455179] [2022-03-03 19:11:05,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901455179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:05,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9834414] [2022-03-03 19:11:05,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:05,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:05,811 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) [2022-03-03 19:11:05,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 19:11:05,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:05,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:05,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:06,024 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 29 treesize of output 23 [2022-03-03 19:11:06,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:06,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:06,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:06,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:11:06,347 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:06,347 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:06,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:06,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9834414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:06,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:06,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:06,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521252604] [2022-03-03 19:11:06,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:06,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:06,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:06,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:06,354 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:06,840 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2022-03-03 19:11:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:06,840 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 [2022-03-03 19:11:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:06,841 INFO L225 Difference]: With dead ends: 655 [2022-03-03 19:11:06,841 INFO L226 Difference]: Without dead ends: 655 [2022-03-03 19:11:06,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:11:06,841 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:06,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 186 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:06,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-03 19:11:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 339. [2022-03-03 19:11:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9822485207100593) internal successors, (1008), 338 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1008 transitions. [2022-03-03 19:11:06,846 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1008 transitions. Word has length 22 [2022-03-03 19:11:06,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:06,846 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1008 transitions. [2022-03-03 19:11:06,846 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) [2022-03-03 19:11:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1008 transitions. [2022-03-03 19:11:06,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:06,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:06,847 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] [2022-03-03 19:11:06,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-03 19:11:07,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-03 19:11:07,051 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2078725439, now seen corresponding path program 107 times [2022-03-03 19:11:07,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:07,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417361182] [2022-03-03 19:11:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:07,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:07,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:07,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417361182] [2022-03-03 19:11:07,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417361182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:07,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605230982] [2022-03-03 19:11:07,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:07,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:07,160 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) [2022-03-03 19:11:07,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 19:11:07,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:11:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:07,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:07,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:07,477 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 20 treesize of output 14 [2022-03-03 19:11:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:07,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:07,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:07,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-03-03 19:11:07,687 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:07,688 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 [2022-03-03 19:11:07,689 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 [2022-03-03 19:11:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:07,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605230982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:07,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:07,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:11:07,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41323759] [2022-03-03 19:11:07,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:07,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:11:07,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:11:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:11:07,700 INFO L87 Difference]: Start difference. First operand 339 states and 1008 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:08,106 INFO L93 Difference]: Finished difference Result 637 states and 1840 transitions. [2022-03-03 19:11:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:08,106 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 [2022-03-03 19:11:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:08,107 INFO L225 Difference]: With dead ends: 637 [2022-03-03 19:11:08,107 INFO L226 Difference]: Without dead ends: 628 [2022-03-03 19:11:08,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:08,107 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 142 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:08,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 229 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-03 19:11:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 339. [2022-03-03 19:11:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9526627218934913) internal successors, (998), 338 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 998 transitions. [2022-03-03 19:11:08,112 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 998 transitions. Word has length 22 [2022-03-03 19:11:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:08,112 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 998 transitions. [2022-03-03 19:11:08,112 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) [2022-03-03 19:11:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 998 transitions. [2022-03-03 19:11:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:08,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:08,113 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] [2022-03-03 19:11:08,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-03 19:11:08,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:08,314 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2043126113, now seen corresponding path program 108 times [2022-03-03 19:11:08,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:08,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419285884] [2022-03-03 19:11:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:08,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:08,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:08,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419285884] [2022-03-03 19:11:08,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419285884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:08,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769512091] [2022-03-03 19:11:08,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:08,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:08,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:08,424 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) [2022-03-03 19:11:08,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 19:11:08,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:11:08,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:08,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:08,626 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 29 treesize of output 23 [2022-03-03 19:11:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:08,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:08,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:08,935 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 13 treesize of output 17 [2022-03-03 19:11:08,968 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:08,968 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 8 treesize of output 7 [2022-03-03 19:11:08,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:08,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769512091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:08,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:08,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:08,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331759666] [2022-03-03 19:11:08,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:08,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:08,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:08,988 INFO L87 Difference]: Start difference. First operand 339 states and 998 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:09,441 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2022-03-03 19:11:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:09,441 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 [2022-03-03 19:11:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:09,442 INFO L225 Difference]: With dead ends: 565 [2022-03-03 19:11:09,442 INFO L226 Difference]: Without dead ends: 565 [2022-03-03 19:11:09,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:11:09,442 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:09,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 226 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-03 19:11:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 309. [2022-03-03 19:11:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-03-03 19:11:09,446 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-03-03 19:11:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:09,447 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-03-03 19:11:09,447 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) [2022-03-03 19:11:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-03-03 19:11:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:09,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:09,448 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] [2022-03-03 19:11:09,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-03 19:11:09,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-03 19:11:09,651 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash -41099855, now seen corresponding path program 109 times [2022-03-03 19:11:09,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:09,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964401420] [2022-03-03 19:11:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:09,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:09,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964401420] [2022-03-03 19:11:09,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964401420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:09,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136417242] [2022-03-03 19:11:09,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:09,725 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) [2022-03-03 19:11:09,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 19:11:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:09,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:09,925 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 [2022-03-03 19:11:10,041 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 39 treesize of output 31 [2022-03-03 19:11:10,042 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 35 treesize of output 27 [2022-03-03 19:11:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:10,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:10,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:10,159 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 47 treesize of output 45 [2022-03-03 19:11:10,248 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:10,249 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 8 treesize of output 7 [2022-03-03 19:11:10,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:10,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136417242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:10,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:10,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:10,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506457140] [2022-03-03 19:11:10,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:10,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:10,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:10,258 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:10,529 INFO L93 Difference]: Finished difference Result 477 states and 1389 transitions. [2022-03-03 19:11:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:10,530 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 [2022-03-03 19:11:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:10,531 INFO L225 Difference]: With dead ends: 477 [2022-03-03 19:11:10,531 INFO L226 Difference]: Without dead ends: 477 [2022-03-03 19:11:10,532 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 [2022-03-03 19:11:10,533 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:10,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 224 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-03 19:11:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 319. [2022-03-03 19:11:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9779874213836477) internal successors, (947), 318 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 947 transitions. [2022-03-03 19:11:10,541 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 947 transitions. Word has length 22 [2022-03-03 19:11:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:10,541 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 947 transitions. [2022-03-03 19:11:10,541 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) [2022-03-03 19:11:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 947 transitions. [2022-03-03 19:11:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:10,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:10,541 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] [2022-03-03 19:11:10,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:10,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-03 19:11:10,748 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1453503109, now seen corresponding path program 110 times [2022-03-03 19:11:10,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:10,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376637134] [2022-03-03 19:11:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:10,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:10,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:10,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376637134] [2022-03-03 19:11:10,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376637134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:10,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181792658] [2022-03-03 19:11:10,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:10,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:10,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:10,848 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) [2022-03-03 19:11:10,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 19:11:10,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:10,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:10,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:11,041 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 50 treesize of output 40 [2022-03-03 19:11:11,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:11:11,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:11:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:11,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:11,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:11,284 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 47 treesize of output 45 [2022-03-03 19:11:11,371 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:11,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:11,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:11,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181792658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:11,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:11,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:11,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42439346] [2022-03-03 19:11:11,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:11,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:11,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:11,377 INFO L87 Difference]: Start difference. First operand 319 states and 947 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:11,660 INFO L93 Difference]: Finished difference Result 504 states and 1456 transitions. [2022-03-03 19:11:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:11,660 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 [2022-03-03 19:11:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:11,661 INFO L225 Difference]: With dead ends: 504 [2022-03-03 19:11:11,661 INFO L226 Difference]: Without dead ends: 494 [2022-03-03 19:11:11,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:11,661 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 162 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:11,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 209 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-03-03 19:11:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 316. [2022-03-03 19:11:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.9682539682539684) internal successors, (935), 315 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 935 transitions. [2022-03-03 19:11:11,666 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 935 transitions. Word has length 22 [2022-03-03 19:11:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:11,666 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 935 transitions. [2022-03-03 19:11:11,666 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) [2022-03-03 19:11:11,666 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 935 transitions. [2022-03-03 19:11:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:11,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:11,666 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] [2022-03-03 19:11:11,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-03 19:11:11,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-03 19:11:11,879 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:11,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1878450319, now seen corresponding path program 111 times [2022-03-03 19:11:11,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:11,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213366922] [2022-03-03 19:11:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:11,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:11,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:11,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213366922] [2022-03-03 19:11:11,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213366922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:11,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345314849] [2022-03-03 19:11:11,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:11,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:11,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:11,976 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) [2022-03-03 19:11:11,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 19:11:12,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:11:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:12,169 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 50 treesize of output 40 [2022-03-03 19:11:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:12,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:12,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:12,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:12,451 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:12,451 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 8 treesize of output 7 [2022-03-03 19:11:12,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:12,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345314849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:12,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:12,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:12,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770460585] [2022-03-03 19:11:12,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:12,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:12,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:12,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:12,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:12,456 INFO L87 Difference]: Start difference. First operand 316 states and 935 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:12,729 INFO L93 Difference]: Finished difference Result 465 states and 1354 transitions. [2022-03-03 19:11:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:12,729 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 [2022-03-03 19:11:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:12,730 INFO L225 Difference]: With dead ends: 465 [2022-03-03 19:11:12,730 INFO L226 Difference]: Without dead ends: 445 [2022-03-03 19:11:12,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:12,730 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:12,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 234 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-03 19:11:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 313. [2022-03-03 19:11:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9583333333333335) internal successors, (923), 312 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 923 transitions. [2022-03-03 19:11:12,734 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 923 transitions. Word has length 22 [2022-03-03 19:11:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:12,734 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 923 transitions. [2022-03-03 19:11:12,734 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) [2022-03-03 19:11:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 923 transitions. [2022-03-03 19:11:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:12,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:12,734 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] [2022-03-03 19:11:12,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-03 19:11:12,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-03 19:11:12,951 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1255511653, now seen corresponding path program 112 times [2022-03-03 19:11:12,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:12,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380959059] [2022-03-03 19:11:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:13,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:13,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380959059] [2022-03-03 19:11:13,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380959059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:13,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188500700] [2022-03-03 19:11:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:13,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:13,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:13,040 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) [2022-03-03 19:11:13,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 19:11:13,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:13,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:13,283 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 50 treesize of output 40 [2022-03-03 19:11:13,386 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 44 treesize of output 36 [2022-03-03 19:11:13,388 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 40 treesize of output 32 [2022-03-03 19:11:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:13,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:13,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:13,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:13,691 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:13,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:13,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:13,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188500700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:13,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:13,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:13,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119558324] [2022-03-03 19:11:13,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:13,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:13,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:13,697 INFO L87 Difference]: Start difference. First operand 313 states and 923 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:13,961 INFO L93 Difference]: Finished difference Result 595 states and 1725 transitions. [2022-03-03 19:11:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:13,961 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 [2022-03-03 19:11:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:13,962 INFO L225 Difference]: With dead ends: 595 [2022-03-03 19:11:13,962 INFO L226 Difference]: Without dead ends: 595 [2022-03-03 19:11:13,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:11:13,962 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:13,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 206 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-03 19:11:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 323. [2022-03-03 19:11:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.012422360248447) internal successors, (970), 322 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 970 transitions. [2022-03-03 19:11:13,967 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 970 transitions. Word has length 22 [2022-03-03 19:11:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:13,967 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 970 transitions. [2022-03-03 19:11:13,967 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) [2022-03-03 19:11:13,967 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 970 transitions. [2022-03-03 19:11:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:13,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:13,967 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] [2022-03-03 19:11:13,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:14,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:14,183 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:14,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1544852679, now seen corresponding path program 113 times [2022-03-03 19:11:14,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:14,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723693472] [2022-03-03 19:11:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:14,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:14,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:14,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723693472] [2022-03-03 19:11:14,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723693472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:14,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180035757] [2022-03-03 19:11:14,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:14,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:14,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:14,238 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) [2022-03-03 19:11:14,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 19:11:14,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:14,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:14,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:14,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:14,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:14,520 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 45 treesize of output 35 [2022-03-03 19:11:14,521 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 39 treesize of output 33 [2022-03-03 19:11:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:14,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:14,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:14,690 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 47 treesize of output 45 [2022-03-03 19:11:14,777 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:14,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:14,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:14,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180035757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:14,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:14,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:14,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053307511] [2022-03-03 19:11:14,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:14,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:14,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:14,782 INFO L87 Difference]: Start difference. First operand 323 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:15,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:15,129 INFO L93 Difference]: Finished difference Result 642 states and 1842 transitions. [2022-03-03 19:11:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:15,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:11:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:15,130 INFO L225 Difference]: With dead ends: 642 [2022-03-03 19:11:15,130 INFO L226 Difference]: Without dead ends: 632 [2022-03-03 19:11:15,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:11:15,131 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 233 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:15,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 249 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-03 19:11:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 330. [2022-03-03 19:11:15,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9908814589665655) internal successors, (984), 329 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 984 transitions. [2022-03-03 19:11:15,135 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 984 transitions. Word has length 22 [2022-03-03 19:11:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:15,135 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 984 transitions. [2022-03-03 19:11:15,135 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) [2022-03-03 19:11:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 984 transitions. [2022-03-03 19:11:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:15,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:15,136 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] [2022-03-03 19:11:15,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:15,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:15,353 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -503777487, now seen corresponding path program 114 times [2022-03-03 19:11:15,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:15,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880192211] [2022-03-03 19:11:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:15,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:15,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:15,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880192211] [2022-03-03 19:11:15,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880192211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:15,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910720606] [2022-03-03 19:11:15,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:15,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:15,409 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) [2022-03-03 19:11:15,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 19:11:15,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:11:15,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:15,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:15,710 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 44 treesize of output 36 [2022-03-03 19:11:15,712 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 40 treesize of output 32 [2022-03-03 19:11:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:15,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:15,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:15,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:16,053 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:16,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:16,056 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 [2022-03-03 19:11:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:16,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910720606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:16,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:16,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:16,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454337547] [2022-03-03 19:11:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:16,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:16,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:16,060 INFO L87 Difference]: Start difference. First operand 330 states and 984 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:16,376 INFO L93 Difference]: Finished difference Result 603 states and 1720 transitions. [2022-03-03 19:11:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:16,376 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 [2022-03-03 19:11:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:16,377 INFO L225 Difference]: With dead ends: 603 [2022-03-03 19:11:16,377 INFO L226 Difference]: Without dead ends: 603 [2022-03-03 19:11:16,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:16,378 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 233 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:16,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 175 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-03 19:11:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 321. [2022-03-03 19:11:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.996875) internal successors, (959), 320 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 959 transitions. [2022-03-03 19:11:16,382 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 959 transitions. Word has length 22 [2022-03-03 19:11:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:16,382 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 959 transitions. [2022-03-03 19:11:16,382 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) [2022-03-03 19:11:16,382 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 959 transitions. [2022-03-03 19:11:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:16,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:16,382 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] [2022-03-03 19:11:16,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-03 19:11:16,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:16,591 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1714360505, now seen corresponding path program 115 times [2022-03-03 19:11:16,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:16,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165730272] [2022-03-03 19:11:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:16,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:16,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165730272] [2022-03-03 19:11:16,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165730272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:16,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461132527] [2022-03-03 19:11:16,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:16,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:16,684 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) [2022-03-03 19:11:16,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 19:11:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:16,913 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 50 treesize of output 40 [2022-03-03 19:11:16,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-03 19:11:17,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:11:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:17,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:17,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:17,145 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 47 treesize of output 45 [2022-03-03 19:11:17,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:17,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:17,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:17,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461132527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:17,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:17,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:17,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960582190] [2022-03-03 19:11:17,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:17,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:17,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:17,254 INFO L87 Difference]: Start difference. First operand 321 states and 959 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:17,480 INFO L93 Difference]: Finished difference Result 547 states and 1570 transitions. [2022-03-03 19:11:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:17,480 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 [2022-03-03 19:11:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:17,481 INFO L225 Difference]: With dead ends: 547 [2022-03-03 19:11:17,481 INFO L226 Difference]: Without dead ends: 538 [2022-03-03 19:11:17,481 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 [2022-03-03 19:11:17,481 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 140 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:17,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 209 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-03 19:11:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 327. [2022-03-03 19:11:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.978527607361963) internal successors, (971), 326 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 971 transitions. [2022-03-03 19:11:17,485 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 971 transitions. Word has length 22 [2022-03-03 19:11:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:17,485 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 971 transitions. [2022-03-03 19:11:17,485 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) [2022-03-03 19:11:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 971 transitions. [2022-03-03 19:11:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:17,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:17,486 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] [2022-03-03 19:11:17,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:17,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-03 19:11:17,702 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:17,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2056609999, now seen corresponding path program 116 times [2022-03-03 19:11:17,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:17,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225415970] [2022-03-03 19:11:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:17,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:17,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:17,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225415970] [2022-03-03 19:11:17,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225415970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:17,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041751139] [2022-03-03 19:11:17,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:17,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:17,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:17,763 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) [2022-03-03 19:11:17,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 19:11:17,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:17,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:18,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:18,046 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 40 treesize of output 32 [2022-03-03 19:11:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:18,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:18,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:18,148 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 47 treesize of output 45 [2022-03-03 19:11:18,235 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:18,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:18,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:18,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041751139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:18,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:18,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:11:18,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955725936] [2022-03-03 19:11:18,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:18,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:11:18,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:18,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:11:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:11:18,240 INFO L87 Difference]: Start difference. First operand 327 states and 971 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:18,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:18,559 INFO L93 Difference]: Finished difference Result 640 states and 1787 transitions. [2022-03-03 19:11:18,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:18,559 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 [2022-03-03 19:11:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:18,560 INFO L225 Difference]: With dead ends: 640 [2022-03-03 19:11:18,560 INFO L226 Difference]: Without dead ends: 630 [2022-03-03 19:11:18,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:18,560 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 199 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:18,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 205 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:18,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-03 19:11:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 349. [2022-03-03 19:11:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9741379310344827) internal successors, (1035), 348 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1035 transitions. [2022-03-03 19:11:18,564 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1035 transitions. Word has length 22 [2022-03-03 19:11:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:18,564 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1035 transitions. [2022-03-03 19:11:18,564 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) [2022-03-03 19:11:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1035 transitions. [2022-03-03 19:11:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:18,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:18,565 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] [2022-03-03 19:11:18,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:18,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-03 19:11:18,781 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:18,781 INFO L85 PathProgramCache]: Analyzing trace with hash 475838083, now seen corresponding path program 117 times [2022-03-03 19:11:18,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:18,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202594047] [2022-03-03 19:11:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:18,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:18,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:18,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202594047] [2022-03-03 19:11:18,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202594047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:18,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091926570] [2022-03-03 19:11:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:18,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:18,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:18,833 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) [2022-03-03 19:11:18,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 19:11:18,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:11:18,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:18,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:18,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:19,060 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 45 treesize of output 35 [2022-03-03 19:11:19,062 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 39 treesize of output 33 [2022-03-03 19:11:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:19,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:19,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:19,159 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 47 treesize of output 45 [2022-03-03 19:11:19,253 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:19,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:19,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:19,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091926570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:19,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:19,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:11:19,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446314680] [2022-03-03 19:11:19,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:19,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:11:19,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:11:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:11:19,258 INFO L87 Difference]: Start difference. First operand 349 states and 1035 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:19,531 INFO L93 Difference]: Finished difference Result 597 states and 1676 transitions. [2022-03-03 19:11:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:19,531 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 [2022-03-03 19:11:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:19,532 INFO L225 Difference]: With dead ends: 597 [2022-03-03 19:11:19,532 INFO L226 Difference]: Without dead ends: 585 [2022-03-03 19:11:19,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:19,532 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:19,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 209 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-03 19:11:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 329. [2022-03-03 19:11:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2022-03-03 19:11:19,537 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 22 [2022-03-03 19:11:19,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:19,537 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2022-03-03 19:11:19,537 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) [2022-03-03 19:11:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2022-03-03 19:11:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:19,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:19,537 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] [2022-03-03 19:11:19,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-03 19:11:19,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-03 19:11:19,748 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:19,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1854643641, now seen corresponding path program 118 times [2022-03-03 19:11:19,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:19,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835866030] [2022-03-03 19:11:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:19,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:19,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835866030] [2022-03-03 19:11:19,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835866030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:19,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350513214] [2022-03-03 19:11:19,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:19,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:19,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:19,819 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) [2022-03-03 19:11:19,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 19:11:19,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:19,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:19,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:19,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:20,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:20,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:20,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:20,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:20,521 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:20,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:20,523 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 [2022-03-03 19:11:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:20,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350513214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:20,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:20,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:20,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780014987] [2022-03-03 19:11:20,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:20,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:20,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:20,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:20,529 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:20,864 INFO L93 Difference]: Finished difference Result 465 states and 1359 transitions. [2022-03-03 19:11:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:20,864 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 [2022-03-03 19:11:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:20,865 INFO L225 Difference]: With dead ends: 465 [2022-03-03 19:11:20,865 INFO L226 Difference]: Without dead ends: 445 [2022-03-03 19:11:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:20,865 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:20,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 159 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-03-03 19:11:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 335. [2022-03-03 19:11:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9580838323353293) internal successors, (988), 334 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 988 transitions. [2022-03-03 19:11:20,870 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 988 transitions. Word has length 22 [2022-03-03 19:11:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 988 transitions. [2022-03-03 19:11:20,870 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) [2022-03-03 19:11:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 988 transitions. [2022-03-03 19:11:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:20,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:20,871 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] [2022-03-03 19:11:20,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:21,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-03 19:11:21,093 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 95354501, now seen corresponding path program 119 times [2022-03-03 19:11:21,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:21,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816541281] [2022-03-03 19:11:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:21,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:21,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:21,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816541281] [2022-03-03 19:11:21,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816541281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:21,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417350580] [2022-03-03 19:11:21,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:21,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:21,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:21,141 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) [2022-03-03 19:11:21,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 19:11:21,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:11:21,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:21,300 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 50 treesize of output 40 [2022-03-03 19:11:21,389 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 28 treesize of output 22 [2022-03-03 19:11:21,390 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 26 treesize of output 20 [2022-03-03 19:11:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:21,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:21,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:21,464 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 42 treesize of output 40 [2022-03-03 19:11:21,533 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:21,533 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:21,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:21,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:21,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417350580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:21,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:21,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:11:21,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999123300] [2022-03-03 19:11:21,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:21,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:11:21,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:21,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:11:21,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:11:21,538 INFO L87 Difference]: Start difference. First operand 335 states and 988 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:21,857 INFO L93 Difference]: Finished difference Result 543 states and 1537 transitions. [2022-03-03 19:11:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:21,857 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 [2022-03-03 19:11:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:21,858 INFO L225 Difference]: With dead ends: 543 [2022-03-03 19:11:21,858 INFO L226 Difference]: Without dead ends: 533 [2022-03-03 19:11:21,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:21,858 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:21,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 251 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-03 19:11:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 357. [2022-03-03 19:11:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2022-03-03 19:11:21,862 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2022-03-03 19:11:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:21,862 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2022-03-03 19:11:21,863 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) [2022-03-03 19:11:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2022-03-03 19:11:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:21,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:21,863 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] [2022-03-03 19:11:21,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:22,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-03 19:11:22,079 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1485417415, now seen corresponding path program 120 times [2022-03-03 19:11:22,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:22,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577579030] [2022-03-03 19:11:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:22,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:22,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:22,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577579030] [2022-03-03 19:11:22,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577579030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:22,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917675509] [2022-03-03 19:11:22,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:22,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:22,146 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) [2022-03-03 19:11:22,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 19:11:22,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:11:22,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:22,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:22,374 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 50 treesize of output 40 [2022-03-03 19:11:22,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:22,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:22,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:22,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:22,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-03 19:11:22,602 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:22,602 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 8 treesize of output 7 [2022-03-03 19:11:22,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:22,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917675509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:22,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:22,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:11:22,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797292700] [2022-03-03 19:11:22,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:22,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:11:22,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:11:22,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:11:22,607 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:22,830 INFO L93 Difference]: Finished difference Result 500 states and 1426 transitions. [2022-03-03 19:11:22,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:22,830 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 [2022-03-03 19:11:22,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:22,831 INFO L225 Difference]: With dead ends: 500 [2022-03-03 19:11:22,831 INFO L226 Difference]: Without dead ends: 485 [2022-03-03 19:11:22,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:11:22,831 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:22,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 185 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:11:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-03 19:11:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 331. [2022-03-03 19:11:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2022-03-03 19:11:22,835 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2022-03-03 19:11:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:22,835 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2022-03-03 19:11:22,835 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) [2022-03-03 19:11:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2022-03-03 19:11:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:22,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:22,836 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] [2022-03-03 19:11:22,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:23,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:23,052 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1434517723, now seen corresponding path program 121 times [2022-03-03 19:11:23,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:23,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061978007] [2022-03-03 19:11:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:23,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:23,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:23,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061978007] [2022-03-03 19:11:23,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061978007] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:23,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935007177] [2022-03-03 19:11:23,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:23,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:23,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:23,108 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) [2022-03-03 19:11:23,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 19:11:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:23,437 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 31 treesize of output 23 [2022-03-03 19:11:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:23,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:23,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:23,723 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:23,724 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:23,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:11:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:23,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935007177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:23,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:23,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:23,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629682550] [2022-03-03 19:11:23,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:23,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:23,732 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:24,110 INFO L93 Difference]: Finished difference Result 460 states and 1324 transitions. [2022-03-03 19:11:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:24,110 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 [2022-03-03 19:11:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:24,111 INFO L225 Difference]: With dead ends: 460 [2022-03-03 19:11:24,111 INFO L226 Difference]: Without dead ends: 460 [2022-03-03 19:11:24,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:24,111 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:24,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 241 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-03 19:11:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 334. [2022-03-03 19:11:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.951951951951952) internal successors, (983), 333 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 983 transitions. [2022-03-03 19:11:24,115 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 983 transitions. Word has length 22 [2022-03-03 19:11:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:24,115 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 983 transitions. [2022-03-03 19:11:24,115 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) [2022-03-03 19:11:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 983 transitions. [2022-03-03 19:11:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:24,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:24,116 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] [2022-03-03 19:11:24,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-03 19:11:24,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:24,316 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1365846609, now seen corresponding path program 122 times [2022-03-03 19:11:24,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:24,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577218731] [2022-03-03 19:11:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:24,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:24,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577218731] [2022-03-03 19:11:24,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577218731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:24,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637122328] [2022-03-03 19:11:24,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:24,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:24,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:24,401 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) [2022-03-03 19:11:24,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-03 19:11:24,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:24,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:24,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:24,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:24,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:11:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:24,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:24,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:25,027 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:25,027 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 8 treesize of output 7 [2022-03-03 19:11:25,030 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 [2022-03-03 19:11:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:25,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637122328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:25,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:25,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:25,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310630375] [2022-03-03 19:11:25,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:25,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:25,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:25,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:25,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:25,035 INFO L87 Difference]: Start difference. First operand 334 states and 983 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:25,386 INFO L93 Difference]: Finished difference Result 487 states and 1388 transitions. [2022-03-03 19:11:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:25,386 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 [2022-03-03 19:11:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:25,387 INFO L225 Difference]: With dead ends: 487 [2022-03-03 19:11:25,387 INFO L226 Difference]: Without dead ends: 477 [2022-03-03 19:11:25,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:25,387 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 112 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:25,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 186 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:25,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-03-03 19:11:25,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 331. [2022-03-03 19:11:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9424242424242424) internal successors, (971), 330 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 971 transitions. [2022-03-03 19:11:25,391 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 971 transitions. Word has length 22 [2022-03-03 19:11:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:25,391 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 971 transitions. [2022-03-03 19:11:25,391 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) [2022-03-03 19:11:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 971 transitions. [2022-03-03 19:11:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:25,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:25,392 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] [2022-03-03 19:11:25,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:25,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:25,603 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash -940899399, now seen corresponding path program 123 times [2022-03-03 19:11:25,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:25,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243449729] [2022-03-03 19:11:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:25,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:25,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243449729] [2022-03-03 19:11:25,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243449729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:25,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492403702] [2022-03-03 19:11:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:25,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:25,674 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) [2022-03-03 19:11:25,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-03 19:11:25,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:11:25,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:25,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:26,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:26,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:26,092 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 47 treesize of output 45 [2022-03-03 19:11:26,225 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:26,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:26,227 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 [2022-03-03 19:11:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:26,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492403702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:26,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:26,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:26,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644026919] [2022-03-03 19:11:26,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:26,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:26,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:26,231 INFO L87 Difference]: Start difference. First operand 331 states and 971 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:26,524 INFO L93 Difference]: Finished difference Result 438 states and 1272 transitions. [2022-03-03 19:11:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:26,524 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 [2022-03-03 19:11:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:26,524 INFO L225 Difference]: With dead ends: 438 [2022-03-03 19:11:26,525 INFO L226 Difference]: Without dead ends: 418 [2022-03-03 19:11:26,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:11:26,525 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 99 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:26,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 217 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-03 19:11:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 313. [2022-03-03 19:11:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9455128205128207) internal successors, (919), 312 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 919 transitions. [2022-03-03 19:11:26,528 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 919 transitions. Word has length 22 [2022-03-03 19:11:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:26,528 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 919 transitions. [2022-03-03 19:11:26,529 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) [2022-03-03 19:11:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 919 transitions. [2022-03-03 19:11:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:26,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:26,529 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] [2022-03-03 19:11:26,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:26,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:26,731 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1398909669, now seen corresponding path program 124 times [2022-03-03 19:11:26,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:26,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308735463] [2022-03-03 19:11:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:26,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:26,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308735463] [2022-03-03 19:11:26,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308735463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:26,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707423023] [2022-03-03 19:11:26,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:26,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:26,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:26,826 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) [2022-03-03 19:11:26,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-03 19:11:26,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:26,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:27,110 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 20 treesize of output 14 [2022-03-03 19:11:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:27,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:27,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:27,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:11:27,443 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:27,443 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 [2022-03-03 19:11:27,445 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 [2022-03-03 19:11:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:27,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707423023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:27,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:27,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:27,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480704939] [2022-03-03 19:11:27,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:27,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:27,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:27,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:27,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:27,450 INFO L87 Difference]: Start difference. First operand 313 states and 919 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:27,781 INFO L93 Difference]: Finished difference Result 519 states and 1508 transitions. [2022-03-03 19:11:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:27,781 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 [2022-03-03 19:11:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:27,782 INFO L225 Difference]: With dead ends: 519 [2022-03-03 19:11:27,782 INFO L226 Difference]: Without dead ends: 519 [2022-03-03 19:11:27,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:27,782 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:27,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 164 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-03-03 19:11:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 325. [2022-03-03 19:11:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.984567901234568) internal successors, (967), 324 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 967 transitions. [2022-03-03 19:11:27,786 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 967 transitions. Word has length 22 [2022-03-03 19:11:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:27,786 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 967 transitions. [2022-03-03 19:11:27,786 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) [2022-03-03 19:11:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 967 transitions. [2022-03-03 19:11:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:27,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:27,787 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] [2022-03-03 19:11:27,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-03 19:11:27,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:27,995 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:27,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1401454663, now seen corresponding path program 125 times [2022-03-03 19:11:27,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:27,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416696080] [2022-03-03 19:11:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:28,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:28,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416696080] [2022-03-03 19:11:28,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416696080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:28,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092120026] [2022-03-03 19:11:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:28,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:28,086 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) [2022-03-03 19:11:28,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-03 19:11:28,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:11:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:28,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:11:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:28,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:28,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:28,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-03 19:11:28,545 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:28,545 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:28,549 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 [2022-03-03 19:11:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:28,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092120026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:28,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:28,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:28,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767031587] [2022-03-03 19:11:28,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:28,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:28,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:28,552 INFO L87 Difference]: Start difference. First operand 325 states and 967 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:28,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:28,779 INFO L93 Difference]: Finished difference Result 491 states and 1422 transitions. [2022-03-03 19:11:28,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:11:28,779 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 [2022-03-03 19:11:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:28,780 INFO L225 Difference]: With dead ends: 491 [2022-03-03 19:11:28,780 INFO L226 Difference]: Without dead ends: 481 [2022-03-03 19:11:28,780 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 [2022-03-03 19:11:28,780 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:28,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 202 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-03 19:11:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 332. [2022-03-03 19:11:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9637462235649545) internal successors, (981), 331 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 981 transitions. [2022-03-03 19:11:28,784 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 981 transitions. Word has length 22 [2022-03-03 19:11:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:28,784 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 981 transitions. [2022-03-03 19:11:28,784 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) [2022-03-03 19:11:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 981 transitions. [2022-03-03 19:11:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:28,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:28,785 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] [2022-03-03 19:11:28,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-03 19:11:28,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:28,999 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1720566983, now seen corresponding path program 126 times [2022-03-03 19:11:28,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:28,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586913297] [2022-03-03 19:11:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:29,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:29,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586913297] [2022-03-03 19:11:29,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586913297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:29,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432760811] [2022-03-03 19:11:29,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:29,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:29,096 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) [2022-03-03 19:11:29,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-03 19:11:29,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:11:29,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:29,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:29,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:29,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:29,510 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:29,510 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 8 treesize of output 7 [2022-03-03 19:11:29,512 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 [2022-03-03 19:11:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:29,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432760811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:29,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:29,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:29,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750192861] [2022-03-03 19:11:29,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:29,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:29,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:29,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:29,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:29,515 INFO L87 Difference]: Start difference. First operand 332 states and 981 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:29,743 INFO L93 Difference]: Finished difference Result 419 states and 1236 transitions. [2022-03-03 19:11:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:29,743 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 [2022-03-03 19:11:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:29,744 INFO L225 Difference]: With dead ends: 419 [2022-03-03 19:11:29,744 INFO L226 Difference]: Without dead ends: 419 [2022-03-03 19:11:29,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:11:29,744 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:29,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 211 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-03 19:11:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 310. [2022-03-03 19:11:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.9449838187702264) internal successors, (910), 309 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2022-03-03 19:11:29,748 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 22 [2022-03-03 19:11:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:29,748 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2022-03-03 19:11:29,748 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) [2022-03-03 19:11:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2022-03-03 19:11:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:29,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:29,748 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] [2022-03-03 19:11:29,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-03 19:11:29,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:29,965 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash -88220487, now seen corresponding path program 127 times [2022-03-03 19:11:29,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:29,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368605281] [2022-03-03 19:11:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:29,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:30,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:30,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368605281] [2022-03-03 19:11:30,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368605281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:30,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751337705] [2022-03-03 19:11:30,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:30,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:30,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:30,025 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) [2022-03-03 19:11:30,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-03 19:11:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:30,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:30,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2022-03-03 19:11:30,334 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 51 treesize of output 41 [2022-03-03 19:11:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:30,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:30,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:30,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:11:30,575 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:30,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:30,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:30,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751337705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:30,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:30,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:30,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720338675] [2022-03-03 19:11:30,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:30,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:30,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:30,581 INFO L87 Difference]: Start difference. First operand 310 states and 910 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:30,838 INFO L93 Difference]: Finished difference Result 600 states and 1741 transitions. [2022-03-03 19:11:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:30,838 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 [2022-03-03 19:11:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:30,839 INFO L225 Difference]: With dead ends: 600 [2022-03-03 19:11:30,839 INFO L226 Difference]: Without dead ends: 600 [2022-03-03 19:11:30,839 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 [2022-03-03 19:11:30,839 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 212 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:30,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 172 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:11:30,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-03-03 19:11:30,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 324. [2022-03-03 19:11:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 3.0123839009287927) internal successors, (973), 323 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 973 transitions. [2022-03-03 19:11:30,843 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 973 transitions. Word has length 22 [2022-03-03 19:11:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:30,843 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 973 transitions. [2022-03-03 19:11:30,844 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) [2022-03-03 19:11:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 973 transitions. [2022-03-03 19:11:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:30,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:30,846 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] [2022-03-03 19:11:30,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-03 19:11:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-03 19:11:31,063 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1406382477, now seen corresponding path program 128 times [2022-03-03 19:11:31,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:31,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389003313] [2022-03-03 19:11:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:31,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:31,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389003313] [2022-03-03 19:11:31,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389003313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:31,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280504163] [2022-03-03 19:11:31,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:31,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:31,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:31,125 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) [2022-03-03 19:11:31,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-03 19:11:31,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:31,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:31,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:31,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:31,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:31,402 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 60 treesize of output 48 [2022-03-03 19:11:31,403 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 52 treesize of output 42 [2022-03-03 19:11:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:31,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:31,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:31,571 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 [2022-03-03 19:11:31,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:31,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:31,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:31,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280504163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:31,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:31,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:31,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107834460] [2022-03-03 19:11:31,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:31,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:31,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:31,621 INFO L87 Difference]: Start difference. First operand 324 states and 973 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:31,900 INFO L93 Difference]: Finished difference Result 615 states and 1762 transitions. [2022-03-03 19:11:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:31,900 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 [2022-03-03 19:11:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:31,901 INFO L225 Difference]: With dead ends: 615 [2022-03-03 19:11:31,901 INFO L226 Difference]: Without dead ends: 605 [2022-03-03 19:11:31,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=616, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:31,901 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 172 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 232 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-03 19:11:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 331. [2022-03-03 19:11:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9909090909090907) internal successors, (987), 330 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 987 transitions. [2022-03-03 19:11:31,905 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 987 transitions. Word has length 22 [2022-03-03 19:11:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:31,906 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 987 transitions. [2022-03-03 19:11:31,906 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) [2022-03-03 19:11:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 987 transitions. [2022-03-03 19:11:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:31,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:31,906 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] [2022-03-03 19:11:31,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:32,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-03 19:11:32,119 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1847509627, now seen corresponding path program 129 times [2022-03-03 19:11:32,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:32,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660486930] [2022-03-03 19:11:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:32,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:32,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660486930] [2022-03-03 19:11:32,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660486930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:32,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193175739] [2022-03-03 19:11:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:32,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:32,215 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) [2022-03-03 19:11:32,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-03 19:11:32,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:11:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:32,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:32,466 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 29 treesize of output 23 [2022-03-03 19:11:32,537 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 59 treesize of output 47 [2022-03-03 19:11:32,539 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 51 treesize of output 41 [2022-03-03 19:11:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:32,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:32,751 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:32,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:11:32,807 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:32,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:32,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:32,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193175739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:32,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:32,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:32,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354995917] [2022-03-03 19:11:32,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:32,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:32,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:32,813 INFO L87 Difference]: Start difference. First operand 331 states and 987 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:33,167 INFO L93 Difference]: Finished difference Result 684 states and 1957 transitions. [2022-03-03 19:11:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:11:33,168 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 [2022-03-03 19:11:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:33,169 INFO L225 Difference]: With dead ends: 684 [2022-03-03 19:11:33,169 INFO L226 Difference]: Without dead ends: 684 [2022-03-03 19:11:33,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:11:33,169 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 188 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:33,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 226 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-03 19:11:33,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 337. [2022-03-03 19:11:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.017857142857143) internal successors, (1014), 336 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1014 transitions. [2022-03-03 19:11:33,174 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1014 transitions. Word has length 22 [2022-03-03 19:11:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:33,174 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1014 transitions. [2022-03-03 19:11:33,174 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) [2022-03-03 19:11:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1014 transitions. [2022-03-03 19:11:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:33,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:33,174 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] [2022-03-03 19:11:33,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:33,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-03 19:11:33,391 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 370628365, now seen corresponding path program 130 times [2022-03-03 19:11:33,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:33,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812972901] [2022-03-03 19:11:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:33,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:33,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:33,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812972901] [2022-03-03 19:11:33,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812972901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:33,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669443692] [2022-03-03 19:11:33,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:33,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:33,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:33,450 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) [2022-03-03 19:11:33,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-03 19:11:33,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:33,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:33,742 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 59 treesize of output 47 [2022-03-03 19:11:33,743 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 51 treesize of output 41 [2022-03-03 19:11:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:33,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:33,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:33,903 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 18 treesize of output 22 [2022-03-03 19:11:33,944 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:33,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:33,946 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 [2022-03-03 19:11:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:33,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669443692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:33,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:33,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:33,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254070818] [2022-03-03 19:11:33,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:33,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:33,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:33,949 INFO L87 Difference]: Start difference. First operand 337 states and 1014 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:34,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:34,195 INFO L93 Difference]: Finished difference Result 628 states and 1807 transitions. [2022-03-03 19:11:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:34,195 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 [2022-03-03 19:11:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:34,196 INFO L225 Difference]: With dead ends: 628 [2022-03-03 19:11:34,196 INFO L226 Difference]: Without dead ends: 619 [2022-03-03 19:11:34,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:34,196 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 170 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:34,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 171 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-03 19:11:34,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 343. [2022-03-03 19:11:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 3.0) internal successors, (1026), 342 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1026 transitions. [2022-03-03 19:11:34,201 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1026 transitions. Word has length 22 [2022-03-03 19:11:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:34,201 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1026 transitions. [2022-03-03 19:11:34,201 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) [2022-03-03 19:11:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1026 transitions. [2022-03-03 19:11:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:34,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:34,202 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] [2022-03-03 19:11:34,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:34,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:34,416 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 712877859, now seen corresponding path program 131 times [2022-03-03 19:11:34,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:34,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630876672] [2022-03-03 19:11:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:34,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:34,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630876672] [2022-03-03 19:11:34,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630876672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:34,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352819469] [2022-03-03 19:11:34,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:34,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:34,471 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) [2022-03-03 19:11:34,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-03 19:11:34,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:11:34,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:34,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:34,851 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 60 treesize of output 48 [2022-03-03 19:11:34,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-03 19:11:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:34,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:35,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:35,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-03 19:11:35,144 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:35,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:35,147 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 [2022-03-03 19:11:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:35,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352819469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:35,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:35,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:11:35,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555237130] [2022-03-03 19:11:35,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:35,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:11:35,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:11:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:11:35,152 INFO L87 Difference]: Start difference. First operand 343 states and 1026 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:35,602 INFO L93 Difference]: Finished difference Result 667 states and 1877 transitions. [2022-03-03 19:11:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:11:35,602 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 [2022-03-03 19:11:35,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:35,603 INFO L225 Difference]: With dead ends: 667 [2022-03-03 19:11:35,603 INFO L226 Difference]: Without dead ends: 657 [2022-03-03 19:11:35,604 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 [2022-03-03 19:11:35,604 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 199 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:35,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 212 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-03 19:11:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 355. [2022-03-03 19:11:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 3.005649717514124) internal successors, (1064), 354 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1064 transitions. [2022-03-03 19:11:35,609 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1064 transitions. Word has length 22 [2022-03-03 19:11:35,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:35,609 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1064 transitions. [2022-03-03 19:11:35,609 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) [2022-03-03 19:11:35,609 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1064 transitions. [2022-03-03 19:11:35,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:35,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:35,609 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] [2022-03-03 19:11:35,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:35,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-03 19:11:35,824 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -867894057, now seen corresponding path program 132 times [2022-03-03 19:11:35,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:35,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072659240] [2022-03-03 19:11:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:35,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:35,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:35,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072659240] [2022-03-03 19:11:35,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072659240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:35,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837061659] [2022-03-03 19:11:35,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:35,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:35,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:35,918 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) [2022-03-03 19:11:35,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-03 19:11:36,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:11:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:36,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:36,204 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 29 treesize of output 23 [2022-03-03 19:11:36,311 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 60 treesize of output 48 [2022-03-03 19:11:36,313 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 52 treesize of output 42 [2022-03-03 19:11:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:36,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:36,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:36,537 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-03 19:11:36,608 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:36,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:36,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:36,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837061659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:36,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:36,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:11:36,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929897217] [2022-03-03 19:11:36,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:11:36,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:11:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:11:36,616 INFO L87 Difference]: Start difference. First operand 355 states and 1064 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:36,992 INFO L93 Difference]: Finished difference Result 581 states and 1669 transitions. [2022-03-03 19:11:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:11:36,992 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 [2022-03-03 19:11:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:36,993 INFO L225 Difference]: With dead ends: 581 [2022-03-03 19:11:36,993 INFO L226 Difference]: Without dead ends: 569 [2022-03-03 19:11:36,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:11:36,993 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:36,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 194 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-03 19:11:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 351. [2022-03-03 19:11:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.005714285714286) internal successors, (1052), 350 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1052 transitions. [2022-03-03 19:11:36,998 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1052 transitions. Word has length 22 [2022-03-03 19:11:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:36,998 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1052 transitions. [2022-03-03 19:11:37,000 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) [2022-03-03 19:11:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1052 transitions. [2022-03-03 19:11:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:37,000 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:37,000 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] [2022-03-03 19:11:37,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:37,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:37,203 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1148998577, now seen corresponding path program 133 times [2022-03-03 19:11:37,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:37,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989936526] [2022-03-03 19:11:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:37,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:37,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989936526] [2022-03-03 19:11:37,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989936526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:37,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418423580] [2022-03-03 19:11:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:37,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:37,301 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) [2022-03-03 19:11:37,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-03 19:11:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:37,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:37,562 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 29 treesize of output 23 [2022-03-03 19:11:37,682 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 55 treesize of output 43 [2022-03-03 19:11:37,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:37,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:37,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:37,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:11:37,889 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:37,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:37,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:37,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418423580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:37,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:37,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:37,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032041232] [2022-03-03 19:11:37,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:37,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:37,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:37,893 INFO L87 Difference]: Start difference. First operand 351 states and 1052 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:38,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:38,153 INFO L93 Difference]: Finished difference Result 559 states and 1621 transitions. [2022-03-03 19:11:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:38,154 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 [2022-03-03 19:11:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:38,154 INFO L225 Difference]: With dead ends: 559 [2022-03-03 19:11:38,154 INFO L226 Difference]: Without dead ends: 559 [2022-03-03 19:11:38,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:11:38,155 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 186 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:38,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 205 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-03-03 19:11:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 356. [2022-03-03 19:11:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 3.0) internal successors, (1065), 355 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1065 transitions. [2022-03-03 19:11:38,159 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1065 transitions. Word has length 22 [2022-03-03 19:11:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:38,159 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 1065 transitions. [2022-03-03 19:11:38,159 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) [2022-03-03 19:11:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1065 transitions. [2022-03-03 19:11:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:38,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:38,160 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] [2022-03-03 19:11:38,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-03 19:11:38,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:38,363 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:38,363 INFO L85 PathProgramCache]: Analyzing trace with hash 345604387, now seen corresponding path program 134 times [2022-03-03 19:11:38,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:38,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091261952] [2022-03-03 19:11:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:38,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:38,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:38,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091261952] [2022-03-03 19:11:38,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091261952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:38,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014962716] [2022-03-03 19:11:38,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:38,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:38,423 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) [2022-03-03 19:11:38,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-03 19:11:38,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:38,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:38,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:38,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:38,715 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 55 treesize of output 43 [2022-03-03 19:11:38,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2022-03-03 19:11:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:38,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:38,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:38,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:11:38,916 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:38,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:38,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:38,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014962716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:38,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:38,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:38,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584281761] [2022-03-03 19:11:38,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:38,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:38,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:38,921 INFO L87 Difference]: Start difference. First operand 356 states and 1065 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:39,149 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2022-03-03 19:11:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:11:39,149 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 [2022-03-03 19:11:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:39,150 INFO L225 Difference]: With dead ends: 531 [2022-03-03 19:11:39,150 INFO L226 Difference]: Without dead ends: 521 [2022-03-03 19:11:39,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:11:39,150 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:39,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 215 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-03 19:11:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 335. [2022-03-03 19:11:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.970059880239521) internal successors, (992), 334 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 992 transitions. [2022-03-03 19:11:39,154 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 992 transitions. Word has length 22 [2022-03-03 19:11:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:39,154 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 992 transitions. [2022-03-03 19:11:39,154 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) [2022-03-03 19:11:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 992 transitions. [2022-03-03 19:11:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:39,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:39,155 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] [2022-03-03 19:11:39,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:39,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:39,369 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:39,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash -180315899, now seen corresponding path program 135 times [2022-03-03 19:11:39,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:39,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487142720] [2022-03-03 19:11:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:39,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:39,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:39,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487142720] [2022-03-03 19:11:39,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487142720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:39,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943400314] [2022-03-03 19:11:39,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:39,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:39,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:39,451 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) [2022-03-03 19:11:39,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-03 19:11:39,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:11:39,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:39,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:39,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:39,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:39,902 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 18 treesize of output 22 [2022-03-03 19:11:39,947 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:39,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:39,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:39,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943400314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:39,952 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:39,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:39,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74784523] [2022-03-03 19:11:39,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:39,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:39,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:39,952 INFO L87 Difference]: Start difference. First operand 335 states and 992 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:40,214 INFO L93 Difference]: Finished difference Result 464 states and 1374 transitions. [2022-03-03 19:11:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:40,214 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 [2022-03-03 19:11:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:40,215 INFO L225 Difference]: With dead ends: 464 [2022-03-03 19:11:40,215 INFO L226 Difference]: Without dead ends: 464 [2022-03-03 19:11:40,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:40,215 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:40,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 226 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-03 19:11:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 332. [2022-03-03 19:11:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9697885196374623) internal successors, (983), 331 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 983 transitions. [2022-03-03 19:11:40,219 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 983 transitions. Word has length 22 [2022-03-03 19:11:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:40,219 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 983 transitions. [2022-03-03 19:11:40,219 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) [2022-03-03 19:11:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 983 transitions. [2022-03-03 19:11:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:40,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:40,219 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] [2022-03-03 19:11:40,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:40,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:40,437 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash 325901489, now seen corresponding path program 136 times [2022-03-03 19:11:40,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:40,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661832527] [2022-03-03 19:11:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:40,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:40,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:40,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661832527] [2022-03-03 19:11:40,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661832527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:40,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405248661] [2022-03-03 19:11:40,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:40,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:40,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:40,543 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) [2022-03-03 19:11:40,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-03 19:11:40,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:40,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:40,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:40,828 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 20 treesize of output 14 [2022-03-03 19:11:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:40,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:40,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:40,978 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 18 treesize of output 22 [2022-03-03 19:11:41,022 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:41,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:41,024 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 [2022-03-03 19:11:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:41,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405248661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:41,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:41,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:41,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741551426] [2022-03-03 19:11:41,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:41,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:41,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:41,027 INFO L87 Difference]: Start difference. First operand 332 states and 983 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:41,328 INFO L93 Difference]: Finished difference Result 513 states and 1468 transitions. [2022-03-03 19:11:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:41,328 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 [2022-03-03 19:11:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:41,329 INFO L225 Difference]: With dead ends: 513 [2022-03-03 19:11:41,329 INFO L226 Difference]: Without dead ends: 513 [2022-03-03 19:11:41,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:11:41,329 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:41,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 217 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-03 19:11:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 340. [2022-03-03 19:11:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.982300884955752) internal successors, (1011), 339 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1011 transitions. [2022-03-03 19:11:41,333 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1011 transitions. Word has length 22 [2022-03-03 19:11:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:41,333 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1011 transitions. [2022-03-03 19:11:41,333 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) [2022-03-03 19:11:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1011 transitions. [2022-03-03 19:11:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:41,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:41,334 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] [2022-03-03 19:11:41,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:41,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-03-03 19:11:41,550 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:41,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1750927815, now seen corresponding path program 137 times [2022-03-03 19:11:41,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:41,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494774532] [2022-03-03 19:11:41,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:41,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:41,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:41,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494774532] [2022-03-03 19:11:41,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494774532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:41,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117275383] [2022-03-03 19:11:41,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:41,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:41,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:41,655 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) [2022-03-03 19:11:41,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-03 19:11:41,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:11:41,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:41,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:41,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:41,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:11:41,965 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 55 treesize of output 45 [2022-03-03 19:11:41,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:42,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:42,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:42,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-03-03 19:11:42,214 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:42,215 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 [2022-03-03 19:11:42,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:42,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117275383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:42,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:42,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:42,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493343137] [2022-03-03 19:11:42,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:42,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:42,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:42,220 INFO L87 Difference]: Start difference. First operand 340 states and 1011 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:42,551 INFO L93 Difference]: Finished difference Result 487 states and 1400 transitions. [2022-03-03 19:11:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:42,551 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 [2022-03-03 19:11:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:42,552 INFO L225 Difference]: With dead ends: 487 [2022-03-03 19:11:42,552 INFO L226 Difference]: Without dead ends: 478 [2022-03-03 19:11:42,552 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 [2022-03-03 19:11:42,552 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:42,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-03 19:11:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 340. [2022-03-03 19:11:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9528023598820057) internal successors, (1001), 339 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1001 transitions. [2022-03-03 19:11:42,556 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1001 transitions. Word has length 22 [2022-03-03 19:11:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:42,556 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1001 transitions. [2022-03-03 19:11:42,556 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) [2022-03-03 19:11:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1001 transitions. [2022-03-03 19:11:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:42,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:42,557 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] [2022-03-03 19:11:42,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:42,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-03 19:11:42,771 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1786527141, now seen corresponding path program 138 times [2022-03-03 19:11:42,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:42,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387145646] [2022-03-03 19:11:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:42,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:42,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:42,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387145646] [2022-03-03 19:11:42,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387145646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:42,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806589438] [2022-03-03 19:11:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:42,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:42,859 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) [2022-03-03 19:11:42,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-03 19:11:43,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:11:43,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:43,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:43,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:43,101 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 29 treesize of output 23 [2022-03-03 19:11:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:43,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:43,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:43,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:11:43,492 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:43,492 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 8 treesize of output 7 [2022-03-03 19:11:43,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:43,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806589438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:43,499 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:43,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:43,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314222599] [2022-03-03 19:11:43,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:43,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:43,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:43,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:43,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:43,500 INFO L87 Difference]: Start difference. First operand 340 states and 1001 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:43,871 INFO L93 Difference]: Finished difference Result 423 states and 1248 transitions. [2022-03-03 19:11:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:43,871 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 [2022-03-03 19:11:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:43,872 INFO L225 Difference]: With dead ends: 423 [2022-03-03 19:11:43,872 INFO L226 Difference]: Without dead ends: 423 [2022-03-03 19:11:43,872 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 [2022-03-03 19:11:43,872 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:43,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 198 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:43,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-03-03 19:11:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 309. [2022-03-03 19:11:43,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2022-03-03 19:11:43,876 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2022-03-03 19:11:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:43,876 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2022-03-03 19:11:43,876 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) [2022-03-03 19:11:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2022-03-03 19:11:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:43,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:43,876 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] [2022-03-03 19:11:43,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-03 19:11:44,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-03 19:11:44,077 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:44,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:44,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1957780507, now seen corresponding path program 139 times [2022-03-03 19:11:44,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:44,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256491037] [2022-03-03 19:11:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:44,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:44,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:44,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256491037] [2022-03-03 19:11:44,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256491037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:44,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776020861] [2022-03-03 19:11:44,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:44,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:44,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:44,161 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) [2022-03-03 19:11:44,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-03 19:11:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:44,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:44,398 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 50 treesize of output 40 [2022-03-03 19:11:44,617 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 39 treesize of output 31 [2022-03-03 19:11:44,618 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 35 treesize of output 27 [2022-03-03 19:11:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:44,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:44,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:44,760 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 47 treesize of output 45 [2022-03-03 19:11:44,839 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:44,839 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 8 treesize of output 7 [2022-03-03 19:11:44,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:44,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776020861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:44,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:44,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:44,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399370580] [2022-03-03 19:11:44,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:44,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:44,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:44,843 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:45,132 INFO L93 Difference]: Finished difference Result 735 states and 2141 transitions. [2022-03-03 19:11:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:45,132 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 [2022-03-03 19:11:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:45,133 INFO L225 Difference]: With dead ends: 735 [2022-03-03 19:11:45,133 INFO L226 Difference]: Without dead ends: 735 [2022-03-03 19:11:45,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:45,134 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 219 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:45,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 214 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-03-03 19:11:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 329. [2022-03-03 19:11:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2022-03-03 19:11:45,139 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2022-03-03 19:11:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:45,139 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2022-03-03 19:11:45,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2022-03-03 19:11:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:45,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:45,139 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] [2022-03-03 19:11:45,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:45,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-03 19:11:45,356 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash -463177543, now seen corresponding path program 140 times [2022-03-03 19:11:45,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:45,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962917902] [2022-03-03 19:11:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:45,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:45,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:45,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962917902] [2022-03-03 19:11:45,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962917902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:45,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18661742] [2022-03-03 19:11:45,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:45,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:45,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:45,436 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) [2022-03-03 19:11:45,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-03 19:11:45,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:45,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:45,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:45,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:45,667 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 50 treesize of output 40 [2022-03-03 19:11:45,869 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 39 treesize of output 31 [2022-03-03 19:11:45,871 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 35 treesize of output 27 [2022-03-03 19:11:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:45,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:46,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:46,076 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 47 treesize of output 45 [2022-03-03 19:11:46,210 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:46,211 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 8 treesize of output 7 [2022-03-03 19:11:46,213 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 [2022-03-03 19:11:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:46,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18661742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:46,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:46,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:46,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871128274] [2022-03-03 19:11:46,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:46,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:46,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:46,219 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:46,770 INFO L93 Difference]: Finished difference Result 758 states and 2196 transitions. [2022-03-03 19:11:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:11:46,770 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 [2022-03-03 19:11:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:46,771 INFO L225 Difference]: With dead ends: 758 [2022-03-03 19:11:46,771 INFO L226 Difference]: Without dead ends: 748 [2022-03-03 19:11:46,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:11:46,771 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 273 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:46,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 191 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-03-03 19:11:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 326. [2022-03-03 19:11:46,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0) internal successors, (975), 325 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:46,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 975 transitions. [2022-03-03 19:11:46,776 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 975 transitions. Word has length 22 [2022-03-03 19:11:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:46,776 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 975 transitions. [2022-03-03 19:11:46,776 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) [2022-03-03 19:11:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 975 transitions. [2022-03-03 19:11:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:46,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:46,777 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] [2022-03-03 19:11:46,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:46,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-03 19:11:46,993 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash -38230333, now seen corresponding path program 141 times [2022-03-03 19:11:46,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:46,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000736933] [2022-03-03 19:11:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:47,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:47,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000736933] [2022-03-03 19:11:47,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000736933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:47,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610381696] [2022-03-03 19:11:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:47,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:47,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:47,054 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) [2022-03-03 19:11:47,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-03 19:11:47,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:11:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:47,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:47,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:47,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:47,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:47,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:47,558 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:47,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:47,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:47,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610381696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:47,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:47,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:47,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745280154] [2022-03-03 19:11:47,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:47,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:47,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:47,562 INFO L87 Difference]: Start difference. First operand 326 states and 975 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:47,869 INFO L93 Difference]: Finished difference Result 732 states and 2133 transitions. [2022-03-03 19:11:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:11:47,869 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 [2022-03-03 19:11:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:47,870 INFO L225 Difference]: With dead ends: 732 [2022-03-03 19:11:47,870 INFO L226 Difference]: Without dead ends: 712 [2022-03-03 19:11:47,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:11:47,870 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 215 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:47,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 228 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-03 19:11:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 323. [2022-03-03 19:11:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2022-03-03 19:11:47,875 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 22 [2022-03-03 19:11:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:47,875 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2022-03-03 19:11:47,875 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) [2022-03-03 19:11:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2022-03-03 19:11:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:47,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:47,875 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] [2022-03-03 19:11:47,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:48,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-03-03 19:11:48,089 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1733366227, now seen corresponding path program 142 times [2022-03-03 19:11:48,089 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:48,089 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125592716] [2022-03-03 19:11:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:48,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:48,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125592716] [2022-03-03 19:11:48,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125592716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:48,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137707807] [2022-03-03 19:11:48,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:48,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:48,163 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) [2022-03-03 19:11:48,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-03 19:11:48,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:48,414 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 50 treesize of output 40 [2022-03-03 19:11:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:48,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:48,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:48,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:11:48,820 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:48,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:48,822 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 [2022-03-03 19:11:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:48,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137707807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:48,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:48,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:48,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625697417] [2022-03-03 19:11:48,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:48,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:48,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:48,826 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:49,213 INFO L93 Difference]: Finished difference Result 741 states and 2128 transitions. [2022-03-03 19:11:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:49,213 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 [2022-03-03 19:11:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:49,214 INFO L225 Difference]: With dead ends: 741 [2022-03-03 19:11:49,214 INFO L226 Difference]: Without dead ends: 705 [2022-03-03 19:11:49,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:11:49,215 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 141 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:49,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 234 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-03-03 19:11:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 317. [2022-03-03 19:11:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.971518987341772) internal successors, (939), 316 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 939 transitions. [2022-03-03 19:11:49,219 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 939 transitions. Word has length 22 [2022-03-03 19:11:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 939 transitions. [2022-03-03 19:11:49,219 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) [2022-03-03 19:11:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 939 transitions. [2022-03-03 19:11:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:49,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:49,220 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] [2022-03-03 19:11:49,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-03 19:11:49,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:49,423 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -257969397, now seen corresponding path program 143 times [2022-03-03 19:11:49,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:49,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101993261] [2022-03-03 19:11:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:49,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:49,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:49,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101993261] [2022-03-03 19:11:49,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101993261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:49,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961427063] [2022-03-03 19:11:49,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:49,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:49,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:49,486 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) [2022-03-03 19:11:49,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-03 19:11:49,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:49,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:49,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:49,709 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 50 treesize of output 40 [2022-03-03 19:11:49,896 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 31 treesize of output 23 [2022-03-03 19:11:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:49,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:50,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:50,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:50,171 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:50,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:50,173 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 [2022-03-03 19:11:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:50,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961427063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:50,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:50,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:50,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407625760] [2022-03-03 19:11:50,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:50,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:50,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:50,177 INFO L87 Difference]: Start difference. First operand 317 states and 939 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:50,477 INFO L93 Difference]: Finished difference Result 644 states and 1879 transitions. [2022-03-03 19:11:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:50,477 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 [2022-03-03 19:11:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:50,478 INFO L225 Difference]: With dead ends: 644 [2022-03-03 19:11:50,478 INFO L226 Difference]: Without dead ends: 644 [2022-03-03 19:11:50,478 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 [2022-03-03 19:11:50,479 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 212 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:50,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 192 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:50,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-03 19:11:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 325. [2022-03-03 19:11:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0) internal successors, (972), 324 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 972 transitions. [2022-03-03 19:11:50,483 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 972 transitions. Word has length 22 [2022-03-03 19:11:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:50,483 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 972 transitions. [2022-03-03 19:11:50,483 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) [2022-03-03 19:11:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 972 transitions. [2022-03-03 19:11:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:50,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:50,484 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] [2022-03-03 19:11:50,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:50,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-03 19:11:50,700 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1236633567, now seen corresponding path program 144 times [2022-03-03 19:11:50,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:50,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853793971] [2022-03-03 19:11:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:50,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:50,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853793971] [2022-03-03 19:11:50,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853793971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:50,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158622905] [2022-03-03 19:11:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:11:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:50,791 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) [2022-03-03 19:11:50,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-03 19:11:50,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:11:50,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:50,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:51,026 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 50 treesize of output 40 [2022-03-03 19:11:51,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:11:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:51,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:51,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:51,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:51,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:51,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:51,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:51,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158622905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:51,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:51,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:51,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141791146] [2022-03-03 19:11:51,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:51,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:51,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:51,463 INFO L87 Difference]: Start difference. First operand 325 states and 972 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:52,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:52,176 INFO L93 Difference]: Finished difference Result 728 states and 2117 transitions. [2022-03-03 19:11:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:11:52,176 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 [2022-03-03 19:11:52,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:52,177 INFO L225 Difference]: With dead ends: 728 [2022-03-03 19:11:52,177 INFO L226 Difference]: Without dead ends: 718 [2022-03-03 19:11:52,177 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 [2022-03-03 19:11:52,177 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 207 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:52,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 231 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-03 19:11:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 322. [2022-03-03 19:11:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9906542056074765) internal successors, (960), 321 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 960 transitions. [2022-03-03 19:11:52,182 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 960 transitions. Word has length 22 [2022-03-03 19:11:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 960 transitions. [2022-03-03 19:11:52,182 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) [2022-03-03 19:11:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 960 transitions. [2022-03-03 19:11:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:52,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:52,183 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] [2022-03-03 19:11:52,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:52,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:52,399 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1661580777, now seen corresponding path program 145 times [2022-03-03 19:11:52,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:52,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383270541] [2022-03-03 19:11:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:52,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:52,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383270541] [2022-03-03 19:11:52,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383270541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:52,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935718923] [2022-03-03 19:11:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:11:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:52,454 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) [2022-03-03 19:11:52,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-03 19:11:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:52,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:52,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:52,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:52,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:11:52,971 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:52,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:52,973 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 [2022-03-03 19:11:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:52,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935718923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:52,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:52,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:52,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951726682] [2022-03-03 19:11:52,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:52,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:52,976 INFO L87 Difference]: Start difference. First operand 322 states and 960 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:53,504 INFO L93 Difference]: Finished difference Result 652 states and 1904 transitions. [2022-03-03 19:11:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:11:53,504 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 [2022-03-03 19:11:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:53,505 INFO L225 Difference]: With dead ends: 652 [2022-03-03 19:11:53,505 INFO L226 Difference]: Without dead ends: 632 [2022-03-03 19:11:53,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:11:53,506 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:53,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 173 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-03 19:11:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 319. [2022-03-03 19:11:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.981132075471698) internal successors, (948), 318 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 948 transitions. [2022-03-03 19:11:53,510 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 948 transitions. Word has length 22 [2022-03-03 19:11:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:53,510 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 948 transitions. [2022-03-03 19:11:53,510 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) [2022-03-03 19:11:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 948 transitions. [2022-03-03 19:11:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:53,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:53,511 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] [2022-03-03 19:11:53,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:53,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:53,727 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1038642111, now seen corresponding path program 146 times [2022-03-03 19:11:53,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:53,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070615296] [2022-03-03 19:11:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:53,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:53,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:53,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070615296] [2022-03-03 19:11:53,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070615296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:53,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505236225] [2022-03-03 19:11:53,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:11:53,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:53,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:53,781 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) [2022-03-03 19:11:53,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-03 19:11:53,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:11:53,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:54,017 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 50 treesize of output 40 [2022-03-03 19:11:54,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-03 19:11:54,112 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 40 treesize of output 32 [2022-03-03 19:11:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:54,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:54,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:54,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:54,486 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:54,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:11:54,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:54,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505236225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:54,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:54,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:54,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924570529] [2022-03-03 19:11:54,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:54,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:54,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:54,494 INFO L87 Difference]: Start difference. First operand 319 states and 948 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:55,111 INFO L93 Difference]: Finished difference Result 762 states and 2215 transitions. [2022-03-03 19:11:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:55,111 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 [2022-03-03 19:11:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:55,112 INFO L225 Difference]: With dead ends: 762 [2022-03-03 19:11:55,112 INFO L226 Difference]: Without dead ends: 762 [2022-03-03 19:11:55,112 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 [2022-03-03 19:11:55,112 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 260 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:55,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 250 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-03 19:11:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 329. [2022-03-03 19:11:55,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.033536585365854) internal successors, (995), 328 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 995 transitions. [2022-03-03 19:11:55,117 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 995 transitions. Word has length 22 [2022-03-03 19:11:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:55,117 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 995 transitions. [2022-03-03 19:11:55,117 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) [2022-03-03 19:11:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 995 transitions. [2022-03-03 19:11:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:55,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:55,118 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] [2022-03-03 19:11:55,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:55,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:55,334 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1761722221, now seen corresponding path program 147 times [2022-03-03 19:11:55,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:55,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820242754] [2022-03-03 19:11:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:55,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:55,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820242754] [2022-03-03 19:11:55,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820242754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:55,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39020591] [2022-03-03 19:11:55,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:11:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:55,430 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) [2022-03-03 19:11:55,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-03 19:11:55,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:11:55,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:55,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:55,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:55,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:55,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:55,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:55,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:56,096 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:56,097 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 8 treesize of output 7 [2022-03-03 19:11:56,098 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 [2022-03-03 19:11:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:56,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39020591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:56,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:56,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:56,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409111896] [2022-03-03 19:11:56,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:56,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:56,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:56,103 INFO L87 Difference]: Start difference. First operand 329 states and 995 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:56,950 INFO L93 Difference]: Finished difference Result 845 states and 2440 transitions. [2022-03-03 19:11:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:11:56,951 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 [2022-03-03 19:11:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:56,952 INFO L225 Difference]: With dead ends: 845 [2022-03-03 19:11:56,952 INFO L226 Difference]: Without dead ends: 835 [2022-03-03 19:11:56,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:11:56,952 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 278 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:56,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 245 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:56,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-03 19:11:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 336. [2022-03-03 19:11:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 3.011940298507463) internal successors, (1009), 335 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1009 transitions. [2022-03-03 19:11:56,957 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1009 transitions. Word has length 22 [2022-03-03 19:11:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:56,957 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1009 transitions. [2022-03-03 19:11:56,957 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) [2022-03-03 19:11:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1009 transitions. [2022-03-03 19:11:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:56,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:56,958 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] [2022-03-03 19:11:56,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-03 19:11:57,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:57,174 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:57,174 INFO L85 PathProgramCache]: Analyzing trace with hash -720647029, now seen corresponding path program 148 times [2022-03-03 19:11:57,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:57,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168299842] [2022-03-03 19:11:57,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:57,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:57,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:57,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168299842] [2022-03-03 19:11:57,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168299842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:57,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166416177] [2022-03-03 19:11:57,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:11:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:57,259 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) [2022-03-03 19:11:57,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-03 19:11:57,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:11:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:57,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:11:57,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:57,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:57,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:57,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:57,829 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:11:57,935 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:57,935 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 [2022-03-03 19:11:57,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:57,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166416177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:57,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:57,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:11:57,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062323720] [2022-03-03 19:11:57,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:57,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:11:57,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:11:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:11:57,941 INFO L87 Difference]: Start difference. First operand 336 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:58,365 INFO L93 Difference]: Finished difference Result 770 states and 2210 transitions. [2022-03-03 19:11:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:11:58,365 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 [2022-03-03 19:11:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:58,366 INFO L225 Difference]: With dead ends: 770 [2022-03-03 19:11:58,366 INFO L226 Difference]: Without dead ends: 770 [2022-03-03 19:11:58,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=717, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:11:58,366 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 257 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:58,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 226 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:11:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-03 19:11:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 327. [2022-03-03 19:11:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 3.01840490797546) internal successors, (984), 326 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 984 transitions. [2022-03-03 19:11:58,371 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 984 transitions. Word has length 22 [2022-03-03 19:11:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:58,371 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 984 transitions. [2022-03-03 19:11:58,371 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) [2022-03-03 19:11:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 984 transitions. [2022-03-03 19:11:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:58,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:58,371 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] [2022-03-03 19:11:58,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-03 19:11:58,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-03 19:11:58,588 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:11:58,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:11:58,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1497490963, now seen corresponding path program 149 times [2022-03-03 19:11:58,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:11:58,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420015411] [2022-03-03 19:11:58,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:11:58,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:11:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:11:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:58,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:11:58,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420015411] [2022-03-03 19:11:58,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420015411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:11:58,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928414667] [2022-03-03 19:11:58,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:11:58,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:11:58,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:11:58,652 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) [2022-03-03 19:11:58,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-03 19:11:58,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:11:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:11:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:11:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:11:58,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:11:59,099 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 45 treesize of output 35 [2022-03-03 19:11:59,101 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 39 treesize of output 33 [2022-03-03 19:11:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:59,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:11:59,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:11:59,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:59,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:11:59,436 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 8 treesize of output 7 [2022-03-03 19:11:59,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:11:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:11:59,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928414667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:11:59,444 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:11:59,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:11:59,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640035049] [2022-03-03 19:11:59,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:11:59,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:11:59,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:11:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:11:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:11:59,445 INFO L87 Difference]: Start difference. First operand 327 states and 984 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:11:59,958 INFO L93 Difference]: Finished difference Result 686 states and 1976 transitions. [2022-03-03 19:11:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:11:59,959 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 [2022-03-03 19:11:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:11:59,960 INFO L225 Difference]: With dead ends: 686 [2022-03-03 19:11:59,960 INFO L226 Difference]: Without dead ends: 677 [2022-03-03 19:11:59,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:11:59,960 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 207 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:11:59,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 215 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:11:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-03 19:11:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 333. [2022-03-03 19:11:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0) internal successors, (996), 332 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:11:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 996 transitions. [2022-03-03 19:11:59,964 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 996 transitions. Word has length 22 [2022-03-03 19:11:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:11:59,965 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 996 transitions. [2022-03-03 19:11:59,965 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) [2022-03-03 19:11:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 996 transitions. [2022-03-03 19:11:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:11:59,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:11:59,965 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] [2022-03-03 19:11:59,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:00,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-03 19:12:00,175 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:00,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1839740457, now seen corresponding path program 150 times [2022-03-03 19:12:00,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:00,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100309622] [2022-03-03 19:12:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:00,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:00,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100309622] [2022-03-03 19:12:00,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100309622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:00,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012526107] [2022-03-03 19:12:00,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:00,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:00,237 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) [2022-03-03 19:12:00,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-03 19:12:00,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:12:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:00,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:00,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:12:00,645 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 44 treesize of output 36 [2022-03-03 19:12:00,647 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 40 treesize of output 32 [2022-03-03 19:12:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:00,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:00,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:00,839 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 42 treesize of output 40 [2022-03-03 19:12:00,943 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:00,943 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 [2022-03-03 19:12:00,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:00,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012526107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:00,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:00,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:00,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867989039] [2022-03-03 19:12:00,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:00,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:00,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:00,951 INFO L87 Difference]: Start difference. First operand 333 states and 996 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:01,899 INFO L93 Difference]: Finished difference Result 814 states and 2298 transitions. [2022-03-03 19:12:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:12:01,899 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 [2022-03-03 19:12:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:01,901 INFO L225 Difference]: With dead ends: 814 [2022-03-03 19:12:01,901 INFO L226 Difference]: Without dead ends: 804 [2022-03-03 19:12:01,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=1306, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:12:01,901 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 249 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:01,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 260 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-03 19:12:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 355. [2022-03-03 19:12:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.994350282485876) internal successors, (1060), 354 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1060 transitions. [2022-03-03 19:12:01,906 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1060 transitions. Word has length 22 [2022-03-03 19:12:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:01,907 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 1060 transitions. [2022-03-03 19:12:01,907 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) [2022-03-03 19:12:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1060 transitions. [2022-03-03 19:12:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:01,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:01,919 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] [2022-03-03 19:12:01,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:02,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-03 19:12:02,135 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 258968541, now seen corresponding path program 151 times [2022-03-03 19:12:02,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:02,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639775108] [2022-03-03 19:12:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:02,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:02,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639775108] [2022-03-03 19:12:02,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639775108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:02,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159216303] [2022-03-03 19:12:02,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:02,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:02,236 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) [2022-03-03 19:12:02,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-03 19:12:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:02,506 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 50 treesize of output 40 [2022-03-03 19:12:02,599 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 45 treesize of output 35 [2022-03-03 19:12:02,601 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 39 treesize of output 33 [2022-03-03 19:12:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:02,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:02,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:02,740 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 47 treesize of output 45 [2022-03-03 19:12:02,846 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:02,846 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 8 treesize of output 7 [2022-03-03 19:12:02,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:02,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159216303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:02,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:02,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:02,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823350410] [2022-03-03 19:12:02,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:02,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:02,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:02,852 INFO L87 Difference]: Start difference. First operand 355 states and 1060 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:03,519 INFO L93 Difference]: Finished difference Result 771 states and 2187 transitions. [2022-03-03 19:12:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:12:03,520 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 [2022-03-03 19:12:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:03,521 INFO L225 Difference]: With dead ends: 771 [2022-03-03 19:12:03,521 INFO L226 Difference]: Without dead ends: 759 [2022-03-03 19:12:03,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=1108, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:12:03,521 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 204 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:03,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 238 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-03 19:12:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 335. [2022-03-03 19:12:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9940119760479043) internal successors, (1000), 334 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1000 transitions. [2022-03-03 19:12:03,526 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1000 transitions. Word has length 22 [2022-03-03 19:12:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:03,526 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1000 transitions. [2022-03-03 19:12:03,526 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) [2022-03-03 19:12:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1000 transitions. [2022-03-03 19:12:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:03,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:03,526 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] [2022-03-03 19:12:03,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:03,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-03 19:12:03,742 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1637774099, now seen corresponding path program 152 times [2022-03-03 19:12:03,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:03,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020131601] [2022-03-03 19:12:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:03,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:03,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020131601] [2022-03-03 19:12:03,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020131601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:03,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690872560] [2022-03-03 19:12:03,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:03,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:03,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:03,805 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) [2022-03-03 19:12:03,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-03 19:12:03,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:03,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:04,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:04,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:04,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:04,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:04,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:04,556 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:04,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:04,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:04,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690872560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:04,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:04,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:04,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332752480] [2022-03-03 19:12:04,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:04,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:04,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:04,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:04,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:04,564 INFO L87 Difference]: Start difference. First operand 335 states and 1000 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:05,054 INFO L93 Difference]: Finished difference Result 634 states and 1850 transitions. [2022-03-03 19:12:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:05,054 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 [2022-03-03 19:12:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:05,055 INFO L225 Difference]: With dead ends: 634 [2022-03-03 19:12:05,055 INFO L226 Difference]: Without dead ends: 614 [2022-03-03 19:12:05,055 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 [2022-03-03 19:12:05,055 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:05,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 177 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:05,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-03 19:12:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 341. [2022-03-03 19:12:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9794117647058824) internal successors, (1013), 340 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1013 transitions. [2022-03-03 19:12:05,061 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1013 transitions. Word has length 22 [2022-03-03 19:12:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:05,061 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1013 transitions. [2022-03-03 19:12:05,061 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) [2022-03-03 19:12:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1013 transitions. [2022-03-03 19:12:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:05,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:05,061 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] [2022-03-03 19:12:05,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:05,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:05,270 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:05,270 INFO L85 PathProgramCache]: Analyzing trace with hash -121515041, now seen corresponding path program 153 times [2022-03-03 19:12:05,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:05,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839687464] [2022-03-03 19:12:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:05,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:05,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:05,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839687464] [2022-03-03 19:12:05,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839687464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:05,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178062886] [2022-03-03 19:12:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:05,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:05,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:05,352 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) [2022-03-03 19:12:05,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-03 19:12:05,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:12:05,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:05,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:05,612 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 50 treesize of output 40 [2022-03-03 19:12:05,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-03 19:12:05,776 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 26 treesize of output 20 [2022-03-03 19:12:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:05,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:05,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:05,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:05,995 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:05,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:05,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:06,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178062886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:06,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:06,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:06,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324893490] [2022-03-03 19:12:06,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:06,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:06,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:06,001 INFO L87 Difference]: Start difference. First operand 341 states and 1013 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:06,580 INFO L93 Difference]: Finished difference Result 712 states and 2028 transitions. [2022-03-03 19:12:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:12:06,580 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 [2022-03-03 19:12:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:06,581 INFO L225 Difference]: With dead ends: 712 [2022-03-03 19:12:06,581 INFO L226 Difference]: Without dead ends: 702 [2022-03-03 19:12:06,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:12:06,581 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 191 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:06,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 245 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-03-03 19:12:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 363. [2022-03-03 19:12:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.9751381215469612) internal successors, (1077), 362 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1077 transitions. [2022-03-03 19:12:06,586 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1077 transitions. Word has length 22 [2022-03-03 19:12:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:06,586 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 1077 transitions. [2022-03-03 19:12:06,586 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) [2022-03-03 19:12:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1077 transitions. [2022-03-03 19:12:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:06,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:06,599 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] [2022-03-03 19:12:06,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-03 19:12:06,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:06,799 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1702286957, now seen corresponding path program 154 times [2022-03-03 19:12:06,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:06,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311534709] [2022-03-03 19:12:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:06,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:06,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:06,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311534709] [2022-03-03 19:12:06,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311534709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:06,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416910294] [2022-03-03 19:12:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:06,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:06,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:06,866 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) [2022-03-03 19:12:06,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-03 19:12:07,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:07,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:07,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:07,234 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 28 treesize of output 22 [2022-03-03 19:12:07,235 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 26 treesize of output 20 [2022-03-03 19:12:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:07,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:07,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:07,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:07,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:07,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:07,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:07,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416910294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:07,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:07,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:07,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409491812] [2022-03-03 19:12:07,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:07,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:07,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:07,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:07,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:07,461 INFO L87 Difference]: Start difference. First operand 363 states and 1077 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:07,946 INFO L93 Difference]: Finished difference Result 669 states and 1917 transitions. [2022-03-03 19:12:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:07,947 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 [2022-03-03 19:12:07,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:07,947 INFO L225 Difference]: With dead ends: 669 [2022-03-03 19:12:07,947 INFO L226 Difference]: Without dead ends: 654 [2022-03-03 19:12:07,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:12:07,948 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:07,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 164 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-03-03 19:12:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 337. [2022-03-03 19:12:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.988095238095238) internal successors, (1004), 336 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1004 transitions. [2022-03-03 19:12:07,952 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1004 transitions. Word has length 22 [2022-03-03 19:12:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:07,952 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1004 transitions. [2022-03-03 19:12:07,952 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) [2022-03-03 19:12:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1004 transitions. [2022-03-03 19:12:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:07,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:07,953 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] [2022-03-03 19:12:07,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:08,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:08,155 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash 995359209, now seen corresponding path program 155 times [2022-03-03 19:12:08,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:08,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298797270] [2022-03-03 19:12:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:08,241 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:08,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298797270] [2022-03-03 19:12:08,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298797270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:08,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85585126] [2022-03-03 19:12:08,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:08,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:08,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:08,242 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) [2022-03-03 19:12:08,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-03 19:12:08,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:12:08,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:08,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:08,471 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 50 treesize of output 40 [2022-03-03 19:12:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:08,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:08,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:08,664 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 42 treesize of output 40 [2022-03-03 19:12:08,727 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:08,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:08,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:08,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85585126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:08,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:08,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:08,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920873587] [2022-03-03 19:12:08,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:08,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:08,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:08,732 INFO L87 Difference]: Start difference. First operand 337 states and 1004 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:09,034 INFO L93 Difference]: Finished difference Result 650 states and 1872 transitions. [2022-03-03 19:12:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:09,034 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 [2022-03-03 19:12:09,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:09,035 INFO L225 Difference]: With dead ends: 650 [2022-03-03 19:12:09,035 INFO L226 Difference]: Without dead ends: 614 [2022-03-03 19:12:09,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:12:09,035 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:09,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 209 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-03 19:12:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 347. [2022-03-03 19:12:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.96242774566474) internal successors, (1025), 346 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1025 transitions. [2022-03-03 19:12:09,039 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1025 transitions. Word has length 22 [2022-03-03 19:12:09,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:09,040 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 1025 transitions. [2022-03-03 19:12:09,040 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) [2022-03-03 19:12:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1025 transitions. [2022-03-03 19:12:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:09,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:09,040 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] [2022-03-03 19:12:09,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:09,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:09,257 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1582207485, now seen corresponding path program 156 times [2022-03-03 19:12:09,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:09,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127150254] [2022-03-03 19:12:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:09,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:09,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127150254] [2022-03-03 19:12:09,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127150254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:09,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500639918] [2022-03-03 19:12:09,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:09,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:09,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:09,304 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) [2022-03-03 19:12:09,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-03 19:12:09,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:12:09,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:09,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:09,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:09,533 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 50 treesize of output 40 [2022-03-03 19:12:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:09,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:09,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:09,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:09,768 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:09,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:09,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:09,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500639918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:09,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:09,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:09,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475929048] [2022-03-03 19:12:09,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:09,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:09,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:09,773 INFO L87 Difference]: Start difference. First operand 347 states and 1025 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:10,090 INFO L93 Difference]: Finished difference Result 594 states and 1722 transitions. [2022-03-03 19:12:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:10,090 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 [2022-03-03 19:12:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:10,091 INFO L225 Difference]: With dead ends: 594 [2022-03-03 19:12:10,091 INFO L226 Difference]: Without dead ends: 574 [2022-03-03 19:12:10,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:12:10,091 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:10,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 235 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-03-03 19:12:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 353. [2022-03-03 19:12:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.9488636363636362) internal successors, (1038), 352 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1038 transitions. [2022-03-03 19:12:10,096 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1038 transitions. Word has length 22 [2022-03-03 19:12:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:10,096 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1038 transitions. [2022-03-03 19:12:10,096 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) [2022-03-03 19:12:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1038 transitions. [2022-03-03 19:12:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:10,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:10,097 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] [2022-03-03 19:12:10,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:10,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2022-03-03 19:12:10,313 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:10,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 953470671, now seen corresponding path program 157 times [2022-03-03 19:12:10,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:10,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339469833] [2022-03-03 19:12:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:10,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:10,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339469833] [2022-03-03 19:12:10,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339469833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:10,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869090982] [2022-03-03 19:12:10,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:10,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:10,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:10,359 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) [2022-03-03 19:12:10,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-03 19:12:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:10,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:12:10,714 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 28 treesize of output 22 [2022-03-03 19:12:10,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:12:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:10,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:10,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:10,799 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:10,865 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:10,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:10,866 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 [2022-03-03 19:12:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:10,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869090982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:10,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:10,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:10,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460304837] [2022-03-03 19:12:10,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:10,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:10,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:10,869 INFO L87 Difference]: Start difference. First operand 353 states and 1038 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:11,244 INFO L93 Difference]: Finished difference Result 639 states and 1811 transitions. [2022-03-03 19:12:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:11,244 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 [2022-03-03 19:12:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:11,245 INFO L225 Difference]: With dead ends: 639 [2022-03-03 19:12:11,245 INFO L226 Difference]: Without dead ends: 609 [2022-03-03 19:12:11,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:12:11,245 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 145 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:11,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 248 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-03-03 19:12:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 340. [2022-03-03 19:12:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.976401179941003) internal successors, (1009), 339 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1009 transitions. [2022-03-03 19:12:11,250 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1009 transitions. Word has length 22 [2022-03-03 19:12:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:11,250 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 1009 transitions. [2022-03-03 19:12:11,250 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) [2022-03-03 19:12:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1009 transitions. [2022-03-03 19:12:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:11,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:11,250 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] [2022-03-03 19:12:11,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:11,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:11,467 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash 836691451, now seen corresponding path program 158 times [2022-03-03 19:12:11,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:11,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689570168] [2022-03-03 19:12:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:11,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:11,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:11,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689570168] [2022-03-03 19:12:11,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689570168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:11,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244451398] [2022-03-03 19:12:11,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:11,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:11,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:11,550 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) [2022-03-03 19:12:11,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-03 19:12:11,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:11,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:11,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:11,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:12:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:11,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:11,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:11,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:12,108 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:12,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:12,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:12,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244451398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:12,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:12,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:12,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042241635] [2022-03-03 19:12:12,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:12,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:12,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:12,115 INFO L87 Difference]: Start difference. First operand 340 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:12,437 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2022-03-03 19:12:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:12,438 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 [2022-03-03 19:12:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:12,438 INFO L225 Difference]: With dead ends: 613 [2022-03-03 19:12:12,438 INFO L226 Difference]: Without dead ends: 613 [2022-03-03 19:12:12,439 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 [2022-03-03 19:12:12,439 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:12,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 196 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:12,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-03-03 19:12:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 349. [2022-03-03 19:12:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2022-03-03 19:12:12,443 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2022-03-03 19:12:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:12,443 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2022-03-03 19:12:12,443 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) [2022-03-03 19:12:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2022-03-03 19:12:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:12,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:12,444 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] [2022-03-03 19:12:12,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:12,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:12,652 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:12,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1963672881, now seen corresponding path program 159 times [2022-03-03 19:12:12,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:12,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687077433] [2022-03-03 19:12:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:12,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:12,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:12,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687077433] [2022-03-03 19:12:12,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687077433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:12,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31827712] [2022-03-03 19:12:12,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:12,735 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) [2022-03-03 19:12:12,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-03 19:12:12,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:12:12,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:13,126 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 31 treesize of output 23 [2022-03-03 19:12:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:13,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:13,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:13,298 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 [2022-03-03 19:12:13,416 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:13,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:13,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:13,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31827712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:13,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:13,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:13,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804867708] [2022-03-03 19:12:13,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:13,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:13,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:13,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:13,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:13,422 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:13,892 INFO L93 Difference]: Finished difference Result 636 states and 1819 transitions. [2022-03-03 19:12:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:12:13,892 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 [2022-03-03 19:12:13,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:13,897 INFO L225 Difference]: With dead ends: 636 [2022-03-03 19:12:13,897 INFO L226 Difference]: Without dead ends: 626 [2022-03-03 19:12:13,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:12:13,897 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 199 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:13,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 180 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-03-03 19:12:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 346. [2022-03-03 19:12:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9565217391304346) internal successors, (1020), 345 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1020 transitions. [2022-03-03 19:12:13,901 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1020 transitions. Word has length 22 [2022-03-03 19:12:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:13,902 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 1020 transitions. [2022-03-03 19:12:13,902 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) [2022-03-03 19:12:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1020 transitions. [2022-03-03 19:12:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:13,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:13,902 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] [2022-03-03 19:12:13,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:14,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-03 19:12:14,119 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:14,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1538725671, now seen corresponding path program 160 times [2022-03-03 19:12:14,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:14,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430122585] [2022-03-03 19:12:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:14,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:14,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430122585] [2022-03-03 19:12:14,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430122585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:14,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492438071] [2022-03-03 19:12:14,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:14,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:14,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:14,208 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) [2022-03-03 19:12:14,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-03 19:12:14,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:14,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:14,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:14,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:14,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:14,826 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:14,826 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 8 treesize of output 7 [2022-03-03 19:12:14,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:12:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:14,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492438071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:14,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:14,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:14,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71220967] [2022-03-03 19:12:14,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:14,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:14,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:14,833 INFO L87 Difference]: Start difference. First operand 346 states and 1020 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:15,178 INFO L93 Difference]: Finished difference Result 622 states and 1797 transitions. [2022-03-03 19:12:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:15,178 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 [2022-03-03 19:12:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:15,179 INFO L225 Difference]: With dead ends: 622 [2022-03-03 19:12:15,179 INFO L226 Difference]: Without dead ends: 602 [2022-03-03 19:12:15,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:12:15,179 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 134 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:15,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 239 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-03-03 19:12:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 343. [2022-03-03 19:12:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.9473684210526314) internal successors, (1008), 342 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1008 transitions. [2022-03-03 19:12:15,184 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1008 transitions. Word has length 22 [2022-03-03 19:12:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:15,184 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 1008 transitions. [2022-03-03 19:12:15,184 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) [2022-03-03 19:12:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1008 transitions. [2022-03-03 19:12:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:15,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:15,184 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] [2022-03-03 19:12:15,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:15,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-03 19:12:15,397 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:15,397 INFO L85 PathProgramCache]: Analyzing trace with hash 232870889, now seen corresponding path program 161 times [2022-03-03 19:12:15,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:15,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380075613] [2022-03-03 19:12:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:15,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:15,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:15,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380075613] [2022-03-03 19:12:15,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380075613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:15,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035202595] [2022-03-03 19:12:15,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:15,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:15,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:15,443 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) [2022-03-03 19:12:15,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-03 19:12:15,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:15,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:15,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:15,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:15,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:15,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:15,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:15,894 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:15,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:15,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:15,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035202595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:15,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:15,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:15,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627963307] [2022-03-03 19:12:15,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:15,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:15,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:15,899 INFO L87 Difference]: Start difference. First operand 343 states and 1008 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:16,160 INFO L93 Difference]: Finished difference Result 550 states and 1589 transitions. [2022-03-03 19:12:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:12:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:16,161 INFO L225 Difference]: With dead ends: 550 [2022-03-03 19:12:16,161 INFO L226 Difference]: Without dead ends: 514 [2022-03-03 19:12:16,161 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 [2022-03-03 19:12:16,161 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:16,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 252 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-03 19:12:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 317. [2022-03-03 19:12:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9462025316455698) internal successors, (931), 316 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 931 transitions. [2022-03-03 19:12:16,165 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 931 transitions. Word has length 22 [2022-03-03 19:12:16,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:16,165 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 931 transitions. [2022-03-03 19:12:16,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:16,165 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 931 transitions. [2022-03-03 19:12:16,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:16,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:16,166 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] [2022-03-03 19:12:16,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:16,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-03 19:12:16,383 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:16,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1000298955, now seen corresponding path program 162 times [2022-03-03 19:12:16,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:16,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291204771] [2022-03-03 19:12:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:16,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:16,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291204771] [2022-03-03 19:12:16,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291204771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:16,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388213073] [2022-03-03 19:12:16,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:16,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:16,437 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) [2022-03-03 19:12:16,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-03 19:12:16,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:12:16,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:16,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:16,723 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 31 treesize of output 23 [2022-03-03 19:12:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:16,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:16,809 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 47 treesize of output 45 [2022-03-03 19:12:16,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:16,912 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 8 treesize of output 7 [2022-03-03 19:12:16,913 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 [2022-03-03 19:12:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:16,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388213073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:16,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:16,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:16,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266366982] [2022-03-03 19:12:16,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:16,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:16,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:16,916 INFO L87 Difference]: Start difference. First operand 317 states and 931 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:17,130 INFO L93 Difference]: Finished difference Result 499 states and 1457 transitions. [2022-03-03 19:12:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:17,131 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 [2022-03-03 19:12:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:17,131 INFO L225 Difference]: With dead ends: 499 [2022-03-03 19:12:17,131 INFO L226 Difference]: Without dead ends: 499 [2022-03-03 19:12:17,132 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 [2022-03-03 19:12:17,132 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 119 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:17,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 205 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-03 19:12:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 326. [2022-03-03 19:12:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9661538461538464) internal successors, (964), 325 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 964 transitions. [2022-03-03 19:12:17,136 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 964 transitions. Word has length 22 [2022-03-03 19:12:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:17,136 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 964 transitions. [2022-03-03 19:12:17,136 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) [2022-03-03 19:12:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 964 transitions. [2022-03-03 19:12:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:17,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:17,136 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] [2022-03-03 19:12:17,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:17,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:17,353 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1800065377, now seen corresponding path program 163 times [2022-03-03 19:12:17,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:17,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914368923] [2022-03-03 19:12:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:17,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:17,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914368923] [2022-03-03 19:12:17,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914368923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:17,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139183682] [2022-03-03 19:12:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:17,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:17,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:17,448 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) [2022-03-03 19:12:17,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-03 19:12:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:17,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:17,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:17,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:17,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:17,936 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:17,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:17,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:17,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139183682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:17,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:17,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:17,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063113193] [2022-03-03 19:12:17,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:17,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:17,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:17,941 INFO L87 Difference]: Start difference. First operand 326 states and 964 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:18,189 INFO L93 Difference]: Finished difference Result 530 states and 1536 transitions. [2022-03-03 19:12:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:12:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:18,190 INFO L225 Difference]: With dead ends: 530 [2022-03-03 19:12:18,190 INFO L226 Difference]: Without dead ends: 520 [2022-03-03 19:12:18,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:12:18,190 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:18,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 197 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-03 19:12:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 323. [2022-03-03 19:12:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9565217391304346) internal successors, (952), 322 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 952 transitions. [2022-03-03 19:12:18,194 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 952 transitions. Word has length 22 [2022-03-03 19:12:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:18,194 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 952 transitions. [2022-03-03 19:12:18,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 952 transitions. [2022-03-03 19:12:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:18,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:18,195 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] [2022-03-03 19:12:18,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:18,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-03-03 19:12:18,411 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:18,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1375118167, now seen corresponding path program 164 times [2022-03-03 19:12:18,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:18,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033064201] [2022-03-03 19:12:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:18,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:18,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033064201] [2022-03-03 19:12:18,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033064201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:18,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919356796] [2022-03-03 19:12:18,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:18,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:18,474 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) [2022-03-03 19:12:18,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-03 19:12:18,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:18,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:18,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:18,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:18,931 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:18,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:18,933 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 [2022-03-03 19:12:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:18,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919356796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:18,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:18,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:18,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278143915] [2022-03-03 19:12:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:18,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:18,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:18,936 INFO L87 Difference]: Start difference. First operand 323 states and 952 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:19,136 INFO L93 Difference]: Finished difference Result 481 states and 1408 transitions. [2022-03-03 19:12:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:19,136 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 [2022-03-03 19:12:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:19,137 INFO L225 Difference]: With dead ends: 481 [2022-03-03 19:12:19,137 INFO L226 Difference]: Without dead ends: 461 [2022-03-03 19:12:19,137 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 [2022-03-03 19:12:19,137 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:19,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 177 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-03 19:12:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 320. [2022-03-03 19:12:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2022-03-03 19:12:19,141 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2022-03-03 19:12:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:19,141 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2022-03-03 19:12:19,141 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) [2022-03-03 19:12:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2022-03-03 19:12:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:19,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:19,141 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] [2022-03-03 19:12:19,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:19,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-03 19:12:19,358 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1214196745, now seen corresponding path program 165 times [2022-03-03 19:12:19,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:19,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435419383] [2022-03-03 19:12:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:19,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:19,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:19,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435419383] [2022-03-03 19:12:19,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435419383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:19,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156267185] [2022-03-03 19:12:19,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:19,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:19,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:19,431 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) [2022-03-03 19:12:19,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-03 19:12:19,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:12:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:19,727 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 20 treesize of output 14 [2022-03-03 19:12:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:19,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:19,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:19,908 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:19,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:19,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:12:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:19,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156267185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:19,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:19,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:19,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393661749] [2022-03-03 19:12:19,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:19,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:19,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:19,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:19,913 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:20,116 INFO L93 Difference]: Finished difference Result 591 states and 1707 transitions. [2022-03-03 19:12:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:20,116 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 [2022-03-03 19:12:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:20,117 INFO L225 Difference]: With dead ends: 591 [2022-03-03 19:12:20,117 INFO L226 Difference]: Without dead ends: 591 [2022-03-03 19:12:20,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:12:20,117 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:20,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 160 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-03 19:12:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 332. [2022-03-03 19:12:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.984894259818731) internal successors, (988), 331 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 988 transitions. [2022-03-03 19:12:20,121 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 988 transitions. Word has length 22 [2022-03-03 19:12:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:20,121 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 988 transitions. [2022-03-03 19:12:20,122 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) [2022-03-03 19:12:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 988 transitions. [2022-03-03 19:12:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:20,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:20,122 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] [2022-03-03 19:12:20,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-03 19:12:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-03 19:12:20,339 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 280406219, now seen corresponding path program 166 times [2022-03-03 19:12:20,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:20,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970664907] [2022-03-03 19:12:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:20,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:20,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970664907] [2022-03-03 19:12:20,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970664907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:20,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988709807] [2022-03-03 19:12:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:20,413 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) [2022-03-03 19:12:20,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-03 19:12:20,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:20,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:20,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:20,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:20,741 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 20 treesize of output 14 [2022-03-03 19:12:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:20,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:20,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:20,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:20,969 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:20,970 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 [2022-03-03 19:12:20,971 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 [2022-03-03 19:12:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:20,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988709807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:20,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:20,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:20,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780566193] [2022-03-03 19:12:20,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:20,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:20,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:20,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:20,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:20,976 INFO L87 Difference]: Start difference. First operand 332 states and 988 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:21,239 INFO L93 Difference]: Finished difference Result 534 states and 1552 transitions. [2022-03-03 19:12:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:21,240 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 [2022-03-03 19:12:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:21,240 INFO L225 Difference]: With dead ends: 534 [2022-03-03 19:12:21,240 INFO L226 Difference]: Without dead ends: 524 [2022-03-03 19:12:21,241 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 [2022-03-03 19:12:21,241 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 133 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:21,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 156 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-03 19:12:21,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 339. [2022-03-03 19:12:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.964497041420118) internal successors, (1002), 338 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1002 transitions. [2022-03-03 19:12:21,245 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1002 transitions. Word has length 22 [2022-03-03 19:12:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:21,245 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1002 transitions. [2022-03-03 19:12:21,245 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) [2022-03-03 19:12:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1002 transitions. [2022-03-03 19:12:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:21,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:21,245 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] [2022-03-03 19:12:21,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:21,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:21,454 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -38706101, now seen corresponding path program 167 times [2022-03-03 19:12:21,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:21,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979727289] [2022-03-03 19:12:21,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:21,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:21,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979727289] [2022-03-03 19:12:21,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979727289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:21,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443021629] [2022-03-03 19:12:21,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:21,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:21,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:21,514 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) [2022-03-03 19:12:21,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-03 19:12:21,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:21,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:21,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:21,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:21,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:21,932 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 18 treesize of output 22 [2022-03-03 19:12:21,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:21,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:21,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:12:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:22,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443021629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:22,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:22,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:22,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548026423] [2022-03-03 19:12:22,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:22,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:22,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:22,003 INFO L87 Difference]: Start difference. First operand 339 states and 1002 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:22,165 INFO L93 Difference]: Finished difference Result 458 states and 1354 transitions. [2022-03-03 19:12:22,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:22,165 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 [2022-03-03 19:12:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:22,166 INFO L225 Difference]: With dead ends: 458 [2022-03-03 19:12:22,166 INFO L226 Difference]: Without dead ends: 458 [2022-03-03 19:12:22,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:12:22,166 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:22,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-03-03 19:12:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 311. [2022-03-03 19:12:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.945161290322581) internal successors, (913), 310 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 913 transitions. [2022-03-03 19:12:22,170 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 913 transitions. Word has length 22 [2022-03-03 19:12:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:22,170 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 913 transitions. [2022-03-03 19:12:22,170 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) [2022-03-03 19:12:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 913 transitions. [2022-03-03 19:12:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:22,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:22,171 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] [2022-03-03 19:12:22,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:22,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:22,385 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:22,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1499669411, now seen corresponding path program 168 times [2022-03-03 19:12:22,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:22,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525942203] [2022-03-03 19:12:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:22,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:22,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525942203] [2022-03-03 19:12:22,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525942203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:22,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028239096] [2022-03-03 19:12:22,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:22,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:22,446 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) [2022-03-03 19:12:22,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-03 19:12:22,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:12:22,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:22,710 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 50 treesize of output 40 [2022-03-03 19:12:22,819 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 31 treesize of output 23 [2022-03-03 19:12:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:22,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:22,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:22,934 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 47 treesize of output 45 [2022-03-03 19:12:23,033 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:23,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:23,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:23,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028239096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:23,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:23,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:23,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945804195] [2022-03-03 19:12:23,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:23,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:23,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:23,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:23,038 INFO L87 Difference]: Start difference. First operand 311 states and 913 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:23,269 INFO L93 Difference]: Finished difference Result 493 states and 1438 transitions. [2022-03-03 19:12:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:23,269 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 [2022-03-03 19:12:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:23,270 INFO L225 Difference]: With dead ends: 493 [2022-03-03 19:12:23,270 INFO L226 Difference]: Without dead ends: 493 [2022-03-03 19:12:23,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:12:23,270 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 137 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:23,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 187 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-03-03 19:12:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 321. [2022-03-03 19:12:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.978125) internal successors, (953), 320 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 953 transitions. [2022-03-03 19:12:23,299 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 953 transitions. Word has length 22 [2022-03-03 19:12:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:23,299 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 953 transitions. [2022-03-03 19:12:23,299 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) [2022-03-03 19:12:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 953 transitions. [2022-03-03 19:12:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:23,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:23,299 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] [2022-03-03 19:12:23,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:23,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:23,515 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:23,516 INFO L85 PathProgramCache]: Analyzing trace with hash -5066447, now seen corresponding path program 169 times [2022-03-03 19:12:23,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:23,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993962336] [2022-03-03 19:12:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:23,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:23,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993962336] [2022-03-03 19:12:23,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993962336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:23,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378696369] [2022-03-03 19:12:23,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:23,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:23,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:23,592 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) [2022-03-03 19:12:23,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-03 19:12:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:23,878 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 50 treesize of output 40 [2022-03-03 19:12:24,032 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 39 treesize of output 31 [2022-03-03 19:12:24,034 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 35 treesize of output 27 [2022-03-03 19:12:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:24,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:24,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:24,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:24,253 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:24,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:24,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:24,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378696369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:24,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:24,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:24,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974468039] [2022-03-03 19:12:24,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:24,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:24,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:24,258 INFO L87 Difference]: Start difference. First operand 321 states and 953 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:24,576 INFO L93 Difference]: Finished difference Result 524 states and 1517 transitions. [2022-03-03 19:12:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:24,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:12:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:24,578 INFO L225 Difference]: With dead ends: 524 [2022-03-03 19:12:24,578 INFO L226 Difference]: Without dead ends: 514 [2022-03-03 19:12:24,578 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 [2022-03-03 19:12:24,578 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:24,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 230 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-03 19:12:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 318. [2022-03-03 19:12:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2022-03-03 19:12:24,584 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2022-03-03 19:12:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:24,584 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2022-03-03 19:12:24,585 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) [2022-03-03 19:12:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2022-03-03 19:12:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:24,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:24,588 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] [2022-03-03 19:12:24,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-03 19:12:24,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:24,795 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash 419880763, now seen corresponding path program 170 times [2022-03-03 19:12:24,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:24,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747794456] [2022-03-03 19:12:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:24,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:24,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747794456] [2022-03-03 19:12:24,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747794456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:24,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015178299] [2022-03-03 19:12:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:24,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:24,849 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) [2022-03-03 19:12:24,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-03 19:12:25,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:25,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:25,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:12:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:25,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:25,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:25,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:25,420 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:25,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:25,421 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 [2022-03-03 19:12:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:25,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015178299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:25,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:25,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:25,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124571489] [2022-03-03 19:12:25,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:25,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:25,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:25,424 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:25,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:25,664 INFO L93 Difference]: Finished difference Result 485 states and 1415 transitions. [2022-03-03 19:12:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:25,664 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 [2022-03-03 19:12:25,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:25,665 INFO L225 Difference]: With dead ends: 485 [2022-03-03 19:12:25,665 INFO L226 Difference]: Without dead ends: 465 [2022-03-03 19:12:25,665 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 [2022-03-03 19:12:25,665 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:25,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 172 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-03 19:12:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 315. [2022-03-03 19:12:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.9585987261146496) internal successors, (929), 314 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 929 transitions. [2022-03-03 19:12:25,669 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 929 transitions. Word has length 22 [2022-03-03 19:12:25,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:25,669 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 929 transitions. [2022-03-03 19:12:25,669 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) [2022-03-03 19:12:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 929 transitions. [2022-03-03 19:12:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:25,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:25,670 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] [2022-03-03 19:12:25,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:25,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-03 19:12:25,887 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash -203057903, now seen corresponding path program 171 times [2022-03-03 19:12:25,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:25,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763694977] [2022-03-03 19:12:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:25,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:25,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:25,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763694977] [2022-03-03 19:12:25,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763694977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:25,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223990712] [2022-03-03 19:12:25,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:25,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:25,949 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) [2022-03-03 19:12:25,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-03 19:12:26,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:12:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:26,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:26,240 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 50 treesize of output 40 [2022-03-03 19:12:26,307 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 45 treesize of output 35 [2022-03-03 19:12:26,309 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 39 treesize of output 33 [2022-03-03 19:12:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:26,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:26,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:26,463 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 47 treesize of output 45 [2022-03-03 19:12:26,552 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:26,552 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 [2022-03-03 19:12:26,553 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 [2022-03-03 19:12:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:26,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223990712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:26,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:26,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:26,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768268595] [2022-03-03 19:12:26,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:26,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:26,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:26,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:26,557 INFO L87 Difference]: Start difference. First operand 315 states and 929 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:26,779 INFO L93 Difference]: Finished difference Result 611 states and 1774 transitions. [2022-03-03 19:12:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:26,779 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 [2022-03-03 19:12:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:26,780 INFO L225 Difference]: With dead ends: 611 [2022-03-03 19:12:26,780 INFO L226 Difference]: Without dead ends: 611 [2022-03-03 19:12:26,781 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 [2022-03-03 19:12:26,781 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 287 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:26,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 146 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-03 19:12:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 325. [2022-03-03 19:12:26,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 3.0123456790123457) internal successors, (976), 324 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 976 transitions. [2022-03-03 19:12:26,785 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 976 transitions. Word has length 22 [2022-03-03 19:12:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:26,811 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 976 transitions. [2022-03-03 19:12:26,811 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) [2022-03-03 19:12:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 976 transitions. [2022-03-03 19:12:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:26,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:26,812 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] [2022-03-03 19:12:26,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:27,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:27,028 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1291545061, now seen corresponding path program 172 times [2022-03-03 19:12:27,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:27,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881312645] [2022-03-03 19:12:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:27,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:27,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:27,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881312645] [2022-03-03 19:12:27,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881312645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:27,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589263865] [2022-03-03 19:12:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:27,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:27,082 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) [2022-03-03 19:12:27,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-03 19:12:27,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:27,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:27,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:27,343 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 50 treesize of output 40 [2022-03-03 19:12:27,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:27,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:12:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:27,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:27,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:27,530 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 47 treesize of output 45 [2022-03-03 19:12:27,626 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:27,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:27,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:27,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589263865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:27,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:27,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:27,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746805578] [2022-03-03 19:12:27,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:27,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:27,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:27,632 INFO L87 Difference]: Start difference. First operand 325 states and 976 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:27,964 INFO L93 Difference]: Finished difference Result 653 states and 1876 transitions. [2022-03-03 19:12:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:27,965 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 [2022-03-03 19:12:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:27,966 INFO L225 Difference]: With dead ends: 653 [2022-03-03 19:12:27,966 INFO L226 Difference]: Without dead ends: 643 [2022-03-03 19:12:27,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:12:27,966 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 218 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:27,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 217 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-03-03 19:12:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 332. [2022-03-03 19:12:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.990936555891239) internal successors, (990), 331 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 990 transitions. [2022-03-03 19:12:27,970 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 990 transitions. Word has length 22 [2022-03-03 19:12:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:27,970 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 990 transitions. [2022-03-03 19:12:27,970 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) [2022-03-03 19:12:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 990 transitions. [2022-03-03 19:12:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:27,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:27,971 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] [2022-03-03 19:12:27,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:28,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:28,188 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1962347043, now seen corresponding path program 173 times [2022-03-03 19:12:28,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:28,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595200827] [2022-03-03 19:12:28,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:28,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:28,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595200827] [2022-03-03 19:12:28,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595200827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:28,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394736756] [2022-03-03 19:12:28,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:28,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:28,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:28,272 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) [2022-03-03 19:12:28,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-03 19:12:28,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:12:28,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:28,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:12:28,714 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 45 treesize of output 35 [2022-03-03 19:12:28,715 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 39 treesize of output 33 [2022-03-03 19:12:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:28,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:28,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:28,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:29,010 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:29,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:29,012 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 [2022-03-03 19:12:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:29,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394736756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:29,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:29,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:29,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904338842] [2022-03-03 19:12:29,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:29,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:29,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:29,016 INFO L87 Difference]: Start difference. First operand 332 states and 990 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:29,370 INFO L93 Difference]: Finished difference Result 694 states and 1955 transitions. [2022-03-03 19:12:29,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:29,370 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 [2022-03-03 19:12:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:29,371 INFO L225 Difference]: With dead ends: 694 [2022-03-03 19:12:29,371 INFO L226 Difference]: Without dead ends: 694 [2022-03-03 19:12:29,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:12:29,371 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 171 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:29,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 225 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-03-03 19:12:29,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 323. [2022-03-03 19:12:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2022-03-03 19:12:29,376 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 22 [2022-03-03 19:12:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:29,376 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2022-03-03 19:12:29,376 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) [2022-03-03 19:12:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2022-03-03 19:12:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:29,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:29,376 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] [2022-03-03 19:12:29,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:29,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-03-03 19:12:29,577 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:29,577 INFO L85 PathProgramCache]: Analyzing trace with hash 255790949, now seen corresponding path program 174 times [2022-03-03 19:12:29,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:29,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997361841] [2022-03-03 19:12:29,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:29,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:29,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997361841] [2022-03-03 19:12:29,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997361841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:29,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430043408] [2022-03-03 19:12:29,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:29,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:29,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:29,683 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) [2022-03-03 19:12:29,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-03 19:12:29,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:12:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:30,009 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 50 treesize of output 40 [2022-03-03 19:12:30,166 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 45 treesize of output 37 [2022-03-03 19:12:30,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-03 19:12:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:30,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:30,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:30,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:30,521 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:30,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:30,523 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 [2022-03-03 19:12:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:30,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430043408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:30,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:30,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:30,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900550121] [2022-03-03 19:12:30,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:30,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:30,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:30,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:30,526 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:30,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:30,713 INFO L93 Difference]: Finished difference Result 535 states and 1535 transitions. [2022-03-03 19:12:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:30,713 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 [2022-03-03 19:12:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:30,714 INFO L225 Difference]: With dead ends: 535 [2022-03-03 19:12:30,714 INFO L226 Difference]: Without dead ends: 526 [2022-03-03 19:12:30,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:30,714 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:30,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 151 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-03-03 19:12:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 329. [2022-03-03 19:12:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2022-03-03 19:12:30,718 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 22 [2022-03-03 19:12:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:30,718 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2022-03-03 19:12:30,718 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) [2022-03-03 19:12:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2022-03-03 19:12:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:30,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:30,719 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] [2022-03-03 19:12:30,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:30,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:30,935 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash 598040443, now seen corresponding path program 175 times [2022-03-03 19:12:30,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:30,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097698401] [2022-03-03 19:12:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:30,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:30,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097698401] [2022-03-03 19:12:30,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097698401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:30,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209323183] [2022-03-03 19:12:30,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:30,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:30,995 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) [2022-03-03 19:12:30,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-03 19:12:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:31,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:31,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:31,299 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 50 treesize of output 40 [2022-03-03 19:12:31,513 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 47 treesize of output 39 [2022-03-03 19:12:31,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-03 19:12:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:31,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:31,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:31,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:31,874 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:31,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:31,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:31,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209323183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:31,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:31,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:31,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154072654] [2022-03-03 19:12:31,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:31,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:31,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:31,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:31,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:31,885 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:32,446 INFO L93 Difference]: Finished difference Result 635 states and 1773 transitions. [2022-03-03 19:12:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:32,446 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 [2022-03-03 19:12:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:32,447 INFO L225 Difference]: With dead ends: 635 [2022-03-03 19:12:32,447 INFO L226 Difference]: Without dead ends: 625 [2022-03-03 19:12:32,448 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 [2022-03-03 19:12:32,448 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 180 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:32,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 219 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-03 19:12:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 351. [2022-03-03 19:12:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.974285714285714) internal successors, (1041), 350 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1041 transitions. [2022-03-03 19:12:32,453 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1041 transitions. Word has length 22 [2022-03-03 19:12:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:32,453 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 1041 transitions. [2022-03-03 19:12:32,453 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) [2022-03-03 19:12:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1041 transitions. [2022-03-03 19:12:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:32,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:32,453 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] [2022-03-03 19:12:32,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:32,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:32,675 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -982731473, now seen corresponding path program 176 times [2022-03-03 19:12:32,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:32,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062682625] [2022-03-03 19:12:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:32,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:32,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062682625] [2022-03-03 19:12:32,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062682625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:32,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506051372] [2022-03-03 19:12:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:32,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:32,774 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) [2022-03-03 19:12:32,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-03 19:12:32,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:32,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:32,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:33,072 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 50 treesize of output 40 [2022-03-03 19:12:33,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:33,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:33,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:33,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:33,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:33,449 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:33,449 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:33,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:33,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506051372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:33,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:33,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:33,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116884203] [2022-03-03 19:12:33,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:33,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:33,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:33,455 INFO L87 Difference]: Start difference. First operand 351 states and 1041 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:33,867 INFO L93 Difference]: Finished difference Result 592 states and 1662 transitions. [2022-03-03 19:12:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:33,868 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 [2022-03-03 19:12:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:33,869 INFO L225 Difference]: With dead ends: 592 [2022-03-03 19:12:33,869 INFO L226 Difference]: Without dead ends: 580 [2022-03-03 19:12:33,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:12:33,869 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:33,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 242 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-03-03 19:12:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 331. [2022-03-03 19:12:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9727272727272727) internal successors, (981), 330 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 981 transitions. [2022-03-03 19:12:33,873 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 981 transitions. Word has length 22 [2022-03-03 19:12:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 981 transitions. [2022-03-03 19:12:33,873 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) [2022-03-03 19:12:33,873 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 981 transitions. [2022-03-03 19:12:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:33,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:33,874 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] [2022-03-03 19:12:33,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:34,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:34,090 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash 396074085, now seen corresponding path program 177 times [2022-03-03 19:12:34,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:34,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676292419] [2022-03-03 19:12:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:34,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:34,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676292419] [2022-03-03 19:12:34,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676292419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:34,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106271757] [2022-03-03 19:12:34,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:34,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:34,153 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) [2022-03-03 19:12:34,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-03 19:12:34,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:12:34,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:34,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:34,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:12:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:34,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:34,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:34,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:34,742 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:34,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:34,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:34,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106271757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:34,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:34,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:34,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323894595] [2022-03-03 19:12:34,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:34,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:34,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:34,747 INFO L87 Difference]: Start difference. First operand 331 states and 981 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:35,045 INFO L93 Difference]: Finished difference Result 460 states and 1345 transitions. [2022-03-03 19:12:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:35,045 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 [2022-03-03 19:12:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:35,046 INFO L225 Difference]: With dead ends: 460 [2022-03-03 19:12:35,046 INFO L226 Difference]: Without dead ends: 440 [2022-03-03 19:12:35,046 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 [2022-03-03 19:12:35,046 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:35,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 158 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:35,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-03 19:12:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 337. [2022-03-03 19:12:35,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9583333333333335) internal successors, (994), 336 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 994 transitions. [2022-03-03 19:12:35,050 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 994 transitions. Word has length 22 [2022-03-03 19:12:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:35,050 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 994 transitions. [2022-03-03 19:12:35,050 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) [2022-03-03 19:12:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 994 transitions. [2022-03-03 19:12:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:35,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:35,050 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] [2022-03-03 19:12:35,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:35,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:35,267 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:35,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1363215055, now seen corresponding path program 178 times [2022-03-03 19:12:35,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:35,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898860594] [2022-03-03 19:12:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:35,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:35,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898860594] [2022-03-03 19:12:35,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898860594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:35,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138889234] [2022-03-03 19:12:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:35,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:35,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:35,346 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) [2022-03-03 19:12:35,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-03 19:12:35,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:35,656 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 50 treesize of output 40 [2022-03-03 19:12:35,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-03 19:12:35,816 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 26 treesize of output 20 [2022-03-03 19:12:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:35,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:35,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:35,960 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 47 treesize of output 45 [2022-03-03 19:12:36,122 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:36,123 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 8 treesize of output 7 [2022-03-03 19:12:36,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:36,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138889234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:36,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:36,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:36,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435907187] [2022-03-03 19:12:36,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:36,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:36,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:36,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:36,131 INFO L87 Difference]: Start difference. First operand 337 states and 994 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:36,553 INFO L93 Difference]: Finished difference Result 538 states and 1523 transitions. [2022-03-03 19:12:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:12:36,554 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 [2022-03-03 19:12:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:36,555 INFO L225 Difference]: With dead ends: 538 [2022-03-03 19:12:36,555 INFO L226 Difference]: Without dead ends: 528 [2022-03-03 19:12:36,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:12:36,555 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 187 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:36,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 188 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-03 19:12:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 359. [2022-03-03 19:12:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.9553072625698324) internal successors, (1058), 358 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1058 transitions. [2022-03-03 19:12:36,559 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1058 transitions. Word has length 22 [2022-03-03 19:12:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:36,559 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1058 transitions. [2022-03-03 19:12:36,559 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) [2022-03-03 19:12:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1058 transitions. [2022-03-03 19:12:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:36,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:36,560 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] [2022-03-03 19:12:36,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:36,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:36,774 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:36,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1350980325, now seen corresponding path program 179 times [2022-03-03 19:12:36,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:36,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566559565] [2022-03-03 19:12:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:36,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:36,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:36,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566559565] [2022-03-03 19:12:36,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566559565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:36,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800960177] [2022-03-03 19:12:36,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:36,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:36,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:36,859 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) [2022-03-03 19:12:36,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-03 19:12:37,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:12:37,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:37,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:37,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:37,184 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 50 treesize of output 40 [2022-03-03 19:12:37,279 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 28 treesize of output 22 [2022-03-03 19:12:37,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-03 19:12:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:37,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:37,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-03 19:12:37,449 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:37,449 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 8 treesize of output 7 [2022-03-03 19:12:37,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:37,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800960177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:37,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:37,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:37,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871030716] [2022-03-03 19:12:37,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:37,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:37,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:37,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:37,454 INFO L87 Difference]: Start difference. First operand 359 states and 1058 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:37,694 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2022-03-03 19:12:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:37,694 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 [2022-03-03 19:12:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:37,695 INFO L225 Difference]: With dead ends: 495 [2022-03-03 19:12:37,695 INFO L226 Difference]: Without dead ends: 480 [2022-03-03 19:12:37,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:37,695 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:37,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 179 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-03-03 19:12:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 333. [2022-03-03 19:12:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.966867469879518) internal successors, (985), 332 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 985 transitions. [2022-03-03 19:12:37,704 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 985 transitions. Word has length 22 [2022-03-03 19:12:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:37,704 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 985 transitions. [2022-03-03 19:12:37,704 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) [2022-03-03 19:12:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 985 transitions. [2022-03-03 19:12:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:37,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:37,705 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] [2022-03-03 19:12:37,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-03 19:12:37,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:37,921 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -24051833, now seen corresponding path program 180 times [2022-03-03 19:12:37,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:37,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803521715] [2022-03-03 19:12:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:37,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:38,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:38,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803521715] [2022-03-03 19:12:38,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803521715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:38,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953806579] [2022-03-03 19:12:38,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:38,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:38,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:38,002 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) [2022-03-03 19:12:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-03 19:12:38,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:12:38,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:38,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:38,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:12:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:38,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:38,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:38,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:38,577 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:38,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:38,579 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 [2022-03-03 19:12:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:38,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953806579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:38,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:38,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:38,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543162528] [2022-03-03 19:12:38,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:38,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:38,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:38,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:38,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:38,582 INFO L87 Difference]: Start difference. First operand 333 states and 985 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:38,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:38,749 INFO L93 Difference]: Finished difference Result 476 states and 1373 transitions. [2022-03-03 19:12:38,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:38,749 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 [2022-03-03 19:12:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:38,750 INFO L225 Difference]: With dead ends: 476 [2022-03-03 19:12:38,750 INFO L226 Difference]: Without dead ends: 476 [2022-03-03 19:12:38,750 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 [2022-03-03 19:12:38,750 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:38,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 138 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-03 19:12:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 336. [2022-03-03 19:12:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.952238805970149) internal successors, (989), 335 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 989 transitions. [2022-03-03 19:12:38,754 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 989 transitions. Word has length 22 [2022-03-03 19:12:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:38,754 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 989 transitions. [2022-03-03 19:12:38,754 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) [2022-03-03 19:12:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 989 transitions. [2022-03-03 19:12:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:38,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:38,755 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] [2022-03-03 19:12:38,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-03 19:12:38,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-03-03 19:12:38,971 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1470551131, now seen corresponding path program 181 times [2022-03-03 19:12:38,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:38,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651140639] [2022-03-03 19:12:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:39,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:39,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651140639] [2022-03-03 19:12:39,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651140639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:39,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132439614] [2022-03-03 19:12:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:39,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:39,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:39,027 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) [2022-03-03 19:12:39,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-03 19:12:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:39,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:39,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:12:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:39,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:39,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:39,424 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 47 treesize of output 45 [2022-03-03 19:12:39,522 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:39,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:39,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:12:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:39,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132439614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:39,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:39,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:39,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547574240] [2022-03-03 19:12:39,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:39,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:39,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:39,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:39,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:39,527 INFO L87 Difference]: Start difference. First operand 336 states and 989 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:39,780 INFO L93 Difference]: Finished difference Result 507 states and 1449 transitions. [2022-03-03 19:12:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:39,780 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 [2022-03-03 19:12:39,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:39,780 INFO L225 Difference]: With dead ends: 507 [2022-03-03 19:12:39,781 INFO L226 Difference]: Without dead ends: 497 [2022-03-03 19:12:39,781 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 [2022-03-03 19:12:39,781 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:39,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 199 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-03 19:12:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 333. [2022-03-03 19:12:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9427710843373496) internal successors, (977), 332 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 977 transitions. [2022-03-03 19:12:39,785 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 977 transitions. Word has length 22 [2022-03-03 19:12:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:39,785 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 977 transitions. [2022-03-03 19:12:39,785 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) [2022-03-03 19:12:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 977 transitions. [2022-03-03 19:12:39,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:39,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:39,785 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] [2022-03-03 19:12:39,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:40,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:40,002 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1895498341, now seen corresponding path program 182 times [2022-03-03 19:12:40,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:40,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656232066] [2022-03-03 19:12:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:40,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:40,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656232066] [2022-03-03 19:12:40,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656232066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:40,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575058915] [2022-03-03 19:12:40,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:40,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:40,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:40,063 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) [2022-03-03 19:12:40,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-03 19:12:40,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:40,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:40,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:40,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:40,646 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:12:40,814 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:40,815 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 8 treesize of output 7 [2022-03-03 19:12:40,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:40,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575058915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:40,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:40,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:40,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787227567] [2022-03-03 19:12:40,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:40,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:40,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:40,822 INFO L87 Difference]: Start difference. First operand 333 states and 977 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:41,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:41,188 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2022-03-03 19:12:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:41,188 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 [2022-03-03 19:12:41,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:41,189 INFO L225 Difference]: With dead ends: 458 [2022-03-03 19:12:41,189 INFO L226 Difference]: Without dead ends: 438 [2022-03-03 19:12:41,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:41,189 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:41,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 208 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:41,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-03 19:12:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 315. [2022-03-03 19:12:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.945859872611465) internal successors, (925), 314 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 925 transitions. [2022-03-03 19:12:41,193 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 925 transitions. Word has length 22 [2022-03-03 19:12:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 925 transitions. [2022-03-03 19:12:41,193 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) [2022-03-03 19:12:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 925 transitions. [2022-03-03 19:12:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:41,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:41,193 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] [2022-03-03 19:12:41,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-03 19:12:41,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-03 19:12:41,401 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash -59659887, now seen corresponding path program 183 times [2022-03-03 19:12:41,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:41,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125070226] [2022-03-03 19:12:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:41,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:41,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125070226] [2022-03-03 19:12:41,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125070226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:41,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906719842] [2022-03-03 19:12:41,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:41,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:41,510 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) [2022-03-03 19:12:41,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-03 19:12:41,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:12:41,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:41,851 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 20 treesize of output 14 [2022-03-03 19:12:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:41,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:41,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:41,997 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 18 treesize of output 22 [2022-03-03 19:12:42,091 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:42,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:42,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:42,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906719842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:42,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:42,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:42,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330430731] [2022-03-03 19:12:42,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:42,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:42,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:42,097 INFO L87 Difference]: Start difference. First operand 315 states and 925 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:42,419 INFO L93 Difference]: Finished difference Result 535 states and 1557 transitions. [2022-03-03 19:12:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:42,420 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 [2022-03-03 19:12:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:42,421 INFO L225 Difference]: With dead ends: 535 [2022-03-03 19:12:42,421 INFO L226 Difference]: Without dead ends: 535 [2022-03-03 19:12:42,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:12:42,421 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:42,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 175 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-03-03 19:12:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 327. [2022-03-03 19:12:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9846625766871164) internal successors, (973), 326 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 973 transitions. [2022-03-03 19:12:42,425 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 973 transitions. Word has length 22 [2022-03-03 19:12:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:42,425 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 973 transitions. [2022-03-03 19:12:42,425 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) [2022-03-03 19:12:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 973 transitions. [2022-03-03 19:12:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:42,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:42,426 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] [2022-03-03 19:12:42,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:42,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-03 19:12:42,635 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:42,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1434943077, now seen corresponding path program 184 times [2022-03-03 19:12:42,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:42,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366782590] [2022-03-03 19:12:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:42,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:42,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366782590] [2022-03-03 19:12:42,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366782590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296716960] [2022-03-03 19:12:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:42,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:42,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:42,722 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) [2022-03-03 19:12:42,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-03 19:12:42,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:42,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:42,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:42,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:43,018 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 20 treesize of output 14 [2022-03-03 19:12:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:43,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:43,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:43,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:43,265 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:43,266 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 8 treesize of output 7 [2022-03-03 19:12:43,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:43,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296716960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:43,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:43,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:43,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678250144] [2022-03-03 19:12:43,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:43,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:43,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:43,272 INFO L87 Difference]: Start difference. First operand 327 states and 973 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:43,466 INFO L93 Difference]: Finished difference Result 511 states and 1483 transitions. [2022-03-03 19:12:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:43,466 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 [2022-03-03 19:12:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:43,468 INFO L225 Difference]: With dead ends: 511 [2022-03-03 19:12:43,468 INFO L226 Difference]: Without dead ends: 501 [2022-03-03 19:12:43,468 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 [2022-03-03 19:12:43,468 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:43,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 162 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-03-03 19:12:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 334. [2022-03-03 19:12:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.963963963963964) internal successors, (987), 333 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 987 transitions. [2022-03-03 19:12:43,472 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 987 transitions. Word has length 22 [2022-03-03 19:12:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 987 transitions. [2022-03-03 19:12:43,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 987 transitions. [2022-03-03 19:12:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:43,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:43,473 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] [2022-03-03 19:12:43,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:43,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-03 19:12:43,690 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:43,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1115830757, now seen corresponding path program 185 times [2022-03-03 19:12:43,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:43,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424437793] [2022-03-03 19:12:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:43,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:43,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:43,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424437793] [2022-03-03 19:12:43,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424437793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:43,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150330016] [2022-03-03 19:12:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:43,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:43,780 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) [2022-03-03 19:12:43,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-03 19:12:44,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:44,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:44,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:44,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:44,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:12:44,335 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:44,335 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 8 treesize of output 7 [2022-03-03 19:12:44,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:44,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150330016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:44,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:44,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:44,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073971860] [2022-03-03 19:12:44,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:44,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:44,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:44,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:44,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:44,341 INFO L87 Difference]: Start difference. First operand 334 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:44,554 INFO L93 Difference]: Finished difference Result 435 states and 1285 transitions. [2022-03-03 19:12:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:44,555 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 [2022-03-03 19:12:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:44,555 INFO L225 Difference]: With dead ends: 435 [2022-03-03 19:12:44,555 INFO L226 Difference]: Without dead ends: 435 [2022-03-03 19:12:44,555 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 [2022-03-03 19:12:44,556 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:44,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 187 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-03 19:12:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 312. [2022-03-03 19:12:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2022-03-03 19:12:44,560 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 22 [2022-03-03 19:12:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:44,560 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2022-03-03 19:12:44,560 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) [2022-03-03 19:12:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2022-03-03 19:12:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:44,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:44,561 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] [2022-03-03 19:12:44,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:44,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:44,777 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1546790043, now seen corresponding path program 186 times [2022-03-03 19:12:44,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:44,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38300636] [2022-03-03 19:12:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:44,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:44,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38300636] [2022-03-03 19:12:44,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38300636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:44,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102731258] [2022-03-03 19:12:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:44,867 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) [2022-03-03 19:12:44,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-03 19:12:45,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:12:45,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:45,150 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 29 treesize of output 23 [2022-03-03 19:12:45,219 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 60 treesize of output 48 [2022-03-03 19:12:45,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-03 19:12:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:45,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:45,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:45,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:12:45,493 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:45,493 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 8 treesize of output 7 [2022-03-03 19:12:45,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:45,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102731258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:45,497 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:45,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:45,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836672726] [2022-03-03 19:12:45,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:45,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:45,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:45,498 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:45,835 INFO L93 Difference]: Finished difference Result 691 states and 1976 transitions. [2022-03-03 19:12:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:45,835 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 [2022-03-03 19:12:45,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:45,836 INFO L225 Difference]: With dead ends: 691 [2022-03-03 19:12:45,836 INFO L226 Difference]: Without dead ends: 691 [2022-03-03 19:12:45,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:12:45,836 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:45,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 235 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-03 19:12:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 326. [2022-03-03 19:12:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.0123076923076924) internal successors, (979), 325 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 979 transitions. [2022-03-03 19:12:45,842 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 979 transitions. Word has length 22 [2022-03-03 19:12:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:45,842 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 979 transitions. [2022-03-03 19:12:45,842 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) [2022-03-03 19:12:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 979 transitions. [2022-03-03 19:12:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:45,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:45,843 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] [2022-03-03 19:12:45,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:46,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-03 19:12:46,060 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash -52187079, now seen corresponding path program 187 times [2022-03-03 19:12:46,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:46,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737202324] [2022-03-03 19:12:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:46,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:46,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:46,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737202324] [2022-03-03 19:12:46,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737202324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:46,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945183304] [2022-03-03 19:12:46,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:46,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:46,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:46,121 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) [2022-03-03 19:12:46,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-03 19:12:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:46,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:46,350 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 29 treesize of output 23 [2022-03-03 19:12:46,421 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 59 treesize of output 47 [2022-03-03 19:12:46,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-03-03 19:12:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:46,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:46,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:46,612 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 18 treesize of output 22 [2022-03-03 19:12:46,666 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:46,666 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 8 treesize of output 7 [2022-03-03 19:12:46,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:46,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945183304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:46,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:46,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:46,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394193704] [2022-03-03 19:12:46,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:46,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:46,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:46,671 INFO L87 Difference]: Start difference. First operand 326 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:46,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:46,968 INFO L93 Difference]: Finished difference Result 743 states and 2090 transitions. [2022-03-03 19:12:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:46,968 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 [2022-03-03 19:12:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:46,969 INFO L225 Difference]: With dead ends: 743 [2022-03-03 19:12:46,969 INFO L226 Difference]: Without dead ends: 733 [2022-03-03 19:12:46,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:12:46,970 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 258 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:46,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 198 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-03 19:12:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 333. [2022-03-03 19:12:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9909638554216866) internal successors, (993), 332 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 993 transitions. [2022-03-03 19:12:46,974 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 993 transitions. Word has length 22 [2022-03-03 19:12:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:46,975 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 993 transitions. [2022-03-03 19:12:46,975 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) [2022-03-03 19:12:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 993 transitions. [2022-03-03 19:12:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:46,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:46,975 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] [2022-03-03 19:12:46,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-03 19:12:47,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-03 19:12:47,192 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 988888113, now seen corresponding path program 188 times [2022-03-03 19:12:47,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:47,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072217702] [2022-03-03 19:12:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:47,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:47,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072217702] [2022-03-03 19:12:47,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072217702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:47,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031617650] [2022-03-03 19:12:47,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:47,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:47,252 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) [2022-03-03 19:12:47,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-03 19:12:47,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:47,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:47,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:47,550 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 29 treesize of output 23 [2022-03-03 19:12:47,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:47,632 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 51 treesize of output 41 [2022-03-03 19:12:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:47,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:47,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:47,851 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 18 treesize of output 22 [2022-03-03 19:12:47,914 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:47,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:47,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:47,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031617650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:47,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:47,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:47,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348890576] [2022-03-03 19:12:47,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:47,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:47,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:47,920 INFO L87 Difference]: Start difference. First operand 333 states and 993 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:48,248 INFO L93 Difference]: Finished difference Result 700 states and 2006 transitions. [2022-03-03 19:12:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:12:48,248 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 [2022-03-03 19:12:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:48,250 INFO L225 Difference]: With dead ends: 700 [2022-03-03 19:12:48,250 INFO L226 Difference]: Without dead ends: 700 [2022-03-03 19:12:48,250 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 [2022-03-03 19:12:48,250 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 250 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:48,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 174 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-03-03 19:12:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 339. [2022-03-03 19:12:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0177514792899407) internal successors, (1020), 338 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1020 transitions. [2022-03-03 19:12:48,255 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1020 transitions. Word has length 22 [2022-03-03 19:12:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:48,255 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1020 transitions. [2022-03-03 19:12:48,255 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) [2022-03-03 19:12:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1020 transitions. [2022-03-03 19:12:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:48,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:48,255 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] [2022-03-03 19:12:48,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:48,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-03 19:12:48,472 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1087941191, now seen corresponding path program 189 times [2022-03-03 19:12:48,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:48,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795566355] [2022-03-03 19:12:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:48,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:48,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795566355] [2022-03-03 19:12:48,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795566355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:48,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564643918] [2022-03-03 19:12:48,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:48,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:48,530 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) [2022-03-03 19:12:48,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-03 19:12:48,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:12:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:48,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:12:48,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-03 19:12:48,902 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 52 treesize of output 42 [2022-03-03 19:12:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:48,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:49,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:49,113 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 18 treesize of output 22 [2022-03-03 19:12:49,174 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:49,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:49,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:12:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:49,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564643918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:49,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:49,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:49,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701684051] [2022-03-03 19:12:49,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:49,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:49,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:49,181 INFO L87 Difference]: Start difference. First operand 339 states and 1020 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:49,515 INFO L93 Difference]: Finished difference Result 649 states and 1853 transitions. [2022-03-03 19:12:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:49,515 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 [2022-03-03 19:12:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:49,516 INFO L225 Difference]: With dead ends: 649 [2022-03-03 19:12:49,516 INFO L226 Difference]: Without dead ends: 640 [2022-03-03 19:12:49,517 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 [2022-03-03 19:12:49,517 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 211 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:49,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 154 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-03 19:12:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2022-03-03 19:12:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 3.0) internal successors, (1032), 344 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1032 transitions. [2022-03-03 19:12:49,521 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1032 transitions. Word has length 22 [2022-03-03 19:12:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:49,522 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 1032 transitions. [2022-03-03 19:12:49,522 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) [2022-03-03 19:12:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1032 transitions. [2022-03-03 19:12:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:49,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:49,522 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] [2022-03-03 19:12:49,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:49,723 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash -745691697, now seen corresponding path program 190 times [2022-03-03 19:12:49,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:49,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899448431] [2022-03-03 19:12:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:49,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:49,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899448431] [2022-03-03 19:12:49,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899448431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:49,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621827854] [2022-03-03 19:12:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:49,782 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) [2022-03-03 19:12:49,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-03 19:12:50,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:50,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:12:50,142 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 59 treesize of output 47 [2022-03-03 19:12:50,143 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 51 treesize of output 41 [2022-03-03 19:12:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:50,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:50,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:50,282 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 18 treesize of output 22 [2022-03-03 19:12:50,325 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:50,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:50,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:50,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621827854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:50,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:50,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:50,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147301449] [2022-03-03 19:12:50,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:50,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:50,330 INFO L87 Difference]: Start difference. First operand 345 states and 1032 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:50,575 INFO L93 Difference]: Finished difference Result 662 states and 1863 transitions. [2022-03-03 19:12:50,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:12:50,575 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 [2022-03-03 19:12:50,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:50,576 INFO L225 Difference]: With dead ends: 662 [2022-03-03 19:12:50,576 INFO L226 Difference]: Without dead ends: 652 [2022-03-03 19:12:50,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:50,577 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 193 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:50,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 162 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:12:50,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-03-03 19:12:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 357. [2022-03-03 19:12:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.00561797752809) internal successors, (1070), 356 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2022-03-03 19:12:50,582 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 22 [2022-03-03 19:12:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:50,582 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2022-03-03 19:12:50,582 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) [2022-03-03 19:12:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2022-03-03 19:12:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:50,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:50,582 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] [2022-03-03 19:12:50,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:50,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:50,799 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:50,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1968503683, now seen corresponding path program 191 times [2022-03-03 19:12:50,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:50,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973441610] [2022-03-03 19:12:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:50,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:50,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973441610] [2022-03-03 19:12:50,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973441610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:50,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853806075] [2022-03-03 19:12:50,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:12:50,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:50,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:50,892 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) [2022-03-03 19:12:50,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-03 19:12:51,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:12:51,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:51,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:51,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:51,223 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 29 treesize of output 23 [2022-03-03 19:12:51,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:51,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-03 19:12:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:51,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:51,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:51,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:12:51,600 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:51,600 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 8 treesize of output 7 [2022-03-03 19:12:51,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:51,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853806075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:51,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:51,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:12:51,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583255455] [2022-03-03 19:12:51,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:51,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:12:51,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:51,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:12:51,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:12:51,607 INFO L87 Difference]: Start difference. First operand 357 states and 1070 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:51,951 INFO L93 Difference]: Finished difference Result 576 states and 1655 transitions. [2022-03-03 19:12:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:51,951 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 [2022-03-03 19:12:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:51,952 INFO L225 Difference]: With dead ends: 576 [2022-03-03 19:12:51,952 INFO L226 Difference]: Without dead ends: 564 [2022-03-03 19:12:51,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:51,953 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:51,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 178 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:51,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-03 19:12:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 353. [2022-03-03 19:12:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0056818181818183) internal successors, (1058), 352 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1058 transitions. [2022-03-03 19:12:51,959 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1058 transitions. Word has length 22 [2022-03-03 19:12:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:51,959 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1058 transitions. [2022-03-03 19:12:51,959 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) [2022-03-03 19:12:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1058 transitions. [2022-03-03 19:12:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:51,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:51,960 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] [2022-03-03 19:12:51,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-03 19:12:52,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:52,175 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1687399163, now seen corresponding path program 192 times [2022-03-03 19:12:52,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:52,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365987487] [2022-03-03 19:12:52,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:52,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:52,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:52,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365987487] [2022-03-03 19:12:52,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365987487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:52,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688287888] [2022-03-03 19:12:52,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:12:52,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:52,277 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) [2022-03-03 19:12:52,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-03 19:12:52,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:12:52,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:52,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:52,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:12:52,768 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 20 treesize of output 14 [2022-03-03 19:12:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:52,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:53,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:53,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:12:53,159 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:53,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:53,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:53,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688287888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:53,166 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:53,166 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:12:53,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253426679] [2022-03-03 19:12:53,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:53,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:12:53,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:12:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:12:53,167 INFO L87 Difference]: Start difference. First operand 353 states and 1058 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:53,535 INFO L93 Difference]: Finished difference Result 575 states and 1670 transitions. [2022-03-03 19:12:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:12:53,536 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 [2022-03-03 19:12:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:53,536 INFO L225 Difference]: With dead ends: 575 [2022-03-03 19:12:53,537 INFO L226 Difference]: Without dead ends: 575 [2022-03-03 19:12:53,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:12:53,537 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 152 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:53,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 175 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-03-03 19:12:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 358. [2022-03-03 19:12:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2022-03-03 19:12:53,541 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2022-03-03 19:12:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:53,541 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2022-03-03 19:12:53,541 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) [2022-03-03 19:12:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2022-03-03 19:12:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:53,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:53,542 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] [2022-03-03 19:12:53,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-03 19:12:53,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-03 19:12:53,758 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1112965169, now seen corresponding path program 193 times [2022-03-03 19:12:53,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:53,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142254006] [2022-03-03 19:12:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:53,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:53,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:53,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142254006] [2022-03-03 19:12:53,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142254006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:53,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48937351] [2022-03-03 19:12:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:12:53,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:53,844 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) [2022-03-03 19:12:53,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-03 19:12:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:54,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:54,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:12:54,241 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 55 treesize of output 45 [2022-03-03 19:12:54,242 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 49 treesize of output 37 [2022-03-03 19:12:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:54,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:54,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:54,443 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 18 treesize of output 22 [2022-03-03 19:12:54,509 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:54,509 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 8 treesize of output 7 [2022-03-03 19:12:54,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:54,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48937351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:54,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:54,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:54,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819243169] [2022-03-03 19:12:54,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:54,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:54,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:54,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:54,516 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:54,795 INFO L93 Difference]: Finished difference Result 551 states and 1605 transitions. [2022-03-03 19:12:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:54,795 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 [2022-03-03 19:12:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:54,796 INFO L225 Difference]: With dead ends: 551 [2022-03-03 19:12:54,796 INFO L226 Difference]: Without dead ends: 541 [2022-03-03 19:12:54,796 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 [2022-03-03 19:12:54,796 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:54,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 174 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:12:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-03 19:12:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 337. [2022-03-03 19:12:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9702380952380953) internal successors, (998), 336 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 998 transitions. [2022-03-03 19:12:54,800 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 998 transitions. Word has length 22 [2022-03-03 19:12:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:54,800 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 998 transitions. [2022-03-03 19:12:54,800 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) [2022-03-03 19:12:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 998 transitions. [2022-03-03 19:12:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:54,801 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:54,801 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] [2022-03-03 19:12:54,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:55,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-03 19:12:55,017 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1638885455, now seen corresponding path program 194 times [2022-03-03 19:12:55,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:55,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148279704] [2022-03-03 19:12:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:55,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:55,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148279704] [2022-03-03 19:12:55,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148279704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:55,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002854043] [2022-03-03 19:12:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:12:55,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:55,113 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) [2022-03-03 19:12:55,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-03 19:12:55,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:12:55,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:55,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:55,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:55,426 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 29 treesize of output 23 [2022-03-03 19:12:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:55,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:55,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:55,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:12:55,801 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:55,801 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 8 treesize of output 7 [2022-03-03 19:12:55,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:55,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002854043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:55,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:55,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:55,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516666192] [2022-03-03 19:12:55,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:55,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:55,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:55,808 INFO L87 Difference]: Start difference. First operand 337 states and 998 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:56,180 INFO L93 Difference]: Finished difference Result 480 states and 1423 transitions. [2022-03-03 19:12:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:56,180 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 [2022-03-03 19:12:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:56,181 INFO L225 Difference]: With dead ends: 480 [2022-03-03 19:12:56,181 INFO L226 Difference]: Without dead ends: 480 [2022-03-03 19:12:56,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:56,181 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-03-03 19:12:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 334. [2022-03-03 19:12:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.96996996996997) internal successors, (989), 333 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 989 transitions. [2022-03-03 19:12:56,185 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 989 transitions. Word has length 22 [2022-03-03 19:12:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:56,185 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 989 transitions. [2022-03-03 19:12:56,185 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) [2022-03-03 19:12:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 989 transitions. [2022-03-03 19:12:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:56,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:56,186 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] [2022-03-03 19:12:56,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-03 19:12:56,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-03 19:12:56,395 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1132668067, now seen corresponding path program 195 times [2022-03-03 19:12:56,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:56,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759645522] [2022-03-03 19:12:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:56,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:56,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759645522] [2022-03-03 19:12:56,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759645522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:56,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340931752] [2022-03-03 19:12:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:12:56,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:56,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:56,480 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) [2022-03-03 19:12:56,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-03 19:12:56,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:12:56,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-03 19:12:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:56,740 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 17 treesize of output 13 [2022-03-03 19:12:56,847 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 171 treesize of output 145 [2022-03-03 19:12:56,850 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 145 treesize of output 127 [2022-03-03 19:12:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:12:57,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:57,311 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 282 treesize of output 254 [2022-03-03 19:12:57,725 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:57,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:57,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:12:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:12:57,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340931752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:57,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:57,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2022-03-03 19:12:57,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253894481] [2022-03-03 19:12:57,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:57,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:12:57,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:57,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:12:57,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:12:57,734 INFO L87 Difference]: Start difference. First operand 334 states and 989 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:58,225 INFO L93 Difference]: Finished difference Result 785 states and 2241 transitions. [2022-03-03 19:12:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:12:58,225 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 [2022-03-03 19:12:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:58,226 INFO L225 Difference]: With dead ends: 785 [2022-03-03 19:12:58,226 INFO L226 Difference]: Without dead ends: 734 [2022-03-03 19:12:58,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:12:58,227 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:58,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 194 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-03 19:12:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 354. [2022-03-03 19:12:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.028328611898017) internal successors, (1069), 353 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1069 transitions. [2022-03-03 19:12:58,232 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1069 transitions. Word has length 22 [2022-03-03 19:12:58,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:58,232 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1069 transitions. [2022-03-03 19:12:58,232 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) [2022-03-03 19:12:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1069 transitions. [2022-03-03 19:12:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:58,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:58,232 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] [2022-03-03 19:12:58,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-03 19:12:58,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-03 19:12:58,433 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1085469925, now seen corresponding path program 196 times [2022-03-03 19:12:58,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:58,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146960391] [2022-03-03 19:12:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:12:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:58,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:12:58,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146960391] [2022-03-03 19:12:58,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146960391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:12:58,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255269373] [2022-03-03 19:12:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:12:58,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:12:58,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:12:58,541 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) [2022-03-03 19:12:58,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-03 19:12:58,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:12:58,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:12:58,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:12:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:12:58,865 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 29 treesize of output 23 [2022-03-03 19:12:58,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:12:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:59,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:12:59,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:12:59,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:59,334 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:12:59,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:12:59,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:12:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:12:59,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255269373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:12:59,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:12:59,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:12:59,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851349651] [2022-03-03 19:12:59,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:12:59,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:12:59,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:12:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:12:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:12:59,344 INFO L87 Difference]: Start difference. First operand 354 states and 1069 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:59,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:12:59,690 INFO L93 Difference]: Finished difference Result 485 states and 1410 transitions. [2022-03-03 19:12:59,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:12:59,690 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 [2022-03-03 19:12:59,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:12:59,691 INFO L225 Difference]: With dead ends: 485 [2022-03-03 19:12:59,691 INFO L226 Difference]: Without dead ends: 476 [2022-03-03 19:12:59,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:12:59,691 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:12:59,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 175 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:12:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-03 19:12:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 362. [2022-03-03 19:12:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.011080332409972) internal successors, (1087), 361 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:12:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1087 transitions. [2022-03-03 19:12:59,696 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1087 transitions. Word has length 22 [2022-03-03 19:12:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:12:59,696 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1087 transitions. [2022-03-03 19:12:59,696 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) [2022-03-03 19:12:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1087 transitions. [2022-03-03 19:12:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:12:59,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:12:59,696 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] [2022-03-03 19:12:59,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-03 19:12:59,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-03-03 19:12:59,907 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:12:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:12:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1049870599, now seen corresponding path program 197 times [2022-03-03 19:12:59,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:12:59,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004155149] [2022-03-03 19:12:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:12:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:12:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:00,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:00,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004155149] [2022-03-03 19:13:00,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004155149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:00,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107935689] [2022-03-03 19:13:00,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:13:00,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:00,021 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) [2022-03-03 19:13:00,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-03 19:13:00,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:13:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:00,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:00,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:13:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:00,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:00,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:00,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:00,748 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:00,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:13:00,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:00,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107935689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:00,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:00,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:13:00,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581608491] [2022-03-03 19:13:00,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:00,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:00,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:00,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:00,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:00,756 INFO L87 Difference]: Start difference. First operand 362 states and 1087 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:01,033 INFO L93 Difference]: Finished difference Result 449 states and 1342 transitions. [2022-03-03 19:13:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:13:01,033 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 [2022-03-03 19:13:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:01,034 INFO L225 Difference]: With dead ends: 449 [2022-03-03 19:13:01,034 INFO L226 Difference]: Without dead ends: 449 [2022-03-03 19:13:01,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:13:01,034 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:01,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 121 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:13:01,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-03 19:13:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 329. [2022-03-03 19:13:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2022-03-03 19:13:01,038 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2022-03-03 19:13:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:01,039 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2022-03-03 19:13:01,039 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) [2022-03-03 19:13:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2022-03-03 19:13:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:01,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:01,039 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] [2022-03-03 19:13:01,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:01,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:01,255 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:01,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2103683403, now seen corresponding path program 198 times [2022-03-03 19:13:01,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:01,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776699344] [2022-03-03 19:13:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:01,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:13:01,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:01,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776699344] [2022-03-03 19:13:01,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776699344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:01,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942290535] [2022-03-03 19:13:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:13:01,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:01,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:01,328 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) [2022-03-03 19:13:01,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-03 19:13:01,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:13:01,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:01,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:01,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:13:01,698 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 [2022-03-03 19:13:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:01,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:01,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:01,854 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 13 treesize of output 17 [2022-03-03 19:13:01,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:01,877 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 12 treesize of output 16 [2022-03-03 19:13:01,885 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:01,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:01,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942290535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:01,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:01,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2022-03-03 19:13:01,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718238922] [2022-03-03 19:13:01,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:01,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:13:01,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:13:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:13:01,891 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:03,008 INFO L93 Difference]: Finished difference Result 1265 states and 3638 transitions. [2022-03-03 19:13:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:13:03,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:03,010 INFO L225 Difference]: With dead ends: 1265 [2022-03-03 19:13:03,010 INFO L226 Difference]: Without dead ends: 1115 [2022-03-03 19:13:03,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:13:03,011 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 239 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:03,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 497 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:13:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-03-03 19:13:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 339. [2022-03-03 19:13:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2022-03-03 19:13:03,018 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2022-03-03 19:13:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:03,018 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2022-03-03 19:13:03,018 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) [2022-03-03 19:13:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2022-03-03 19:13:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:03,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:03,018 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] [2022-03-03 19:13:03,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:03,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-03-03 19:13:03,235 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:03,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1885422411, now seen corresponding path program 199 times [2022-03-03 19:13:03,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:03,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966775564] [2022-03-03 19:13:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:03,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:03,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:03,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966775564] [2022-03-03 19:13:03,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966775564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:03,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340541083] [2022-03-03 19:13:03,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:13:03,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:03,286 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) [2022-03-03 19:13:03,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-03 19:13:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:03,550 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 29 treesize of output 23 [2022-03-03 19:13:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:03,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:03,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:03,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:03,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:03,785 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 12 treesize of output 16 [2022-03-03 19:13:03,792 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:03,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:03,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340541083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:03,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:03,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-03-03 19:13:03,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516459281] [2022-03-03 19:13:03,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:03,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:03,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:03,796 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:04,700 INFO L93 Difference]: Finished difference Result 1036 states and 3022 transitions. [2022-03-03 19:13:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:13:04,700 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 [2022-03-03 19:13:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:04,701 INFO L225 Difference]: With dead ends: 1036 [2022-03-03 19:13:04,701 INFO L226 Difference]: Without dead ends: 934 [2022-03-03 19:13:04,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=602, Invalid=2478, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:13:04,702 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 188 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:04,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 596 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:13:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-03-03 19:13:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 304. [2022-03-03 19:13:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-03 19:13:04,707 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-03 19:13:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:04,707 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-03 19:13:04,707 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) [2022-03-03 19:13:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-03 19:13:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:04,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:04,708 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] [2022-03-03 19:13:04,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:04,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-03 19:13:04,924 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2078687993, now seen corresponding path program 200 times [2022-03-03 19:13:04,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:04,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802339360] [2022-03-03 19:13:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:04,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:04,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802339360] [2022-03-03 19:13:04,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802339360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:04,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524844948] [2022-03-03 19:13:04,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:04,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:04,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:04,997 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) [2022-03-03 19:13:04,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-03 19:13:05,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:05,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:05,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:05,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:05,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:05,300 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 43 treesize of output 33 [2022-03-03 19:13:05,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:05,348 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:05,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:05,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-03 19:13:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:05,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:05,443 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:05,443 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 47 treesize of output 45 [2022-03-03 19:13:05,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:05,533 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:05,539 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:05,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:05,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524844948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:05,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:05,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:13:05,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664655284] [2022-03-03 19:13:05,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:05,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:05,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:05,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:05,546 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:05,676 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2022-03-03 19:13:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:13:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:05,677 INFO L225 Difference]: With dead ends: 455 [2022-03-03 19:13:05,677 INFO L226 Difference]: Without dead ends: 455 [2022-03-03 19:13:05,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:13:05,678 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 89 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:05,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 144 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 286 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-03-03 19:13:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-03-03 19:13:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 318. [2022-03-03 19:13:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.965299684542587) internal successors, (940), 317 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 940 transitions. [2022-03-03 19:13:05,681 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 940 transitions. Word has length 22 [2022-03-03 19:13:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:05,681 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 940 transitions. [2022-03-03 19:13:05,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 940 transitions. [2022-03-03 19:13:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:05,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:05,682 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] [2022-03-03 19:13:05,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:05,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:05,895 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:05,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1709203663, now seen corresponding path program 201 times [2022-03-03 19:13:05,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:05,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036771906] [2022-03-03 19:13:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:05,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:06,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:06,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036771906] [2022-03-03 19:13:06,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036771906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:06,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523686461] [2022-03-03 19:13:06,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:13:06,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:06,013 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) [2022-03-03 19:13:06,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-03 19:13:06,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:13:06,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:06,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:06,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:06,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:06,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:06,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:06,442 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 31 treesize of output 23 [2022-03-03 19:13:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:06,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:06,554 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:06,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:13:06,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:06,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:06,684 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:06,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:06,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523686461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:06,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:06,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:13:06,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289469573] [2022-03-03 19:13:06,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:06,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:13:06,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:13:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:13:06,693 INFO L87 Difference]: Start difference. First operand 318 states and 940 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:07,094 INFO L93 Difference]: Finished difference Result 485 states and 1414 transitions. [2022-03-03 19:13:07,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:13:07,094 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 [2022-03-03 19:13:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:07,095 INFO L225 Difference]: With dead ends: 485 [2022-03-03 19:13:07,095 INFO L226 Difference]: Without dead ends: 476 [2022-03-03 19:13:07,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:13:07,095 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:07,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 172 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 429 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2022-03-03 19:13:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-03 19:13:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 336. [2022-03-03 19:13:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.976119402985075) internal successors, (997), 335 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 997 transitions. [2022-03-03 19:13:07,099 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 997 transitions. Word has length 22 [2022-03-03 19:13:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:07,099 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 997 transitions. [2022-03-03 19:13:07,099 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) [2022-03-03 19:13:07,099 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 997 transitions. [2022-03-03 19:13:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:07,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:07,100 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] [2022-03-03 19:13:07,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:07,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:07,310 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -696511131, now seen corresponding path program 202 times [2022-03-03 19:13:07,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:07,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960906015] [2022-03-03 19:13:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:07,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:07,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960906015] [2022-03-03 19:13:07,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960906015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:07,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712675624] [2022-03-03 19:13:07,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:13:07,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:07,367 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) [2022-03-03 19:13:07,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-03 19:13:07,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:13:07,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:07,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:07,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-03-03 19:13:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:07,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:07,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:07,777 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 47 treesize of output 45 [2022-03-03 19:13:07,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:07,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:07,881 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:07,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:07,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712675624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:07,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:07,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:13:07,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412128592] [2022-03-03 19:13:07,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:07,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:07,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:07,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:07,889 INFO L87 Difference]: Start difference. First operand 336 states and 997 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:08,320 INFO L93 Difference]: Finished difference Result 568 states and 1645 transitions. [2022-03-03 19:13:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:13:08,320 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 [2022-03-03 19:13:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:08,321 INFO L225 Difference]: With dead ends: 568 [2022-03-03 19:13:08,321 INFO L226 Difference]: Without dead ends: 428 [2022-03-03 19:13:08,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:13:08,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 141 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:08,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 220 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:13:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-03-03 19:13:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 348. [2022-03-03 19:13:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.962536023054755) internal successors, (1028), 347 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1028 transitions. [2022-03-03 19:13:08,326 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1028 transitions. Word has length 22 [2022-03-03 19:13:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:08,326 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 1028 transitions. [2022-03-03 19:13:08,326 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) [2022-03-03 19:13:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1028 transitions. [2022-03-03 19:13:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:08,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:08,326 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] [2022-03-03 19:13:08,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:08,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-03-03 19:13:08,543 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:08,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1038452195, now seen corresponding path program 203 times [2022-03-03 19:13:08,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:08,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911033426] [2022-03-03 19:13:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:08,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:08,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911033426] [2022-03-03 19:13:08,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911033426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:08,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786012872] [2022-03-03 19:13:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:13:08,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:08,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:08,601 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) [2022-03-03 19:13:08,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-03 19:13:08,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:08,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:08,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:08,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:09,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:09,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-03 19:13:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:09,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:09,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:09,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:09,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:09,226 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 12 treesize of output 16 [2022-03-03 19:13:09,232 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:09,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:09,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786012872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:09,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:09,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:13:09,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180937412] [2022-03-03 19:13:09,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:09,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:09,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:09,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:09,240 INFO L87 Difference]: Start difference. First operand 348 states and 1028 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:09,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:09,717 INFO L93 Difference]: Finished difference Result 798 states and 2298 transitions. [2022-03-03 19:13:09,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:13:09,717 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 [2022-03-03 19:13:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:09,718 INFO L225 Difference]: With dead ends: 798 [2022-03-03 19:13:09,718 INFO L226 Difference]: Without dead ends: 731 [2022-03-03 19:13:09,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:13:09,718 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 199 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:09,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 312 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1203 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-03-03 19:13:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-03 19:13:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 376. [2022-03-03 19:13:09,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 3.04) internal successors, (1140), 375 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1140 transitions. [2022-03-03 19:13:09,724 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1140 transitions. Word has length 22 [2022-03-03 19:13:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:09,724 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1140 transitions. [2022-03-03 19:13:09,724 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) [2022-03-03 19:13:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1140 transitions. [2022-03-03 19:13:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:09,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:09,724 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] [2022-03-03 19:13:09,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:09,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-03 19:13:09,940 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash -668967865, now seen corresponding path program 204 times [2022-03-03 19:13:09,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:09,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448345404] [2022-03-03 19:13:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:09,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:09,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:09,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448345404] [2022-03-03 19:13:09,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448345404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:09,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238986502] [2022-03-03 19:13:09,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:13:09,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:09,997 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) [2022-03-03 19:13:09,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-03 19:13:10,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:13:10,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:10,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:10,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:10,418 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 20 treesize of output 14 [2022-03-03 19:13:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:10,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:10,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:10,591 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 18 treesize of output 22 [2022-03-03 19:13:10,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:10,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:10,681 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:10,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:10,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238986502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:10,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:10,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-03 19:13:10,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464205636] [2022-03-03 19:13:10,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:10,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:10,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:10,694 INFO L87 Difference]: Start difference. First operand 376 states and 1140 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:11,140 INFO L93 Difference]: Finished difference Result 681 states and 1981 transitions. [2022-03-03 19:13:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:13:11,141 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 [2022-03-03 19:13:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:11,142 INFO L225 Difference]: With dead ends: 681 [2022-03-03 19:13:11,142 INFO L226 Difference]: Without dead ends: 585 [2022-03-03 19:13:11,142 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 [2022-03-03 19:13:11,142 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 106 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:11,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 236 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 973 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-03-03 19:13:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-03 19:13:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 388. [2022-03-03 19:13:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.020671834625323) internal successors, (1169), 387 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1169 transitions. [2022-03-03 19:13:11,147 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1169 transitions. Word has length 22 [2022-03-03 19:13:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:11,147 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1169 transitions. [2022-03-03 19:13:11,147 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) [2022-03-03 19:13:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1169 transitions. [2022-03-03 19:13:11,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:11,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:11,148 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] [2022-03-03 19:13:11,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-03 19:13:11,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:11,349 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash -450706873, now seen corresponding path program 205 times [2022-03-03 19:13:11,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:11,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515069548] [2022-03-03 19:13:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:11,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:11,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:11,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515069548] [2022-03-03 19:13:11,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515069548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:11,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24967986] [2022-03-03 19:13:11,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:13:11,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:11,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:11,447 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) [2022-03-03 19:13:11,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-03 19:13:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:11,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:11,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:11,760 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:11,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:11,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:11,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:11,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:11,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:11,983 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:11,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:11,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24967986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:11,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:11,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:13:11,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709291345] [2022-03-03 19:13:11,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:11,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:13:11,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:13:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:13:11,990 INFO L87 Difference]: Start difference. First operand 388 states and 1169 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:12,140 INFO L93 Difference]: Finished difference Result 472 states and 1418 transitions. [2022-03-03 19:13:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:13:12,140 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 [2022-03-03 19:13:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:12,141 INFO L225 Difference]: With dead ends: 472 [2022-03-03 19:13:12,141 INFO L226 Difference]: Without dead ends: 472 [2022-03-03 19:13:12,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:13:12,141 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:12,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 129 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 440 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-03-03 19:13:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-03-03 19:13:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 389. [2022-03-03 19:13:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.0231958762886597) internal successors, (1173), 388 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1173 transitions. [2022-03-03 19:13:12,145 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1173 transitions. Word has length 22 [2022-03-03 19:13:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:12,145 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 1173 transitions. [2022-03-03 19:13:12,145 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) [2022-03-03 19:13:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1173 transitions. [2022-03-03 19:13:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:12,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:12,146 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] [2022-03-03 19:13:12,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:12,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-03 19:13:12,355 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash 307691045, now seen corresponding path program 206 times [2022-03-03 19:13:12,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:12,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387056650] [2022-03-03 19:13:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:12,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:12,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:12,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387056650] [2022-03-03 19:13:12,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387056650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:12,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239507031] [2022-03-03 19:13:12,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:12,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:12,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:12,455 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) [2022-03-03 19:13:12,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-03 19:13:12,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:12,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:12,827 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-03 19:13:12,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:12,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:12,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:12,895 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 31 treesize of output 23 [2022-03-03 19:13:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:13,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:13,039 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 47 treesize of output 45 [2022-03-03 19:13:13,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:13,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:13,163 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:13,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:13,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239507031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:13,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:13,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:13:13,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895252685] [2022-03-03 19:13:13,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:13,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:13,171 INFO L87 Difference]: Start difference. First operand 389 states and 1173 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:13,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:13,580 INFO L93 Difference]: Finished difference Result 700 states and 2043 transitions. [2022-03-03 19:13:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:13:13,580 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 [2022-03-03 19:13:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:13,581 INFO L225 Difference]: With dead ends: 700 [2022-03-03 19:13:13,581 INFO L226 Difference]: Without dead ends: 633 [2022-03-03 19:13:13,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:13:13,582 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:13,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 213 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 577 Invalid, 0 Unknown, 313 Unchecked, 0.2s Time] [2022-03-03 19:13:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-03-03 19:13:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 396. [2022-03-03 19:13:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.017721518987342) internal successors, (1192), 395 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1192 transitions. [2022-03-03 19:13:13,587 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1192 transitions. Word has length 22 [2022-03-03 19:13:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:13,587 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1192 transitions. [2022-03-03 19:13:13,587 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) [2022-03-03 19:13:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1192 transitions. [2022-03-03 19:13:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:13,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:13,588 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] [2022-03-03 19:13:13,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:13,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-03 19:13:13,802 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1425035881, now seen corresponding path program 207 times [2022-03-03 19:13:13,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:13,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923513645] [2022-03-03 19:13:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:13,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:13,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:13,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923513645] [2022-03-03 19:13:13,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923513645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:13,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202222034] [2022-03-03 19:13:13,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:13:13,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:13,865 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) [2022-03-03 19:13:13,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-03 19:13:14,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:13:14,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:14,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:14,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:14,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:14,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:14,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:14,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:14,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:14,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:13:14,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:14,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:14,554 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:14,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:14,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202222034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:14,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:14,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:13:14,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225602539] [2022-03-03 19:13:14,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:14,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:14,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:14,561 INFO L87 Difference]: Start difference. First operand 396 states and 1192 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:14,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:14,812 INFO L93 Difference]: Finished difference Result 643 states and 1846 transitions. [2022-03-03 19:13:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:13:14,812 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 [2022-03-03 19:13:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:14,813 INFO L225 Difference]: With dead ends: 643 [2022-03-03 19:13:14,813 INFO L226 Difference]: Without dead ends: 610 [2022-03-03 19:13:14,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:13:14,813 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:14,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 216 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 812 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-03-03 19:13:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-03-03 19:13:14,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 387. [2022-03-03 19:13:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.010362694300518) internal successors, (1162), 386 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1162 transitions. [2022-03-03 19:13:14,823 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1162 transitions. Word has length 22 [2022-03-03 19:13:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:14,823 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1162 transitions. [2022-03-03 19:13:14,823 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) [2022-03-03 19:13:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1162 transitions. [2022-03-03 19:13:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:14,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:14,824 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] [2022-03-03 19:13:14,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-03 19:13:15,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-03 19:13:15,039 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1601709517, now seen corresponding path program 208 times [2022-03-03 19:13:15,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:15,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131506688] [2022-03-03 19:13:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:15,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:15,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:15,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131506688] [2022-03-03 19:13:15,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131506688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:15,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506577079] [2022-03-03 19:13:15,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:13:15,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:15,154 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) [2022-03-03 19:13:15,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-03 19:13:15,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:13:15,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:15,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:15,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:15,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:15,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:15,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:15,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:15,723 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 47 treesize of output 45 [2022-03-03 19:13:15,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:15,878 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:15,888 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:15,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:15,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506577079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:15,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:15,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:13:15,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101036136] [2022-03-03 19:13:15,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:15,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:15,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:15,900 INFO L87 Difference]: Start difference. First operand 387 states and 1162 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:16,381 INFO L93 Difference]: Finished difference Result 611 states and 1772 transitions. [2022-03-03 19:13:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:13:16,381 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 [2022-03-03 19:13:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:16,382 INFO L225 Difference]: With dead ends: 611 [2022-03-03 19:13:16,382 INFO L226 Difference]: Without dead ends: 611 [2022-03-03 19:13:16,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:13:16,383 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:16,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 178 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:13:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-03 19:13:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 371. [2022-03-03 19:13:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0108108108108107) internal successors, (1114), 370 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:16,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1114 transitions. [2022-03-03 19:13:16,387 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1114 transitions. Word has length 22 [2022-03-03 19:13:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:16,387 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1114 transitions. [2022-03-03 19:13:16,388 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) [2022-03-03 19:13:16,388 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1114 transitions. [2022-03-03 19:13:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:16,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:16,388 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] [2022-03-03 19:13:16,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:16,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:16,588 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 2012970719, now seen corresponding path program 209 times [2022-03-03 19:13:16,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:16,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444749153] [2022-03-03 19:13:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:16,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:16,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444749153] [2022-03-03 19:13:16,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444749153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:16,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329352319] [2022-03-03 19:13:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:13:16,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:16,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:16,858 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) [2022-03-03 19:13:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-03 19:13:17,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:17,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:17,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:17,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:17,269 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 50 treesize of output 40 [2022-03-03 19:13:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:17,395 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-03 19:13:17,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:17,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:13:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:17,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:17,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:17,604 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 47 treesize of output 45 [2022-03-03 19:13:17,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:17,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:17,716 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:17,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:17,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329352319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:17,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:17,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-03 19:13:17,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499568102] [2022-03-03 19:13:17,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:13:17,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:13:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:13:17,724 INFO L87 Difference]: Start difference. First operand 371 states and 1114 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:19,525 INFO L93 Difference]: Finished difference Result 1013 states and 2850 transitions. [2022-03-03 19:13:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:13:19,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:19,527 INFO L225 Difference]: With dead ends: 1013 [2022-03-03 19:13:19,527 INFO L226 Difference]: Without dead ends: 995 [2022-03-03 19:13:19,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=556, Invalid=2636, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:13:19,528 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 220 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:19,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 494 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1197 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-03-03 19:13:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-03 19:13:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 374. [2022-03-03 19:13:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.013404825737265) internal successors, (1124), 373 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1124 transitions. [2022-03-03 19:13:19,549 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1124 transitions. Word has length 22 [2022-03-03 19:13:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:19,549 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1124 transitions. [2022-03-03 19:13:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1124 transitions. [2022-03-03 19:13:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:19,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:19,549 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] [2022-03-03 19:13:19,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:19,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-03 19:13:19,771 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1939747083, now seen corresponding path program 210 times [2022-03-03 19:13:19,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:19,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324691730] [2022-03-03 19:13:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:19,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:19,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324691730] [2022-03-03 19:13:19,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324691730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:19,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294865677] [2022-03-03 19:13:19,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:13:19,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:19,936 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) [2022-03-03 19:13:19,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-03 19:13:20,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:13:20,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:20,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:20,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:20,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:20,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:13:20,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:20,493 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-03 19:13:20,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:20,496 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 40 treesize of output 32 [2022-03-03 19:13:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:20,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:20,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:20,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:20,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:20,825 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 12 treesize of output 16 [2022-03-03 19:13:20,833 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:20,833 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 7 treesize of output 3 [2022-03-03 19:13:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:20,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294865677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:20,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:20,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-03 19:13:20,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150309988] [2022-03-03 19:13:20,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:20,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:20,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:20,841 INFO L87 Difference]: Start difference. First operand 374 states and 1124 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:21,199 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2022-03-03 19:13:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:13:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:21,200 INFO L225 Difference]: With dead ends: 517 [2022-03-03 19:13:21,200 INFO L226 Difference]: Without dead ends: 507 [2022-03-03 19:13:21,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:13:21,201 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:21,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 204 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 590 Invalid, 0 Unknown, 214 Unchecked, 0.2s Time] [2022-03-03 19:13:21,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-03 19:13:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 390. [2022-03-03 19:13:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9974293059125965) internal successors, (1166), 389 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1166 transitions. [2022-03-03 19:13:21,207 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1166 transitions. Word has length 22 [2022-03-03 19:13:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:21,207 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1166 transitions. [2022-03-03 19:13:21,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1166 transitions. [2022-03-03 19:13:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:21,208 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:21,208 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] [2022-03-03 19:13:21,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:21,431 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash 774448297, now seen corresponding path program 211 times [2022-03-03 19:13:21,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:21,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974175745] [2022-03-03 19:13:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:21,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:21,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974175745] [2022-03-03 19:13:21,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974175745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:21,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739148274] [2022-03-03 19:13:21,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:13:21,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:21,516 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) [2022-03-03 19:13:21,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-03 19:13:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:21,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:21,902 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 50 treesize of output 40 [2022-03-03 19:13:22,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:22,015 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 44 treesize of output 36 [2022-03-03 19:13:22,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:22,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:13:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:22,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:22,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:22,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:13:22,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:22,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:22,227 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:22,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:22,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739148274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:22,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:22,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-03 19:13:22,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851048386] [2022-03-03 19:13:22,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:22,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:22,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:22,234 INFO L87 Difference]: Start difference. First operand 390 states and 1166 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:23,011 INFO L93 Difference]: Finished difference Result 810 states and 2278 transitions. [2022-03-03 19:13:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:13:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:23,013 INFO L225 Difference]: With dead ends: 810 [2022-03-03 19:13:23,013 INFO L226 Difference]: Without dead ends: 736 [2022-03-03 19:13:23,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:13:23,013 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:23,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 371 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 902 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2022-03-03 19:13:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-03-03 19:13:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 400. [2022-03-03 19:13:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.025062656641604) internal successors, (1207), 399 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1207 transitions. [2022-03-03 19:13:23,019 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1207 transitions. Word has length 22 [2022-03-03 19:13:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:23,019 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 1207 transitions. [2022-03-03 19:13:23,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1207 transitions. [2022-03-03 19:13:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:23,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:23,019 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] [2022-03-03 19:13:23,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:23,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:23,236 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:23,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash 952192629, now seen corresponding path program 212 times [2022-03-03 19:13:23,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:23,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953112299] [2022-03-03 19:13:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:23,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:23,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:23,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953112299] [2022-03-03 19:13:23,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953112299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:23,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986051603] [2022-03-03 19:13:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:23,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:23,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:23,379 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) [2022-03-03 19:13:23,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-03 19:13:23,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:23,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:23,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:23,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:23,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:23,723 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:13:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:23,896 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2022-03-03 19:13:23,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:23,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-03 19:13:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:23,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:24,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:24,019 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 47 treesize of output 45 [2022-03-03 19:13:24,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:24,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:24,140 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:24,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:24,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986051603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:24,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:24,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-03 19:13:24,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313093930] [2022-03-03 19:13:24,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:24,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:24,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:24,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:24,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:24,147 INFO L87 Difference]: Start difference. First operand 400 states and 1207 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:24,481 INFO L93 Difference]: Finished difference Result 479 states and 1428 transitions. [2022-03-03 19:13:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:13:24,481 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 [2022-03-03 19:13:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:24,482 INFO L225 Difference]: With dead ends: 479 [2022-03-03 19:13:24,482 INFO L226 Difference]: Without dead ends: 470 [2022-03-03 19:13:24,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:13:24,482 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:24,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 173 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 261 Unchecked, 0.1s Time] [2022-03-03 19:13:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-03 19:13:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 399. [2022-03-03 19:13:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0251256281407035) internal successors, (1204), 398 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1204 transitions. [2022-03-03 19:13:24,487 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1204 transitions. Word has length 22 [2022-03-03 19:13:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:24,487 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1204 transitions. [2022-03-03 19:13:24,487 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) [2022-03-03 19:13:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1204 transitions. [2022-03-03 19:13:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:24,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:24,488 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] [2022-03-03 19:13:24,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-03 19:13:24,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2022-03-03 19:13:24,692 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1968961355, now seen corresponding path program 213 times [2022-03-03 19:13:24,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:24,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065163025] [2022-03-03 19:13:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:24,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:24,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:24,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065163025] [2022-03-03 19:13:24,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065163025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:24,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636861503] [2022-03-03 19:13:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:13:24,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:24,763 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) [2022-03-03 19:13:24,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-03 19:13:24,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:13:24,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:24,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:24,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:25,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:25,096 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-03 19:13:25,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:25,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 43 [2022-03-03 19:13:25,299 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 47 treesize of output 37 [2022-03-03 19:13:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:25,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:25,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:25,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2022-03-03 19:13:25,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:25,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:25,692 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:25,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 3 [2022-03-03 19:13:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:25,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636861503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:25,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:25,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-03 19:13:25,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710404497] [2022-03-03 19:13:25,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:25,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:13:25,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:25,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:13:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:13:25,706 INFO L87 Difference]: Start difference. First operand 399 states and 1204 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:26,085 INFO L93 Difference]: Finished difference Result 704 states and 2032 transitions. [2022-03-03 19:13:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:13:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:26,087 INFO L225 Difference]: With dead ends: 704 [2022-03-03 19:13:26,087 INFO L226 Difference]: Without dead ends: 565 [2022-03-03 19:13:26,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:13:26,087 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 155 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:26,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 199 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 761 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-03-03 19:13:26,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-03 19:13:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 370. [2022-03-03 19:13:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.978319783197832) internal successors, (1099), 369 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:26,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1099 transitions. [2022-03-03 19:13:26,094 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1099 transitions. Word has length 22 [2022-03-03 19:13:26,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:26,094 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1099 transitions. [2022-03-03 19:13:26,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:26,094 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1099 transitions. [2022-03-03 19:13:26,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:26,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:26,095 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] [2022-03-03 19:13:26,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-03-03 19:13:26,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:26,299 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:26,300 INFO L85 PathProgramCache]: Analyzing trace with hash -391539511, now seen corresponding path program 214 times [2022-03-03 19:13:26,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:26,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504842011] [2022-03-03 19:13:26,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:26,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:26,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:26,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504842011] [2022-03-03 19:13:26,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504842011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:26,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172717775] [2022-03-03 19:13:26,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:13:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:26,388 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) [2022-03-03 19:13:26,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-03 19:13:26,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:13:26,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:26,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:26,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:26,786 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2022-03-03 19:13:26,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:26,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:26,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:26,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-03-03 19:13:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:26,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:26,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:26,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-03 19:13:27,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:27,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-03-03 19:13:27,111 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:27,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:27,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172717775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:27,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:27,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2022-03-03 19:13:27,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989492520] [2022-03-03 19:13:27,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:27,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:13:27,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:13:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:13:27,120 INFO L87 Difference]: Start difference. First operand 370 states and 1099 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:27,552 INFO L93 Difference]: Finished difference Result 748 states and 2195 transitions. [2022-03-03 19:13:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:13:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:13:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:27,554 INFO L225 Difference]: With dead ends: 748 [2022-03-03 19:13:27,554 INFO L226 Difference]: Without dead ends: 619 [2022-03-03 19:13:27,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:13:27,567 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:27,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 269 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 617 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-03-03 19:13:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-03-03 19:13:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 372. [2022-03-03 19:13:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9784366576819408) internal successors, (1105), 371 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1105 transitions. [2022-03-03 19:13:27,587 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1105 transitions. Word has length 22 [2022-03-03 19:13:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:27,587 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1105 transitions. [2022-03-03 19:13:27,587 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) [2022-03-03 19:13:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1105 transitions. [2022-03-03 19:13:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:13:27,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:27,588 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] [2022-03-03 19:13:27,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-03 19:13:27,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:27,789 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash -946201253, now seen corresponding path program 215 times [2022-03-03 19:13:27,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:27,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450309226] [2022-03-03 19:13:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:27,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:27,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450309226] [2022-03-03 19:13:27,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450309226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:27,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391161901] [2022-03-03 19:13:27,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:13:27,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:27,866 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) [2022-03-03 19:13:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-03 19:13:28,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:28,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-03 19:13:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:28,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:28,231 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 31 treesize of output 23 [2022-03-03 19:13:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:28,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:13:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:28,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:28,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:28,314 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 42 treesize of output 40 [2022-03-03 19:13:28,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:13:28,399 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 12 treesize of output 16 [2022-03-03 19:13:28,405 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-03 19:13:28,405 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 7 treesize of output 3 [2022-03-03 19:13:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:28,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391161901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:28,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:28,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-03 19:13:28,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333999860] [2022-03-03 19:13:28,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:28,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:28,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:28,411 INFO L87 Difference]: Start difference. First operand 372 states and 1105 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:28,882 INFO L93 Difference]: Finished difference Result 599 states and 1743 transitions. [2022-03-03 19:13:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:13:28,883 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 [2022-03-03 19:13:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:28,883 INFO L225 Difference]: With dead ends: 599 [2022-03-03 19:13:28,883 INFO L226 Difference]: Without dead ends: 478 [2022-03-03 19:13:28,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:13:28,884 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:28,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 292 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:13:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-03 19:13:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 304. [2022-03-03 19:13:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2022-03-03 19:13:28,888 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2022-03-03 19:13:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:28,888 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2022-03-03 19:13:28,888 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) [2022-03-03 19:13:28,888 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2022-03-03 19:13:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:28,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:28,888 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] [2022-03-03 19:13:28,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-03 19:13:29,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-03-03 19:13:29,105 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2020815505, now seen corresponding path program 216 times [2022-03-03 19:13:29,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:29,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114431436] [2022-03-03 19:13:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:29,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:29,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:29,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114431436] [2022-03-03 19:13:29,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114431436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:29,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259849055] [2022-03-03 19:13:29,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:13:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:29,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:29,252 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) [2022-03-03 19:13:29,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-03 19:13:29,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:13:29,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:29,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:29,541 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 136 treesize of output 120 [2022-03-03 19:13:29,800 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 145 treesize of output 125 [2022-03-03 19:13:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:29,804 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 137 treesize of output 119 [2022-03-03 19:13:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:13:30,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:30,185 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 188 treesize of output 164 [2022-03-03 19:13:30,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-03 19:13:30,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:30,498 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 172 treesize of output 153 [2022-03-03 19:13:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:13:30,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259849055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:30,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:30,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-03 19:13:30,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988507765] [2022-03-03 19:13:30,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:30,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:13:30,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:30,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:13:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:13:30,574 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:31,443 INFO L93 Difference]: Finished difference Result 592 states and 1853 transitions. [2022-03-03 19:13:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:13:31,443 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 [2022-03-03 19:13:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:31,444 INFO L225 Difference]: With dead ends: 592 [2022-03-03 19:13:31,444 INFO L226 Difference]: Without dead ends: 553 [2022-03-03 19:13:31,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=310, Invalid=1852, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:13:31,445 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:31,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 329 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 780 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-03-03 19:13:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-03-03 19:13:31,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 335. [2022-03-03 19:13:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 3.05688622754491) internal successors, (1021), 334 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1021 transitions. [2022-03-03 19:13:31,449 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1021 transitions. Word has length 23 [2022-03-03 19:13:31,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:31,449 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 1021 transitions. [2022-03-03 19:13:31,449 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) [2022-03-03 19:13:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1021 transitions. [2022-03-03 19:13:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:31,450 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:31,450 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] [2022-03-03 19:13:31,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:31,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-03 19:13:31,667 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -239067473, now seen corresponding path program 217 times [2022-03-03 19:13:31,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:31,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004007000] [2022-03-03 19:13:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:31,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:31,771 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:31,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004007000] [2022-03-03 19:13:31,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004007000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:31,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301568138] [2022-03-03 19:13:31,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:13:31,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:31,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:31,772 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) [2022-03-03 19:13:31,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-03 19:13:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:32,080 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 153 treesize of output 137 [2022-03-03 19:13:32,523 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 [2022-03-03 19:13:32,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:32,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 153 [2022-03-03 19:13:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:32,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:33,040 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 171 treesize of output 151 [2022-03-03 19:13:33,362 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 275 treesize of output 247 [2022-03-03 19:13:33,370 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:33,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-03-03 19:13:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:33,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301568138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:33,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:33,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:13:33,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053638977] [2022-03-03 19:13:33,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:33,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:13:33,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:13:33,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:13:33,492 INFO L87 Difference]: Start difference. First operand 335 states and 1021 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:34,326 INFO L93 Difference]: Finished difference Result 675 states and 2100 transitions. [2022-03-03 19:13:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:13:34,326 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 [2022-03-03 19:13:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:34,327 INFO L225 Difference]: With dead ends: 675 [2022-03-03 19:13:34,327 INFO L226 Difference]: Without dead ends: 628 [2022-03-03 19:13:34,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:13:34,328 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 313 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:34,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 246 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 685 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-03-03 19:13:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-03-03 19:13:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 370. [2022-03-03 19:13:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.151761517615176) internal successors, (1163), 369 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1163 transitions. [2022-03-03 19:13:34,333 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1163 transitions. Word has length 23 [2022-03-03 19:13:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:34,333 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1163 transitions. [2022-03-03 19:13:34,333 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) [2022-03-03 19:13:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1163 transitions. [2022-03-03 19:13:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:34,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:34,333 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] [2022-03-03 19:13:34,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-03 19:13:34,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-03 19:13:34,550 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:34,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1703477295, now seen corresponding path program 218 times [2022-03-03 19:13:34,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:34,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603362638] [2022-03-03 19:13:34,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:34,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:34,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:34,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603362638] [2022-03-03 19:13:34,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603362638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:34,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869855988] [2022-03-03 19:13:34,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:34,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:34,670 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) [2022-03-03 19:13:34,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-03 19:13:34,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:34,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:35,024 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 209 treesize of output 193 [2022-03-03 19:13:35,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-03 19:13:35,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:35,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-03 19:13:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:35,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:35,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:13:36,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-03 19:13:36,229 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:36,229 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 172 treesize of output 153 [2022-03-03 19:13:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:36,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869855988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:36,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:36,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:13:36,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325337512] [2022-03-03 19:13:36,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:36,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:36,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:36,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:36,370 INFO L87 Difference]: Start difference. First operand 370 states and 1163 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:37,977 INFO L93 Difference]: Finished difference Result 913 states and 2825 transitions. [2022-03-03 19:13:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:13:37,978 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:13:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:37,979 INFO L225 Difference]: With dead ends: 913 [2022-03-03 19:13:37,979 INFO L226 Difference]: Without dead ends: 785 [2022-03-03 19:13:37,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:13:37,980 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 190 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 937 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:37,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 626 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1547 Invalid, 0 Unknown, 937 Unchecked, 0.5s Time] [2022-03-03 19:13:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-03 19:13:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 417. [2022-03-03 19:13:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 3.2764423076923075) internal successors, (1363), 416 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1363 transitions. [2022-03-03 19:13:37,986 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1363 transitions. Word has length 23 [2022-03-03 19:13:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:37,986 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1363 transitions. [2022-03-03 19:13:37,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1363 transitions. [2022-03-03 19:13:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:37,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:37,987 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] [2022-03-03 19:13:38,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:38,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:38,200 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash -574340681, now seen corresponding path program 219 times [2022-03-03 19:13:38,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:38,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380308205] [2022-03-03 19:13:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:13:38,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:38,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380308205] [2022-03-03 19:13:38,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380308205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:38,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401852723] [2022-03-03 19:13:38,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:13:38,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:38,317 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) [2022-03-03 19:13:38,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-03 19:13:38,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:13:38,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:38,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:38,679 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 209 treesize of output 193 [2022-03-03 19:13:39,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:39,094 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-03 19:13:39,098 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 203 treesize of output 165 [2022-03-03 19:13:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:39,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:39,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:13:39,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:13:39,952 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:39,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 172 treesize of output 153 [2022-03-03 19:13:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:40,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401852723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:40,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:40,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:13:40,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818497184] [2022-03-03 19:13:40,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:40,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:13:40,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:13:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:13:40,049 INFO L87 Difference]: Start difference. First operand 417 states and 1363 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:42,229 INFO L93 Difference]: Finished difference Result 873 states and 2755 transitions. [2022-03-03 19:13:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:13:42,229 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 [2022-03-03 19:13:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:42,231 INFO L225 Difference]: With dead ends: 873 [2022-03-03 19:13:42,231 INFO L226 Difference]: Without dead ends: 775 [2022-03-03 19:13:42,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=591, Invalid=5109, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:13:42,232 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 168 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 682 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:42,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 587 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1477 Invalid, 0 Unknown, 682 Unchecked, 0.5s Time] [2022-03-03 19:13:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-03 19:13:42,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 415. [2022-03-03 19:13:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.285024154589372) internal successors, (1360), 414 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1360 transitions. [2022-03-03 19:13:42,238 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1360 transitions. Word has length 23 [2022-03-03 19:13:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:42,238 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1360 transitions. [2022-03-03 19:13:42,238 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) [2022-03-03 19:13:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1360 transitions. [2022-03-03 19:13:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:42,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:42,239 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] [2022-03-03 19:13:42,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:42,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-03 19:13:42,457 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 722270827, now seen corresponding path program 220 times [2022-03-03 19:13:42,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:42,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53710177] [2022-03-03 19:13:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:42,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:42,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53710177] [2022-03-03 19:13:42,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53710177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:42,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025324775] [2022-03-03 19:13:42,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:13:42,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:42,575 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) [2022-03-03 19:13:42,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-03 19:13:42,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:13:42,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:42,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 152 [2022-03-03 19:13:43,290 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 165 treesize of output 141 [2022-03-03 19:13:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:43,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-03 19:13:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:43,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:43,712 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 159 treesize of output 139 [2022-03-03 19:13:44,207 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:44,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 286 [2022-03-03 19:13:44,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 232 [2022-03-03 19:13:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:44,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025324775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:44,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:44,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:13:44,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978948548] [2022-03-03 19:13:44,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:44,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:13:44,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:13:44,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:13:44,367 INFO L87 Difference]: Start difference. First operand 415 states and 1360 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:45,874 INFO L93 Difference]: Finished difference Result 912 states and 2965 transitions. [2022-03-03 19:13:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:13:45,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:13:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:45,876 INFO L225 Difference]: With dead ends: 912 [2022-03-03 19:13:45,876 INFO L226 Difference]: Without dead ends: 835 [2022-03-03 19:13:45,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=458, Invalid=3574, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 19:13:45,877 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 175 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:45,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 671 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1133 Invalid, 0 Unknown, 561 Unchecked, 0.4s Time] [2022-03-03 19:13:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-03 19:13:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 432. [2022-03-03 19:13:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.3387470997679816) internal successors, (1439), 431 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1439 transitions. [2022-03-03 19:13:45,883 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1439 transitions. Word has length 23 [2022-03-03 19:13:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:45,883 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1439 transitions. [2022-03-03 19:13:45,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1439 transitions. [2022-03-03 19:13:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:45,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:45,884 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] [2022-03-03 19:13:45,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-03 19:13:46,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:46,099 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:46,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1011545183, now seen corresponding path program 221 times [2022-03-03 19:13:46,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:46,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787446552] [2022-03-03 19:13:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:46,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:46,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:46,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787446552] [2022-03-03 19:13:46,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787446552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:46,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494472803] [2022-03-03 19:13:46,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:13:46,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:46,184 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) [2022-03-03 19:13:46,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-03 19:13:46,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:13:46,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:13:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:46,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 224 treesize of output 194 [2022-03-03 19:13:46,920 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 165 treesize of output 141 [2022-03-03 19:13:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:46,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 148 [2022-03-03 19:13:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:47,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:47,660 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 314 treesize of output 276 [2022-03-03 19:13:48,052 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 275 treesize of output 247 [2022-03-03 19:13:48,059 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:48,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 211 [2022-03-03 19:13:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:48,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494472803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:48,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:48,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:13:48,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411510347] [2022-03-03 19:13:48,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:48,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:13:48,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:13:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:13:48,171 INFO L87 Difference]: Start difference. First operand 432 states and 1439 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:48,929 INFO L93 Difference]: Finished difference Result 1224 states and 3958 transitions. [2022-03-03 19:13:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:13:48,929 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 [2022-03-03 19:13:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:48,931 INFO L225 Difference]: With dead ends: 1224 [2022-03-03 19:13:48,931 INFO L226 Difference]: Without dead ends: 1072 [2022-03-03 19:13:48,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:13:48,932 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 388 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1042 Invalid, 0 Unknown, 361 Unchecked, 0.3s Time] [2022-03-03 19:13:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-03-03 19:13:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 490. [2022-03-03 19:13:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.539877300613497) internal successors, (1731), 489 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1731 transitions. [2022-03-03 19:13:48,939 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1731 transitions. Word has length 23 [2022-03-03 19:13:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:48,940 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1731 transitions. [2022-03-03 19:13:48,940 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) [2022-03-03 19:13:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1731 transitions. [2022-03-03 19:13:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:48,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:48,940 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] [2022-03-03 19:13:48,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-03 19:13:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-03 19:13:49,154 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1523369173, now seen corresponding path program 222 times [2022-03-03 19:13:49,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:49,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164860844] [2022-03-03 19:13:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:49,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:49,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164860844] [2022-03-03 19:13:49,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164860844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:49,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842687075] [2022-03-03 19:13:49,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:13:49,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:49,288 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) [2022-03-03 19:13:49,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-03 19:13:49,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:13:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:49,655 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 228 treesize of output 198 [2022-03-03 19:13:50,236 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 128 treesize of output 112 [2022-03-03 19:13:50,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:50,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:13:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:50,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:50,565 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 171 treesize of output 151 [2022-03-03 19:13:50,968 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 231 treesize of output 203 [2022-03-03 19:13:50,975 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:50,975 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 210 treesize of output 187 [2022-03-03 19:13:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:51,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842687075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:51,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:51,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:13:51,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488876664] [2022-03-03 19:13:51,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:13:51,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:13:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:13:51,102 INFO L87 Difference]: Start difference. First operand 490 states and 1731 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:51,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:51,558 INFO L93 Difference]: Finished difference Result 792 states and 2642 transitions. [2022-03-03 19:13:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:13:51,558 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 [2022-03-03 19:13:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:51,559 INFO L225 Difference]: With dead ends: 792 [2022-03-03 19:13:51,559 INFO L226 Difference]: Without dead ends: 745 [2022-03-03 19:13:51,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:13:51,560 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:51,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 321 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 701 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2022-03-03 19:13:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-03-03 19:13:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 511. [2022-03-03 19:13:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.5313725490196077) internal successors, (1801), 510 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1801 transitions. [2022-03-03 19:13:51,566 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1801 transitions. Word has length 23 [2022-03-03 19:13:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:51,566 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1801 transitions. [2022-03-03 19:13:51,566 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) [2022-03-03 19:13:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1801 transitions. [2022-03-03 19:13:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:51,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:51,567 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] [2022-03-03 19:13:51,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:51,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:51,784 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:51,785 INFO L85 PathProgramCache]: Analyzing trace with hash -57402743, now seen corresponding path program 223 times [2022-03-03 19:13:51,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:51,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802721923] [2022-03-03 19:13:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:51,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:51,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:51,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802721923] [2022-03-03 19:13:51,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802721923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:51,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161646666] [2022-03-03 19:13:51,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:13:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:51,922 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) [2022-03-03 19:13:51,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-03 19:13:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:52,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:13:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:52,234 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 153 treesize of output 137 [2022-03-03 19:13:52,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:52,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:13:52,800 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 163 treesize of output 147 [2022-03-03 19:13:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:52,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:53,160 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 308 treesize of output 272 [2022-03-03 19:13:53,495 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 239 treesize of output 211 [2022-03-03 19:13:53,502 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:53,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 183 [2022-03-03 19:13:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:13:53,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161646666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:53,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:53,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:13:53,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649601202] [2022-03-03 19:13:53,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:53,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:13:53,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:13:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:13:53,650 INFO L87 Difference]: Start difference. First operand 511 states and 1801 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:13:55,312 INFO L93 Difference]: Finished difference Result 1082 states and 3617 transitions. [2022-03-03 19:13:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:13:55,312 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 [2022-03-03 19:13:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:13:55,314 INFO L225 Difference]: With dead ends: 1082 [2022-03-03 19:13:55,314 INFO L226 Difference]: Without dead ends: 952 [2022-03-03 19:13:55,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=2839, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:13:55,315 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 201 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 1603 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:13:55,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 600 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1603 Invalid, 0 Unknown, 179 Unchecked, 0.6s Time] [2022-03-03 19:13:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-03-03 19:13:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 570. [2022-03-03 19:13:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.6045694200351495) internal successors, (2051), 569 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:13:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 2051 transitions. [2022-03-03 19:13:55,322 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 2051 transitions. Word has length 23 [2022-03-03 19:13:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:13:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 2051 transitions. [2022-03-03 19:13:55,323 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) [2022-03-03 19:13:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 2051 transitions. [2022-03-03 19:13:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:13:55,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:13:55,324 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] [2022-03-03 19:13:55,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-03-03 19:13:55,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:55,539 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:13:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:13:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash -192457175, now seen corresponding path program 224 times [2022-03-03 19:13:55,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:13:55,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257952567] [2022-03-03 19:13:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:13:55,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:13:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:13:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:13:55,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:13:55,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257952567] [2022-03-03 19:13:55,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257952567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:13:55,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441739152] [2022-03-03 19:13:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:13:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:13:55,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:13:55,671 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) [2022-03-03 19:13:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-03 19:13:55,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:13:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:13:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:13:55,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:13:56,060 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 275 treesize of output 237 [2022-03-03 19:13:56,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:13:56,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:13:56,618 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:13:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:13:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:13:57,214 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 373 treesize of output 333 [2022-03-03 19:13:57,789 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 312 treesize of output 272 [2022-03-03 19:13:57,808 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:13:57,809 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 279 treesize of output 240 [2022-03-03 19:13:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:13:57,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441739152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:13:57,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:13:57,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:13:57,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689942917] [2022-03-03 19:13:57,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:13:57,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:13:57,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:13:57,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:13:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:13:57,975 INFO L87 Difference]: Start difference. First operand 570 states and 2051 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:00,641 INFO L93 Difference]: Finished difference Result 1528 states and 4828 transitions. [2022-03-03 19:14:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:14:00,641 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 [2022-03-03 19:14:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:00,644 INFO L225 Difference]: With dead ends: 1528 [2022-03-03 19:14:00,644 INFO L226 Difference]: Without dead ends: 1133 [2022-03-03 19:14:00,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=568, Invalid=6074, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:14:00,645 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 289 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:00,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 862 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2035 Invalid, 0 Unknown, 366 Unchecked, 0.8s Time] [2022-03-03 19:14:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-03 19:14:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 648. [2022-03-03 19:14:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-03-03 19:14:00,653 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-03-03 19:14:00,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:00,654 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-03-03 19:14:00,654 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) [2022-03-03 19:14:00,654 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-03-03 19:14:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:00,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:00,655 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] [2022-03-03 19:14:00,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-03 19:14:00,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:00,867 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1898578769, now seen corresponding path program 225 times [2022-03-03 19:14:00,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:00,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001615855] [2022-03-03 19:14:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:00,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:00,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001615855] [2022-03-03 19:14:00,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001615855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:00,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415584639] [2022-03-03 19:14:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:14:00,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:00,948 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) [2022-03-03 19:14:00,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-03 19:14:01,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:14:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:01,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:01,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:01,316 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 218 treesize of output 188 [2022-03-03 19:14:01,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:01,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:14:01,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-03 19:14:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:01,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:02,087 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 171 treesize of output 151 [2022-03-03 19:14:02,362 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 235 treesize of output 207 [2022-03-03 19:14:02,369 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:02,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-03-03 19:14:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:02,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415584639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:02,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:02,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:14:02,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162690193] [2022-03-03 19:14:02,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:02,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:14:02,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:14:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:14:02,496 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:02,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:02,899 INFO L93 Difference]: Finished difference Result 829 states and 2815 transitions. [2022-03-03 19:14:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:14:02,899 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 [2022-03-03 19:14:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:02,901 INFO L225 Difference]: With dead ends: 829 [2022-03-03 19:14:02,901 INFO L226 Difference]: Without dead ends: 793 [2022-03-03 19:14:02,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:14:02,901 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:02,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 264 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 688 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-03 19:14:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-03 19:14:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 648. [2022-03-03 19:14:02,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-03-03 19:14:02,908 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-03-03 19:14:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:02,909 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-03-03 19:14:02,909 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) [2022-03-03 19:14:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-03-03 19:14:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:02,909 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:02,910 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] [2022-03-03 19:14:02,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-03-03 19:14:03,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-03-03 19:14:03,115 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 637099387, now seen corresponding path program 226 times [2022-03-03 19:14:03,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:03,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583261403] [2022-03-03 19:14:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:03,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:03,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:03,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583261403] [2022-03-03 19:14:03,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583261403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:03,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487317911] [2022-03-03 19:14:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:14:03,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:03,215 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) [2022-03-03 19:14:03,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-03 19:14:03,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:14:03,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:03,534 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 173 treesize of output 155 [2022-03-03 19:14:04,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:04,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:14:04,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 192 [2022-03-03 19:14:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:04,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-03 19:14:04,800 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 275 treesize of output 239 [2022-03-03 19:14:04,808 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:04,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 211 [2022-03-03 19:14:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:04,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487317911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:04,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:04,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:14:04,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650721094] [2022-03-03 19:14:04,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:04,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:14:04,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:04,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:14:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:14:04,942 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:05,246 INFO L93 Difference]: Finished difference Result 838 states and 2843 transitions. [2022-03-03 19:14:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:14:05,246 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 [2022-03-03 19:14:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:05,248 INFO L225 Difference]: With dead ends: 838 [2022-03-03 19:14:05,248 INFO L226 Difference]: Without dead ends: 809 [2022-03-03 19:14:05,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:14:05,248 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 169 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:05,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 272 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 683 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-03 19:14:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-03 19:14:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 648. [2022-03-03 19:14:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 3.527047913446677) internal successors, (2282), 647 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2282 transitions. [2022-03-03 19:14:05,262 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2282 transitions. Word has length 23 [2022-03-03 19:14:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:05,262 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 2282 transitions. [2022-03-03 19:14:05,262 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) [2022-03-03 19:14:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2282 transitions. [2022-03-03 19:14:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:05,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:05,263 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] [2022-03-03 19:14:05,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:05,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-03 19:14:05,479 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:05,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash 882528537, now seen corresponding path program 227 times [2022-03-03 19:14:05,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:05,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079292216] [2022-03-03 19:14:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:05,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:05,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079292216] [2022-03-03 19:14:05,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079292216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:05,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645431245] [2022-03-03 19:14:05,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:14:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:05,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:05,599 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) [2022-03-03 19:14:05,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-03 19:14:05,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:05,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:05,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 157 [2022-03-03 19:14:06,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-03 19:14:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:06,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:14:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:06,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:06,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-03 19:14:06,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 245 [2022-03-03 19:14:06,988 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:06,989 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 252 treesize of output 215 [2022-03-03 19:14:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:07,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645431245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:07,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:07,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:14:07,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870530489] [2022-03-03 19:14:07,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:07,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:14:07,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:14:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:14:07,151 INFO L87 Difference]: Start difference. First operand 648 states and 2282 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:08,021 INFO L93 Difference]: Finished difference Result 1325 states and 4137 transitions. [2022-03-03 19:14:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:14:08,021 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 [2022-03-03 19:14:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:08,023 INFO L225 Difference]: With dead ends: 1325 [2022-03-03 19:14:08,023 INFO L226 Difference]: Without dead ends: 1184 [2022-03-03 19:14:08,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:14:08,024 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 220 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:08,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 527 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1150 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-03-03 19:14:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-03-03 19:14:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 702. [2022-03-03 19:14:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 701 states have (on average 3.470756062767475) internal successors, (2433), 701 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2433 transitions. [2022-03-03 19:14:08,056 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2433 transitions. Word has length 23 [2022-03-03 19:14:08,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:08,056 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2433 transitions. [2022-03-03 19:14:08,056 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) [2022-03-03 19:14:08,056 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2433 transitions. [2022-03-03 19:14:08,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:08,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:08,057 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] [2022-03-03 19:14:08,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:08,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-03 19:14:08,274 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1725232039, now seen corresponding path program 228 times [2022-03-03 19:14:08,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:08,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034302525] [2022-03-03 19:14:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:08,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:08,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034302525] [2022-03-03 19:14:08,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034302525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:08,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479234085] [2022-03-03 19:14:08,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:14:08,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:08,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:08,475 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) [2022-03-03 19:14:08,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-03 19:14:08,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:14:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:08,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:08,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:08,825 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 216 treesize of output 186 [2022-03-03 19:14:09,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-03 19:14:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:09,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:14:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:09,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:09,608 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 171 treesize of output 151 [2022-03-03 19:14:09,890 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 247 treesize of output 219 [2022-03-03 19:14:09,909 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:09,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 226 treesize of output 203 [2022-03-03 19:14:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:10,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479234085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:10,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:10,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:14:10,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807680400] [2022-03-03 19:14:10,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:10,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:14:10,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:10,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:14:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:14:10,053 INFO L87 Difference]: Start difference. First operand 702 states and 2433 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:13,108 INFO L93 Difference]: Finished difference Result 1518 states and 4983 transitions. [2022-03-03 19:14:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:14:13,108 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 [2022-03-03 19:14:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:13,111 INFO L225 Difference]: With dead ends: 1518 [2022-03-03 19:14:13,111 INFO L226 Difference]: Without dead ends: 1411 [2022-03-03 19:14:13,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=873, Invalid=6959, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 19:14:13,112 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 246 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 522 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:13,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 689 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1953 Invalid, 0 Unknown, 522 Unchecked, 0.6s Time] [2022-03-03 19:14:13,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-03-03 19:14:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 699. [2022-03-03 19:14:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.4656160458452723) internal successors, (2419), 698 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2419 transitions. [2022-03-03 19:14:13,133 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2419 transitions. Word has length 23 [2022-03-03 19:14:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:13,133 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2419 transitions. [2022-03-03 19:14:13,133 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) [2022-03-03 19:14:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2419 transitions. [2022-03-03 19:14:13,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:13,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:13,134 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] [2022-03-03 19:14:13,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:13,351 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:13,352 INFO L85 PathProgramCache]: Analyzing trace with hash -150983109, now seen corresponding path program 229 times [2022-03-03 19:14:13,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:13,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883579350] [2022-03-03 19:14:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:13,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:13,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883579350] [2022-03-03 19:14:13,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883579350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:13,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119866222] [2022-03-03 19:14:13,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:14:13,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:13,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:13,458 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) [2022-03-03 19:14:13,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-03 19:14:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:13,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:14:14,531 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 208 treesize of output 174 [2022-03-03 19:14:14,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:14,535 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 206 treesize of output 178 [2022-03-03 19:14:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:14,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:14,990 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 274 treesize of output 246 [2022-03-03 19:14:15,375 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:15,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-03 19:14:15,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:15,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119866222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:15,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:15,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:14:15,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767970171] [2022-03-03 19:14:15,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:14:15,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:14:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:14:15,521 INFO L87 Difference]: Start difference. First operand 699 states and 2419 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:16,523 INFO L93 Difference]: Finished difference Result 1114 states and 3636 transitions. [2022-03-03 19:14:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:14:16,523 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 [2022-03-03 19:14:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:16,525 INFO L225 Difference]: With dead ends: 1114 [2022-03-03 19:14:16,525 INFO L226 Difference]: Without dead ends: 1016 [2022-03-03 19:14:16,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:14:16,525 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:16,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 601 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1267 Invalid, 0 Unknown, 541 Unchecked, 0.4s Time] [2022-03-03 19:14:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-03-03 19:14:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 705. [2022-03-03 19:14:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.4744318181818183) internal successors, (2446), 704 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2446 transitions. [2022-03-03 19:14:16,535 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2446 transitions. Word has length 23 [2022-03-03 19:14:16,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:16,535 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 2446 transitions. [2022-03-03 19:14:16,535 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) [2022-03-03 19:14:16,535 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2446 transitions. [2022-03-03 19:14:16,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:16,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:16,536 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] [2022-03-03 19:14:16,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-03 19:14:16,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-03-03 19:14:16,752 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash -97398047, now seen corresponding path program 230 times [2022-03-03 19:14:16,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:16,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745614891] [2022-03-03 19:14:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:16,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:16,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:16,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745614891] [2022-03-03 19:14:16,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745614891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:16,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938552549] [2022-03-03 19:14:16,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:14:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:16,822 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) [2022-03-03 19:14:16,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-03 19:14:16,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:16,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:17,065 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 181 treesize of output 157 [2022-03-03 19:14:17,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-03 19:14:17,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:17,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:14:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:17,805 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 241 treesize of output 209 [2022-03-03 19:14:18,098 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 275 treesize of output 247 [2022-03-03 19:14:18,105 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:18,105 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 254 treesize of output 211 [2022-03-03 19:14:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:18,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938552549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:18,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:18,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:14:18,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820480185] [2022-03-03 19:14:18,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:18,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:14:18,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:14:18,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:14:18,213 INFO L87 Difference]: Start difference. First operand 705 states and 2446 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:18,358 INFO L93 Difference]: Finished difference Result 890 states and 2974 transitions. [2022-03-03 19:14:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:14:18,358 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 [2022-03-03 19:14:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:18,359 INFO L225 Difference]: With dead ends: 890 [2022-03-03 19:14:18,359 INFO L226 Difference]: Without dead ends: 843 [2022-03-03 19:14:18,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:14:18,360 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 127 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:18,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 222 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 451 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-03-03 19:14:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-03-03 19:14:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 734. [2022-03-03 19:14:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.442019099590723) internal successors, (2523), 733 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2523 transitions. [2022-03-03 19:14:18,368 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2523 transitions. Word has length 23 [2022-03-03 19:14:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:18,368 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2523 transitions. [2022-03-03 19:14:18,368 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) [2022-03-03 19:14:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2523 transitions. [2022-03-03 19:14:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:18,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:18,369 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] [2022-03-03 19:14:18,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-03 19:14:18,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-03-03 19:14:18,583 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2125767515, now seen corresponding path program 231 times [2022-03-03 19:14:18,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:18,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606839751] [2022-03-03 19:14:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:18,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:18,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:18,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606839751] [2022-03-03 19:14:18,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606839751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:18,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345705040] [2022-03-03 19:14:18,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:14:18,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:18,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:18,678 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) [2022-03-03 19:14:18,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-03 19:14:18,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:14:18,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:18,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:19,011 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 173 treesize of output 155 [2022-03-03 19:14:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:19,805 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 188 treesize of output 162 [2022-03-03 19:14:19,808 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 136 treesize of output 122 [2022-03-03 19:14:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:19,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:20,120 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 241 treesize of output 209 [2022-03-03 19:14:20,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:20,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:14:20,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:20,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345705040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:20,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:20,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:14:20,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130043937] [2022-03-03 19:14:20,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:20,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:14:20,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:14:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:14:20,658 INFO L87 Difference]: Start difference. First operand 734 states and 2523 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:21,601 INFO L93 Difference]: Finished difference Result 1070 states and 3557 transitions. [2022-03-03 19:14:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:14:21,601 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 [2022-03-03 19:14:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:21,603 INFO L225 Difference]: With dead ends: 1070 [2022-03-03 19:14:21,603 INFO L226 Difference]: Without dead ends: 995 [2022-03-03 19:14:21,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:14:21,603 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 161 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:21,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 431 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 761 Invalid, 0 Unknown, 323 Unchecked, 0.3s Time] [2022-03-03 19:14:21,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-03 19:14:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 727. [2022-03-03 19:14:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.43801652892562) internal successors, (2496), 726 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:21,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2496 transitions. [2022-03-03 19:14:21,612 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2496 transitions. Word has length 23 [2022-03-03 19:14:21,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:21,612 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 2496 transitions. [2022-03-03 19:14:21,612 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) [2022-03-03 19:14:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2496 transitions. [2022-03-03 19:14:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:21,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:21,613 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] [2022-03-03 19:14:21,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-03 19:14:21,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-03 19:14:21,814 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:21,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1890464561, now seen corresponding path program 232 times [2022-03-03 19:14:21,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:21,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619704579] [2022-03-03 19:14:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:21,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:22,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:22,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619704579] [2022-03-03 19:14:22,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619704579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:22,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578459773] [2022-03-03 19:14:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:14:22,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:22,004 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) [2022-03-03 19:14:22,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-03 19:14:22,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:14:22,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:14:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:22,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-03 19:14:22,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 189 [2022-03-03 19:14:22,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:22,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 184 [2022-03-03 19:14:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:23,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:23,581 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 325 treesize of output 285 [2022-03-03 19:14:24,008 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:24,008 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 316 treesize of output 273 [2022-03-03 19:14:24,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:24,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578459773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:24,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:24,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:14:24,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802708658] [2022-03-03 19:14:24,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:24,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:14:24,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:14:24,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:14:24,136 INFO L87 Difference]: Start difference. First operand 727 states and 2496 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:26,233 INFO L93 Difference]: Finished difference Result 1434 states and 4529 transitions. [2022-03-03 19:14:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:14:26,233 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 [2022-03-03 19:14:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:26,235 INFO L225 Difference]: With dead ends: 1434 [2022-03-03 19:14:26,235 INFO L226 Difference]: Without dead ends: 1281 [2022-03-03 19:14:26,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=576, Invalid=5904, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:14:26,236 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 209 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:26,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 945 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2275 Invalid, 0 Unknown, 363 Unchecked, 0.7s Time] [2022-03-03 19:14:26,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-03-03 19:14:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 776. [2022-03-03 19:14:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.5006451612903224) internal successors, (2713), 775 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2713 transitions. [2022-03-03 19:14:26,247 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2713 transitions. Word has length 23 [2022-03-03 19:14:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:26,247 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2713 transitions. [2022-03-03 19:14:26,247 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) [2022-03-03 19:14:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2713 transitions. [2022-03-03 19:14:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:26,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:26,248 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] [2022-03-03 19:14:26,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:26,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:26,453 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1393962373, now seen corresponding path program 233 times [2022-03-03 19:14:26,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:26,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270215810] [2022-03-03 19:14:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:26,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:26,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:26,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270215810] [2022-03-03 19:14:26,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270215810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:26,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071269626] [2022-03-03 19:14:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:14:26,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:26,562 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) [2022-03-03 19:14:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-03 19:14:26,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:26,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:26,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-03 19:14:27,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:27,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:14:27,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 181 [2022-03-03 19:14:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:27,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:27,850 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 230 treesize of output 210 [2022-03-03 19:14:28,209 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 247 treesize of output 219 [2022-03-03 19:14:28,218 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:28,218 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 226 treesize of output 203 [2022-03-03 19:14:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:28,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071269626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:28,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:28,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:14:28,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777475313] [2022-03-03 19:14:28,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:28,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:14:28,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:14:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:14:28,422 INFO L87 Difference]: Start difference. First operand 776 states and 2713 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:28,582 INFO L93 Difference]: Finished difference Result 988 states and 3328 transitions. [2022-03-03 19:14:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:14:28,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:14:28,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:28,584 INFO L225 Difference]: With dead ends: 988 [2022-03-03 19:14:28,584 INFO L226 Difference]: Without dead ends: 941 [2022-03-03 19:14:28,584 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 [2022-03-03 19:14:28,584 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:28,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 185 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-03-03 19:14:28,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-03 19:14:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 830. [2022-03-03 19:14:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4632086851628467) internal successors, (2871), 829 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2871 transitions. [2022-03-03 19:14:28,594 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2871 transitions. Word has length 23 [2022-03-03 19:14:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:28,594 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2871 transitions. [2022-03-03 19:14:28,594 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) [2022-03-03 19:14:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2871 transitions. [2022-03-03 19:14:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:28,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:28,595 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] [2022-03-03 19:14:28,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-03 19:14:28,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:28,796 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:28,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1089657063, now seen corresponding path program 234 times [2022-03-03 19:14:28,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:28,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917398539] [2022-03-03 19:14:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:28,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:28,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:28,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917398539] [2022-03-03 19:14:28,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917398539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:28,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203841715] [2022-03-03 19:14:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:14:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:28,943 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) [2022-03-03 19:14:28,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-03 19:14:29,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:14:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:29,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:29,317 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 237 treesize of output 211 [2022-03-03 19:14:29,755 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 148 treesize of output 128 [2022-03-03 19:14:29,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:29,757 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 [2022-03-03 19:14:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:29,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:30,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-03 19:14:30,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:14:30,650 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:30,650 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 288 treesize of output 249 [2022-03-03 19:14:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:30,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203841715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:30,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:30,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 19:14:30,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418287420] [2022-03-03 19:14:30,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:30,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:14:30,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:14:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:14:30,862 INFO L87 Difference]: Start difference. First operand 830 states and 2871 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:31,723 INFO L93 Difference]: Finished difference Result 1611 states and 5560 transitions. [2022-03-03 19:14:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:14:31,723 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 [2022-03-03 19:14:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:31,726 INFO L225 Difference]: With dead ends: 1611 [2022-03-03 19:14:31,726 INFO L226 Difference]: Without dead ends: 1493 [2022-03-03 19:14:31,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=2184, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:14:31,726 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 149 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:31,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 716 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1262 Invalid, 0 Unknown, 414 Unchecked, 0.4s Time] [2022-03-03 19:14:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-03-03 19:14:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 875. [2022-03-03 19:14:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4393592677345537) internal successors, (3006), 874 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:31,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3006 transitions. [2022-03-03 19:14:31,739 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3006 transitions. Word has length 23 [2022-03-03 19:14:31,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:31,739 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 3006 transitions. [2022-03-03 19:14:31,739 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) [2022-03-03 19:14:31,739 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3006 transitions. [2022-03-03 19:14:31,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:31,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:31,740 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] [2022-03-03 19:14:31,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:31,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:31,957 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:31,958 INFO L85 PathProgramCache]: Analyzing trace with hash 830567363, now seen corresponding path program 235 times [2022-03-03 19:14:31,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:31,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320970128] [2022-03-03 19:14:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:31,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:32,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:32,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320970128] [2022-03-03 19:14:32,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320970128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:32,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911966721] [2022-03-03 19:14:32,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:14:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:32,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:32,054 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) [2022-03-03 19:14:32,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-03 19:14:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:32,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 213 [2022-03-03 19:14:33,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 128 [2022-03-03 19:14:33,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:33,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-03 19:14:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:33,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:33,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-03-03 19:14:33,910 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 329 treesize of output 285 [2022-03-03 19:14:33,920 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:33,921 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 292 treesize of output 253 [2022-03-03 19:14:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:34,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911966721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:34,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:34,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:14:34,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351502114] [2022-03-03 19:14:34,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:34,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:14:34,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:34,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:14:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:14:34,116 INFO L87 Difference]: Start difference. First operand 875 states and 3006 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:34,226 INFO L93 Difference]: Finished difference Result 1083 states and 3619 transitions. [2022-03-03 19:14:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:14:34,227 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 [2022-03-03 19:14:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:34,228 INFO L225 Difference]: With dead ends: 1083 [2022-03-03 19:14:34,228 INFO L226 Difference]: Without dead ends: 1046 [2022-03-03 19:14:34,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:14:34,228 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:34,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 272 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-03-03 19:14:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-03 19:14:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 911. [2022-03-03 19:14:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.4285714285714284) internal successors, (3120), 910 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3120 transitions. [2022-03-03 19:14:34,238 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3120 transitions. Word has length 23 [2022-03-03 19:14:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:34,238 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 3120 transitions. [2022-03-03 19:14:34,238 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) [2022-03-03 19:14:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3120 transitions. [2022-03-03 19:14:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:34,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:34,239 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] [2022-03-03 19:14:34,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:34,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:34,456 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2114107551, now seen corresponding path program 236 times [2022-03-03 19:14:34,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:34,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318124337] [2022-03-03 19:14:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:34,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:34,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:34,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318124337] [2022-03-03 19:14:34,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318124337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:34,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139679405] [2022-03-03 19:14:34,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:14:34,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:34,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:34,631 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) [2022-03-03 19:14:34,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-03 19:14:34,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:34,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:34,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:35,143 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 320 treesize of output 268 [2022-03-03 19:14:35,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-03 19:14:35,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:35,816 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:14:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:36,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:36,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 276 [2022-03-03 19:14:36,722 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:36,722 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 191 treesize of output 168 [2022-03-03 19:14:36,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:14:36,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139679405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:36,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:36,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:14:36,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589452264] [2022-03-03 19:14:36,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:36,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:14:36,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:36,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:14:36,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:14:36,875 INFO L87 Difference]: Start difference. First operand 911 states and 3120 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:37,914 INFO L93 Difference]: Finished difference Result 1467 states and 4707 transitions. [2022-03-03 19:14:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:14:37,915 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 [2022-03-03 19:14:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:37,917 INFO L225 Difference]: With dead ends: 1467 [2022-03-03 19:14:37,917 INFO L226 Difference]: Without dead ends: 1425 [2022-03-03 19:14:37,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=2197, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:14:37,918 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 158 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:37,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 774 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 975 Invalid, 0 Unknown, 391 Unchecked, 0.4s Time] [2022-03-03 19:14:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2022-03-03 19:14:37,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 965. [2022-03-03 19:14:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.412863070539419) internal successors, (3290), 964 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3290 transitions. [2022-03-03 19:14:37,931 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3290 transitions. Word has length 23 [2022-03-03 19:14:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:37,932 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 3290 transitions. [2022-03-03 19:14:37,932 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) [2022-03-03 19:14:37,935 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3290 transitions. [2022-03-03 19:14:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:37,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:37,937 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] [2022-03-03 19:14:37,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:38,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-03 19:14:38,139 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:38,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 685809875, now seen corresponding path program 237 times [2022-03-03 19:14:38,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:38,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041271654] [2022-03-03 19:14:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:38,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:38,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041271654] [2022-03-03 19:14:38,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041271654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:38,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269883396] [2022-03-03 19:14:38,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:14:38,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:38,241 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) [2022-03-03 19:14:38,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-03 19:14:38,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:14:38,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:38,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:38,620 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 173 treesize of output 155 [2022-03-03 19:14:39,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:39,137 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 160 [2022-03-03 19:14:39,140 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 134 treesize of output 120 [2022-03-03 19:14:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:39,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:39,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 217 [2022-03-03 19:14:39,792 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:39,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-03-03 19:14:39,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:39,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269883396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:39,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:39,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:14:39,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150128931] [2022-03-03 19:14:39,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:39,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:14:39,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:14:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:14:39,926 INFO L87 Difference]: Start difference. First operand 965 states and 3290 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:40,032 INFO L93 Difference]: Finished difference Result 1177 states and 3903 transitions. [2022-03-03 19:14:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:14:40,037 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 [2022-03-03 19:14:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:40,042 INFO L225 Difference]: With dead ends: 1177 [2022-03-03 19:14:40,042 INFO L226 Difference]: Without dead ends: 1158 [2022-03-03 19:14:40,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:14:40,044 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:40,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 291 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 0 Unknown, 316 Unchecked, 0.1s Time] [2022-03-03 19:14:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-03-03 19:14:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 989. [2022-03-03 19:14:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 3.402834008097166) internal successors, (3362), 988 states have internal predecessors, (3362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 3362 transitions. [2022-03-03 19:14:40,058 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 3362 transitions. Word has length 23 [2022-03-03 19:14:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:40,059 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 3362 transitions. [2022-03-03 19:14:40,059 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) [2022-03-03 19:14:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 3362 transitions. [2022-03-03 19:14:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:40,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:40,060 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] [2022-03-03 19:14:40,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:40,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:40,277 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:40,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:40,277 INFO L85 PathProgramCache]: Analyzing trace with hash 188566481, now seen corresponding path program 238 times [2022-03-03 19:14:40,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:40,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826443719] [2022-03-03 19:14:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:40,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:40,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826443719] [2022-03-03 19:14:40,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826443719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:40,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456032996] [2022-03-03 19:14:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:14:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:40,379 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) [2022-03-03 19:14:40,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-03 19:14:40,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:14:40,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:40,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:40,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:40,805 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 277 treesize of output 241 [2022-03-03 19:14:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:41,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 195 [2022-03-03 19:14:41,460 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 169 treesize of output 153 [2022-03-03 19:14:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:41,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:41,743 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 222 treesize of output 190 [2022-03-03 19:14:41,979 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:41,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 143 [2022-03-03 19:14:41,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:42,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456032996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:42,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:42,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:14:42,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814914472] [2022-03-03 19:14:42,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:42,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:14:42,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:14:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:14:42,131 INFO L87 Difference]: Start difference. First operand 989 states and 3362 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:42,322 INFO L93 Difference]: Finished difference Result 1359 states and 4440 transitions. [2022-03-03 19:14:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:14:42,323 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 [2022-03-03 19:14:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:42,325 INFO L225 Difference]: With dead ends: 1359 [2022-03-03 19:14:42,325 INFO L226 Difference]: Without dead ends: 1300 [2022-03-03 19:14:42,325 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 [2022-03-03 19:14:42,326 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:42,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 246 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 292 Unchecked, 0.1s Time] [2022-03-03 19:14:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-03-03 19:14:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1065. [2022-03-03 19:14:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 3.369360902255639) internal successors, (3585), 1064 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 3585 transitions. [2022-03-03 19:14:42,339 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 3585 transitions. Word has length 23 [2022-03-03 19:14:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:42,339 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 3585 transitions. [2022-03-03 19:14:42,339 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) [2022-03-03 19:14:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 3585 transitions. [2022-03-03 19:14:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:42,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:42,340 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] [2022-03-03 19:14:42,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-03 19:14:42,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-03 19:14:42,558 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1255182127, now seen corresponding path program 239 times [2022-03-03 19:14:42,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:42,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377751044] [2022-03-03 19:14:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:42,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:42,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:42,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377751044] [2022-03-03 19:14:42,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377751044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:42,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758427936] [2022-03-03 19:14:42,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:14:42,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:42,751 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) [2022-03-03 19:14:42,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-03 19:14:43,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:43,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:43,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:43,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:43,188 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 284 treesize of output 244 [2022-03-03 19:14:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:43,646 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 227 treesize of output 197 [2022-03-03 19:14:43,649 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 171 treesize of output 155 [2022-03-03 19:14:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:43,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:43,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:44,330 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 329 treesize of output 281 [2022-03-03 19:14:44,338 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:44,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 253 [2022-03-03 19:14:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:44,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758427936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:44,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:44,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:14:44,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307744309] [2022-03-03 19:14:44,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:44,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:14:44,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:44,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:14:44,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:14:44,517 INFO L87 Difference]: Start difference. First operand 1065 states and 3585 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:45,165 INFO L93 Difference]: Finished difference Result 1507 states and 4856 transitions. [2022-03-03 19:14:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:14:45,165 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 [2022-03-03 19:14:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:45,168 INFO L225 Difference]: With dead ends: 1507 [2022-03-03 19:14:45,168 INFO L226 Difference]: Without dead ends: 1436 [2022-03-03 19:14:45,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:14:45,168 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 134 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:45,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 569 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 876 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-03-03 19:14:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2022-03-03 19:14:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1069. [2022-03-03 19:14:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.3670411985018727) internal successors, (3596), 1068 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3596 transitions. [2022-03-03 19:14:45,181 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3596 transitions. Word has length 23 [2022-03-03 19:14:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:45,181 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3596 transitions. [2022-03-03 19:14:45,181 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) [2022-03-03 19:14:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3596 transitions. [2022-03-03 19:14:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:45,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:45,182 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] [2022-03-03 19:14:45,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:45,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-03 19:14:45,395 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1755340789, now seen corresponding path program 240 times [2022-03-03 19:14:45,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:45,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112568107] [2022-03-03 19:14:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:45,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:45,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:45,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112568107] [2022-03-03 19:14:45,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112568107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:45,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228852091] [2022-03-03 19:14:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:14:45,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:45,547 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) [2022-03-03 19:14:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-03 19:14:45,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:14:45,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:45,920 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 224 treesize of output 194 [2022-03-03 19:14:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:46,476 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-03-03 19:14:46,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2022-03-03 19:14:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:46,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:46,956 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 272 treesize of output 244 [2022-03-03 19:14:47,343 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 233 treesize of output 205 [2022-03-03 19:14:47,351 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:47,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 189 [2022-03-03 19:14:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:47,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228852091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:47,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:47,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:14:47,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832263885] [2022-03-03 19:14:47,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:47,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:14:47,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:47,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:14:47,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:14:47,539 INFO L87 Difference]: Start difference. First operand 1069 states and 3596 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:48,494 INFO L93 Difference]: Finished difference Result 1639 states and 5179 transitions. [2022-03-03 19:14:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:14:48,494 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 [2022-03-03 19:14:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:48,497 INFO L225 Difference]: With dead ends: 1639 [2022-03-03 19:14:48,497 INFO L226 Difference]: Without dead ends: 1592 [2022-03-03 19:14:48,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:14:48,498 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 182 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:48,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 873 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1080 Invalid, 0 Unknown, 427 Unchecked, 0.3s Time] [2022-03-03 19:14:48,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-03-03 19:14:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1122. [2022-03-03 19:14:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.3425512934879573) internal successors, (3747), 1121 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3747 transitions. [2022-03-03 19:14:48,513 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3747 transitions. Word has length 23 [2022-03-03 19:14:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:48,513 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 3747 transitions. [2022-03-03 19:14:48,513 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) [2022-03-03 19:14:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3747 transitions. [2022-03-03 19:14:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:48,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:48,514 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] [2022-03-03 19:14:48,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:48,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:48,731 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:48,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1346898995, now seen corresponding path program 241 times [2022-03-03 19:14:48,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:48,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901528091] [2022-03-03 19:14:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:48,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:48,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901528091] [2022-03-03 19:14:48,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901528091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:48,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864112384] [2022-03-03 19:14:48,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:14:48,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:48,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:48,814 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) [2022-03-03 19:14:48,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-03 19:14:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:49,149 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 153 treesize of output 137 [2022-03-03 19:14:49,622 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 128 treesize of output 112 [2022-03-03 19:14:49,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:49,624 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:14:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:49,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:49,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-03 19:14:50,142 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 239 treesize of output 211 [2022-03-03 19:14:50,150 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:50,151 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 218 treesize of output 183 [2022-03-03 19:14:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:50,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864112384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:50,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:50,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:14:50,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764909745] [2022-03-03 19:14:50,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:50,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:14:50,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:14:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:14:50,266 INFO L87 Difference]: Start difference. First operand 1122 states and 3747 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:50,535 INFO L93 Difference]: Finished difference Result 1612 states and 5172 transitions. [2022-03-03 19:14:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:14:50,536 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 [2022-03-03 19:14:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:50,539 INFO L225 Difference]: With dead ends: 1612 [2022-03-03 19:14:50,539 INFO L226 Difference]: Without dead ends: 1590 [2022-03-03 19:14:50,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:14:50,539 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 613 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:50,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 343 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 548 Invalid, 0 Unknown, 613 Unchecked, 0.2s Time] [2022-03-03 19:14:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2022-03-03 19:14:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1138. [2022-03-03 19:14:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 3.337730870712401) internal successors, (3795), 1137 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 3795 transitions. [2022-03-03 19:14:50,555 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 3795 transitions. Word has length 23 [2022-03-03 19:14:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:50,555 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 3795 transitions. [2022-03-03 19:14:50,556 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) [2022-03-03 19:14:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 3795 transitions. [2022-03-03 19:14:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:50,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:50,557 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] [2022-03-03 19:14:50,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:50,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:50,774 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:50,775 INFO L85 PathProgramCache]: Analyzing trace with hash 800499773, now seen corresponding path program 242 times [2022-03-03 19:14:50,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:50,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21472342] [2022-03-03 19:14:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:50,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:50,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21472342] [2022-03-03 19:14:50,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21472342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:50,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078414113] [2022-03-03 19:14:50,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:14:50,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:50,879 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) [2022-03-03 19:14:50,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-03 19:14:51,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:14:51,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:51,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:14:51,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:51,244 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 153 treesize of output 137 [2022-03-03 19:14:51,655 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 148 treesize of output 128 [2022-03-03 19:14:51,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:51,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:14:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:51,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:51,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:14:52,287 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 247 treesize of output 219 [2022-03-03 19:14:52,294 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:52,295 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 226 treesize of output 203 [2022-03-03 19:14:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:14:52,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078414113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:52,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:52,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:14:52,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423241856] [2022-03-03 19:14:52,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:52,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:14:52,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:14:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:14:52,433 INFO L87 Difference]: Start difference. First operand 1138 states and 3795 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:53,535 INFO L93 Difference]: Finished difference Result 1839 states and 5752 transitions. [2022-03-03 19:14:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:14:53,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:14:53,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:53,538 INFO L225 Difference]: With dead ends: 1839 [2022-03-03 19:14:53,538 INFO L226 Difference]: Without dead ends: 1716 [2022-03-03 19:14:53,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:14:53,538 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 140 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:53,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 673 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1006 Invalid, 0 Unknown, 353 Unchecked, 0.4s Time] [2022-03-03 19:14:53,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-03-03 19:14:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1214. [2022-03-03 19:14:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.3050288540807915) internal successors, (4009), 1213 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 4009 transitions. [2022-03-03 19:14:53,554 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 4009 transitions. Word has length 23 [2022-03-03 19:14:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:53,554 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 4009 transitions. [2022-03-03 19:14:53,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 4009 transitions. [2022-03-03 19:14:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:53,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:53,555 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] [2022-03-03 19:14:53,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:53,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:53,772 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash -45159791, now seen corresponding path program 243 times [2022-03-03 19:14:53,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:53,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823023504] [2022-03-03 19:14:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:53,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:53,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823023504] [2022-03-03 19:14:53,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823023504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:53,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651096579] [2022-03-03 19:14:53,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:14:53,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:53,874 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) [2022-03-03 19:14:53,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-03 19:14:54,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:14:54,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:14:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:54,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-03 19:14:54,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:54,834 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 248 [2022-03-03 19:14:54,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-03-03 19:14:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:55,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:55,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:14:55,689 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:55,690 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 191 treesize of output 168 [2022-03-03 19:14:55,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:14:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:55,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651096579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:55,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:55,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-03-03 19:14:55,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521602596] [2022-03-03 19:14:55,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:55,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:14:55,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:14:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:14:55,872 INFO L87 Difference]: Start difference. First operand 1214 states and 4009 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:14:56,540 INFO L93 Difference]: Finished difference Result 1671 states and 5342 transitions. [2022-03-03 19:14:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:14:56,541 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 [2022-03-03 19:14:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:14:56,543 INFO L225 Difference]: With dead ends: 1671 [2022-03-03 19:14:56,544 INFO L226 Difference]: Without dead ends: 1606 [2022-03-03 19:14:56,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:14:56,544 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 118 mSDsluCounter, 1091 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:14:56,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 392 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 575 Unchecked, 0.2s Time] [2022-03-03 19:14:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-03-03 19:14:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1142. [2022-03-03 19:14:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 3.322524101665206) internal successors, (3791), 1141 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:14:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3791 transitions. [2022-03-03 19:14:56,558 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3791 transitions. Word has length 23 [2022-03-03 19:14:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:14:56,558 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 3791 transitions. [2022-03-03 19:14:56,558 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) [2022-03-03 19:14:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3791 transitions. [2022-03-03 19:14:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:14:56,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:14:56,559 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] [2022-03-03 19:14:56,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-03 19:14:56,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:56,777 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:14:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:14:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash 254845451, now seen corresponding path program 244 times [2022-03-03 19:14:56,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:14:56,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794157462] [2022-03-03 19:14:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:14:56,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:14:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:14:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:56,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:14:56,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794157462] [2022-03-03 19:14:56,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794157462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:14:56,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196501658] [2022-03-03 19:14:56,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:14:56,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:14:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:14:56,915 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) [2022-03-03 19:14:56,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-03 19:14:57,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:14:57,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:14:57,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:14:57,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:14:57,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-03-03 19:14:58,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:14:58,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:14:58,048 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 257 treesize of output 229 [2022-03-03 19:14:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:58,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:14:58,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 179 [2022-03-03 19:14:59,098 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:14:59,098 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 208 [2022-03-03 19:14:59,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 183 [2022-03-03 19:14:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:14:59,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196501658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:14:59,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:14:59,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:14:59,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771331344] [2022-03-03 19:14:59,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:14:59,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:14:59,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:14:59,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:14:59,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:14:59,305 INFO L87 Difference]: Start difference. First operand 1142 states and 3791 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:00,129 INFO L93 Difference]: Finished difference Result 1767 states and 5549 transitions. [2022-03-03 19:15:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:15:00,129 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 [2022-03-03 19:15:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:00,142 INFO L225 Difference]: With dead ends: 1767 [2022-03-03 19:15:00,142 INFO L226 Difference]: Without dead ends: 1677 [2022-03-03 19:15:00,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:15:00,142 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 114 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:00,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 456 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1039 Invalid, 0 Unknown, 209 Unchecked, 0.4s Time] [2022-03-03 19:15:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-03-03 19:15:00,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 991. [2022-03-03 19:15:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.3777777777777778) internal successors, (3344), 990 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3344 transitions. [2022-03-03 19:15:00,155 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3344 transitions. Word has length 23 [2022-03-03 19:15:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:00,156 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 3344 transitions. [2022-03-03 19:15:00,156 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) [2022-03-03 19:15:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3344 transitions. [2022-03-03 19:15:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:00,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:00,157 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] [2022-03-03 19:15:00,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:00,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:00,371 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash 68979505, now seen corresponding path program 245 times [2022-03-03 19:15:00,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:00,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770928670] [2022-03-03 19:15:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:00,491 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:00,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770928670] [2022-03-03 19:15:00,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770928670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:00,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592778349] [2022-03-03 19:15:00,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:15:00,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:00,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:00,493 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) [2022-03-03 19:15:00,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-03 19:15:00,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:15:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:00,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:15:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:00,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:15:01,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:01,529 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 186 treesize of output 160 [2022-03-03 19:15:01,533 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 151 treesize of output 133 [2022-03-03 19:15:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:01,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:01,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:15:02,413 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:02,413 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 191 treesize of output 168 [2022-03-03 19:15:02,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:15:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:02,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592778349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:02,581 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:02,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:15:02,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305904425] [2022-03-03 19:15:02,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:02,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:15:02,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:15:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:15:02,582 INFO L87 Difference]: Start difference. First operand 991 states and 3344 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:03,200 INFO L93 Difference]: Finished difference Result 1631 states and 5169 transitions. [2022-03-03 19:15:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:15:03,201 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 [2022-03-03 19:15:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:03,203 INFO L225 Difference]: With dead ends: 1631 [2022-03-03 19:15:03,203 INFO L226 Difference]: Without dead ends: 1433 [2022-03-03 19:15:03,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:15:03,204 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 182 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:03,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 372 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 905 Invalid, 0 Unknown, 157 Unchecked, 0.3s Time] [2022-03-03 19:15:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-03-03 19:15:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1049. [2022-03-03 19:15:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.361641221374046) internal successors, (3523), 1048 states have internal predecessors, (3523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3523 transitions. [2022-03-03 19:15:03,217 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3523 transitions. Word has length 23 [2022-03-03 19:15:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:03,217 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3523 transitions. [2022-03-03 19:15:03,217 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) [2022-03-03 19:15:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3523 transitions. [2022-03-03 19:15:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:03,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:03,218 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] [2022-03-03 19:15:03,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:03,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:03,436 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1605372777, now seen corresponding path program 246 times [2022-03-03 19:15:03,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:03,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491175019] [2022-03-03 19:15:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:03,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:15:03,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:03,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491175019] [2022-03-03 19:15:03,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491175019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:03,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654165970] [2022-03-03 19:15:03,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:15:03,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:03,684 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) [2022-03-03 19:15:03,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-03 19:15:03,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:15:03,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:03,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:04,055 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 181 treesize of output 157 [2022-03-03 19:15:04,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:04,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 232 [2022-03-03 19:15:04,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:15:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:05,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:05,361 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 360 treesize of output 324 [2022-03-03 19:15:05,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 219 [2022-03-03 19:15:05,848 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:05,849 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 226 treesize of output 203 [2022-03-03 19:15:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:05,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654165970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:05,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:05,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-03-03 19:15:05,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783930208] [2022-03-03 19:15:05,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:05,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:15:05,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:05,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:15:05,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:15:05,962 INFO L87 Difference]: Start difference. First operand 1049 states and 3523 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:06,694 INFO L93 Difference]: Finished difference Result 1424 states and 4631 transitions. [2022-03-03 19:15:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:15:06,694 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:15:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:06,696 INFO L225 Difference]: With dead ends: 1424 [2022-03-03 19:15:06,696 INFO L226 Difference]: Without dead ends: 1381 [2022-03-03 19:15:06,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:15:06,697 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 164 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:06,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 487 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1126 Invalid, 0 Unknown, 584 Unchecked, 0.3s Time] [2022-03-03 19:15:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-03-03 19:15:06,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1047. [2022-03-03 19:15:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.361376673040153) internal successors, (3516), 1046 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3516 transitions. [2022-03-03 19:15:06,709 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3516 transitions. Word has length 23 [2022-03-03 19:15:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:06,710 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3516 transitions. [2022-03-03 19:15:06,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3516 transitions. [2022-03-03 19:15:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:06,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:06,711 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] [2022-03-03 19:15:06,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:06,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:06,928 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash 220828289, now seen corresponding path program 247 times [2022-03-03 19:15:06,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:06,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749324515] [2022-03-03 19:15:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:06,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:07,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:07,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749324515] [2022-03-03 19:15:07,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749324515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:07,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400851473] [2022-03-03 19:15:07,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:15:07,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:07,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:07,034 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) [2022-03-03 19:15:07,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-03 19:15:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:07,400 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 183 treesize of output 159 [2022-03-03 19:15:08,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2022-03-03 19:15:08,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:08,032 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 206 treesize of output 178 [2022-03-03 19:15:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:08,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:08,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-03 19:15:08,870 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:08,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:15:08,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:15:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:08,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400851473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:08,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:08,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:08,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206532503] [2022-03-03 19:15:08,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:08,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:08,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:08,998 INFO L87 Difference]: Start difference. First operand 1047 states and 3516 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:10,053 INFO L93 Difference]: Finished difference Result 1712 states and 5459 transitions. [2022-03-03 19:15:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:15:10,053 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 [2022-03-03 19:15:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:10,056 INFO L225 Difference]: With dead ends: 1712 [2022-03-03 19:15:10,056 INFO L226 Difference]: Without dead ends: 1561 [2022-03-03 19:15:10,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:15:10,057 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 183 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:10,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 651 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1155 Invalid, 0 Unknown, 1133 Unchecked, 0.3s Time] [2022-03-03 19:15:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1561 states. [2022-03-03 19:15:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1561 to 1067. [2022-03-03 19:15:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.354596622889306) internal successors, (3576), 1066 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3576 transitions. [2022-03-03 19:15:10,072 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3576 transitions. Word has length 23 [2022-03-03 19:15:10,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:10,072 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3576 transitions. [2022-03-03 19:15:10,072 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) [2022-03-03 19:15:10,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3576 transitions. [2022-03-03 19:15:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:10,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:10,073 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] [2022-03-03 19:15:10,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:10,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-03 19:15:10,291 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1551787715, now seen corresponding path program 248 times [2022-03-03 19:15:10,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:10,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728585040] [2022-03-03 19:15:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:10,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:10,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:10,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728585040] [2022-03-03 19:15:10,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728585040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:10,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054427497] [2022-03-03 19:15:10,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:15:10,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:10,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:10,402 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) [2022-03-03 19:15:10,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-03 19:15:10,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:15:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:10,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:10,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:10,798 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 183 treesize of output 159 [2022-03-03 19:15:11,277 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 128 treesize of output 112 [2022-03-03 19:15:11,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:11,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:15:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:11,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:11,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-03 19:15:11,889 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 233 treesize of output 205 [2022-03-03 19:15:11,897 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:11,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 189 [2022-03-03 19:15:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:12,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054427497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:12,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:12,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:15:12,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874861043] [2022-03-03 19:15:12,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:12,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:15:12,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:15:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:15:12,050 INFO L87 Difference]: Start difference. First operand 1067 states and 3576 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:12,253 INFO L93 Difference]: Finished difference Result 1328 states and 4317 transitions. [2022-03-03 19:15:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:15:12,253 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 [2022-03-03 19:15:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:12,255 INFO L225 Difference]: With dead ends: 1328 [2022-03-03 19:15:12,255 INFO L226 Difference]: Without dead ends: 1274 [2022-03-03 19:15:12,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:15:12,256 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:12,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 229 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-03 19:15:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-03-03 19:15:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1090. [2022-03-03 19:15:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.3425160697887972) internal successors, (3640), 1089 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3640 transitions. [2022-03-03 19:15:12,268 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3640 transitions. Word has length 23 [2022-03-03 19:15:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:12,268 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 3640 transitions. [2022-03-03 19:15:12,268 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) [2022-03-03 19:15:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3640 transitions. [2022-03-03 19:15:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:12,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:12,269 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] [2022-03-03 19:15:12,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:12,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-03 19:15:12,477 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash 165612887, now seen corresponding path program 249 times [2022-03-03 19:15:12,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:12,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55571986] [2022-03-03 19:15:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:12,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:12,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:12,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55571986] [2022-03-03 19:15:12,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55571986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:12,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980422582] [2022-03-03 19:15:12,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:15:12,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:12,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:12,591 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) [2022-03-03 19:15:12,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-03 19:15:12,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:15:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:12,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:13,100 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 356 treesize of output 300 [2022-03-03 19:15:13,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:13,712 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 162 [2022-03-03 19:15:13,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:15:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:13,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:14,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:15:14,543 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 308 treesize of output 264 [2022-03-03 19:15:14,551 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:14,552 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 271 treesize of output 236 [2022-03-03 19:15:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:14,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980422582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:14,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:14,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:15:14,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462944570] [2022-03-03 19:15:14,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:14,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:15:14,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:15:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:15:14,705 INFO L87 Difference]: Start difference. First operand 1090 states and 3640 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:14,989 INFO L93 Difference]: Finished difference Result 1292 states and 4241 transitions. [2022-03-03 19:15:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:15:14,990 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 [2022-03-03 19:15:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:14,992 INFO L225 Difference]: With dead ends: 1292 [2022-03-03 19:15:14,992 INFO L226 Difference]: Without dead ends: 1249 [2022-03-03 19:15:14,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:14,992 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:14,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 620 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-03-03 19:15:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-03-03 19:15:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1090. [2022-03-03 19:15:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 3.3425160697887972) internal successors, (3640), 1089 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 3640 transitions. [2022-03-03 19:15:15,004 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 3640 transitions. Word has length 23 [2022-03-03 19:15:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:15,004 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 3640 transitions. [2022-03-03 19:15:15,004 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) [2022-03-03 19:15:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 3640 transitions. [2022-03-03 19:15:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:15,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:15,006 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] [2022-03-03 19:15:15,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:15,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-03 19:15:15,224 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1593676253, now seen corresponding path program 250 times [2022-03-03 19:15:15,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:15,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353872181] [2022-03-03 19:15:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:15,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:15,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353872181] [2022-03-03 19:15:15,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353872181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:15,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140042438] [2022-03-03 19:15:15,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:15:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:15,420 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) [2022-03-03 19:15:15,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-03 19:15:15,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:15:15,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:15,829 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 226 treesize of output 198 [2022-03-03 19:15:16,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:16,428 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 233 [2022-03-03 19:15:16,430 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 207 treesize of output 181 [2022-03-03 19:15:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:16,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:16,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-03-03 19:15:17,165 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 247 treesize of output 219 [2022-03-03 19:15:17,172 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:17,172 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 226 treesize of output 203 [2022-03-03 19:15:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:17,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140042438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:17,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:17,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:17,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572309875] [2022-03-03 19:15:17,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:17,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:17,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:17,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:17,319 INFO L87 Difference]: Start difference. First operand 1090 states and 3640 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:18,452 INFO L93 Difference]: Finished difference Result 1789 states and 5516 transitions. [2022-03-03 19:15:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:15:18,452 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 [2022-03-03 19:15:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:18,455 INFO L225 Difference]: With dead ends: 1789 [2022-03-03 19:15:18,455 INFO L226 Difference]: Without dead ends: 1599 [2022-03-03 19:15:18,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=2372, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:15:18,455 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 185 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:18,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 807 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1650 Invalid, 0 Unknown, 582 Unchecked, 0.4s Time] [2022-03-03 19:15:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-03-03 19:15:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1116. [2022-03-03 19:15:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 3.3309417040358746) internal successors, (3714), 1115 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:18,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3714 transitions. [2022-03-03 19:15:18,471 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3714 transitions. Word has length 23 [2022-03-03 19:15:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:18,471 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 3714 transitions. [2022-03-03 19:15:18,471 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) [2022-03-03 19:15:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3714 transitions. [2022-03-03 19:15:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:18,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:18,473 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] [2022-03-03 19:15:18,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:18,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-03 19:15:18,690 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash 93033907, now seen corresponding path program 251 times [2022-03-03 19:15:18,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:18,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192812188] [2022-03-03 19:15:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:18,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:18,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192812188] [2022-03-03 19:15:18,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192812188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:18,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038863595] [2022-03-03 19:15:18,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:15:18,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:18,815 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) [2022-03-03 19:15:18,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-03 19:15:19,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:15:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:15:19,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:19,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-03-03 19:15:19,860 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 145 treesize of output 125 [2022-03-03 19:15:19,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:19,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:15:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:20,367 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 314 treesize of output 276 [2022-03-03 19:15:20,898 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:20,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 291 [2022-03-03 19:15:20,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 251 [2022-03-03 19:15:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:21,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038863595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:21,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:21,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:21,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421625250] [2022-03-03 19:15:21,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:21,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:21,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:21,117 INFO L87 Difference]: Start difference. First operand 1116 states and 3714 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:23,666 INFO L93 Difference]: Finished difference Result 2916 states and 8992 transitions. [2022-03-03 19:15:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:15:23,667 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 [2022-03-03 19:15:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:23,671 INFO L225 Difference]: With dead ends: 2916 [2022-03-03 19:15:23,671 INFO L226 Difference]: Without dead ends: 2400 [2022-03-03 19:15:23,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=769, Invalid=6713, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:15:23,671 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 277 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 875 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1893 Invalid, 0 Unknown, 226 Unchecked, 0.6s Time] [2022-03-03 19:15:23,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-03-03 19:15:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1267. [2022-03-03 19:15:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.287519747235387) internal successors, (4162), 1266 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4162 transitions. [2022-03-03 19:15:23,690 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4162 transitions. Word has length 23 [2022-03-03 19:15:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:23,690 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4162 transitions. [2022-03-03 19:15:23,690 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) [2022-03-03 19:15:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4162 transitions. [2022-03-03 19:15:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:23,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:23,692 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] [2022-03-03 19:15:23,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-03 19:15:23,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:23,908 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1844539249, now seen corresponding path program 252 times [2022-03-03 19:15:23,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:23,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788999984] [2022-03-03 19:15:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:23,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:23,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:23,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788999984] [2022-03-03 19:15:23,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788999984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:23,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751470071] [2022-03-03 19:15:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:15:23,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:23,993 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) [2022-03-03 19:15:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-03 19:15:24,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:15:24,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:24,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:24,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 233 [2022-03-03 19:15:25,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:25,125 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 197 [2022-03-03 19:15:25,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 155 [2022-03-03 19:15:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:25,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:25,561 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 314 treesize of output 286 [2022-03-03 19:15:26,033 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 235 treesize of output 207 [2022-03-03 19:15:26,042 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:26,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 191 [2022-03-03 19:15:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:26,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751470071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:26,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:26,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:26,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679077296] [2022-03-03 19:15:26,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:26,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:26,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:26,224 INFO L87 Difference]: Start difference. First operand 1267 states and 4162 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:27,492 INFO L93 Difference]: Finished difference Result 2103 states and 6556 transitions. [2022-03-03 19:15:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:15:27,492 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 [2022-03-03 19:15:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:27,495 INFO L225 Difference]: With dead ends: 2103 [2022-03-03 19:15:27,495 INFO L226 Difference]: Without dead ends: 1971 [2022-03-03 19:15:27,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=2659, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:15:27,496 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 183 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:27,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 703 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1246 Invalid, 0 Unknown, 537 Unchecked, 0.5s Time] [2022-03-03 19:15:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-03-03 19:15:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1313. [2022-03-03 19:15:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 3.276676829268293) internal successors, (4299), 1312 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 4299 transitions. [2022-03-03 19:15:27,515 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 4299 transitions. Word has length 23 [2022-03-03 19:15:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:27,515 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 4299 transitions. [2022-03-03 19:15:27,515 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) [2022-03-03 19:15:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 4299 transitions. [2022-03-03 19:15:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:27,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:27,516 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] [2022-03-03 19:15:27,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:27,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-03 19:15:27,729 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1649274903, now seen corresponding path program 253 times [2022-03-03 19:15:27,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:27,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560704415] [2022-03-03 19:15:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:27,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:27,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560704415] [2022-03-03 19:15:27,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560704415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:27,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749557325] [2022-03-03 19:15:27,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:15:27,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:27,879 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) [2022-03-03 19:15:27,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-03 19:15:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:28,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:28,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:28,286 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 226 treesize of output 198 [2022-03-03 19:15:28,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:28,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:15:28,947 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 140 treesize of output 126 [2022-03-03 19:15:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:29,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:29,301 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 247 treesize of output 217 [2022-03-03 19:15:29,687 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:29,688 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 191 treesize of output 168 [2022-03-03 19:15:29,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:15:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:29,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749557325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:29,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:29,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:29,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712102200] [2022-03-03 19:15:29,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:29,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:29,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:29,828 INFO L87 Difference]: Start difference. First operand 1313 states and 4299 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:30,757 INFO L93 Difference]: Finished difference Result 1795 states and 5603 transitions. [2022-03-03 19:15:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:15:30,758 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 [2022-03-03 19:15:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:30,761 INFO L225 Difference]: With dead ends: 1795 [2022-03-03 19:15:30,761 INFO L226 Difference]: Without dead ends: 1717 [2022-03-03 19:15:30,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=2118, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:15:30,761 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:30,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 711 Invalid, 1942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1268 Invalid, 0 Unknown, 658 Unchecked, 0.4s Time] [2022-03-03 19:15:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-03-03 19:15:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1256. [2022-03-03 19:15:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.2916334661354583) internal successors, (4131), 1255 states have internal predecessors, (4131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4131 transitions. [2022-03-03 19:15:30,777 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4131 transitions. Word has length 23 [2022-03-03 19:15:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:30,777 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 4131 transitions. [2022-03-03 19:15:30,777 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) [2022-03-03 19:15:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4131 transitions. [2022-03-03 19:15:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:30,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:30,779 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] [2022-03-03 19:15:30,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-03 19:15:30,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:30,993 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:30,993 INFO L85 PathProgramCache]: Analyzing trace with hash -674292977, now seen corresponding path program 254 times [2022-03-03 19:15:30,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:30,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123193733] [2022-03-03 19:15:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:31,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:31,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123193733] [2022-03-03 19:15:31,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123193733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:31,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113733523] [2022-03-03 19:15:31,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:15:31,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:31,115 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) [2022-03-03 19:15:31,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-03 19:15:31,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:15:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:31,520 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 260 treesize of output 224 [2022-03-03 19:15:32,195 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 200 treesize of output 170 [2022-03-03 19:15:32,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:32,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-03 19:15:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:32,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:32,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-03 19:15:32,887 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 308 treesize of output 264 [2022-03-03 19:15:32,894 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:32,895 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 271 treesize of output 236 [2022-03-03 19:15:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:33,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113733523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:33,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:33,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:15:33,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366164437] [2022-03-03 19:15:33,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:33,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:15:33,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:15:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:15:33,063 INFO L87 Difference]: Start difference. First operand 1256 states and 4131 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:33,880 INFO L93 Difference]: Finished difference Result 1883 states and 5921 transitions. [2022-03-03 19:15:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:15:33,880 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 [2022-03-03 19:15:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:33,884 INFO L225 Difference]: With dead ends: 1883 [2022-03-03 19:15:33,884 INFO L226 Difference]: Without dead ends: 1752 [2022-03-03 19:15:33,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:15:33,884 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 198 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:33,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 588 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1275 Invalid, 0 Unknown, 615 Unchecked, 0.3s Time] [2022-03-03 19:15:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-03-03 19:15:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1267. [2022-03-03 19:15:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.2914691943127963) internal successors, (4167), 1266 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4167 transitions. [2022-03-03 19:15:33,901 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4167 transitions. Word has length 23 [2022-03-03 19:15:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:33,901 INFO L470 AbstractCegarLoop]: Abstraction has 1267 states and 4167 transitions. [2022-03-03 19:15:33,901 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) [2022-03-03 19:15:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4167 transitions. [2022-03-03 19:15:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:33,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:33,902 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] [2022-03-03 19:15:33,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:34,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:34,120 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1987599061, now seen corresponding path program 255 times [2022-03-03 19:15:34,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:34,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583799478] [2022-03-03 19:15:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:34,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:34,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583799478] [2022-03-03 19:15:34,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583799478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:34,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966219286] [2022-03-03 19:15:34,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:15:34,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:34,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:34,183 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) [2022-03-03 19:15:34,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-03 19:15:34,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:15:34,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:34,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 163 [2022-03-03 19:15:34,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:15:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:34,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-03 19:15:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:35,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:35,313 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 230 treesize of output 210 [2022-03-03 19:15:35,856 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:35,856 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 317 treesize of output 280 [2022-03-03 19:15:35,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 236 [2022-03-03 19:15:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:36,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966219286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:36,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:36,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:15:36,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653780383] [2022-03-03 19:15:36,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:36,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:15:36,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:15:36,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:15:36,075 INFO L87 Difference]: Start difference. First operand 1267 states and 4167 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:36,197 INFO L93 Difference]: Finished difference Result 1656 states and 5234 transitions. [2022-03-03 19:15:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:15:36,197 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 [2022-03-03 19:15:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:36,200 INFO L225 Difference]: With dead ends: 1656 [2022-03-03 19:15:36,200 INFO L226 Difference]: Without dead ends: 1637 [2022-03-03 19:15:36,200 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 [2022-03-03 19:15:36,200 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:36,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 198 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2022-03-03 19:15:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2022-03-03 19:15:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1333. [2022-03-03 19:15:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.2687687687687688) internal successors, (4354), 1332 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4354 transitions. [2022-03-03 19:15:36,216 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4354 transitions. Word has length 23 [2022-03-03 19:15:36,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:36,216 INFO L470 AbstractCegarLoop]: Abstraction has 1333 states and 4354 transitions. [2022-03-03 19:15:36,216 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) [2022-03-03 19:15:36,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4354 transitions. [2022-03-03 19:15:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:36,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:36,217 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] [2022-03-03 19:15:36,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:36,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:36,419 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:36,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1276997091, now seen corresponding path program 256 times [2022-03-03 19:15:36,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:36,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691078906] [2022-03-03 19:15:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:36,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:15:36,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:36,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691078906] [2022-03-03 19:15:36,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691078906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:36,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948088478] [2022-03-03 19:15:36,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:15:36,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:36,531 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) [2022-03-03 19:15:36,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-03 19:15:36,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:15:36,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:36,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:36,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:36,945 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 218 treesize of output 188 [2022-03-03 19:15:37,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:37,492 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-03 19:15:37,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-03 19:15:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:15:37,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:37,888 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 214 treesize of output 194 [2022-03-03 19:15:38,227 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 235 treesize of output 207 [2022-03-03 19:15:38,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:38,237 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 214 treesize of output 191 [2022-03-03 19:15:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:15:38,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948088478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:38,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:38,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 19:15:38,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771544691] [2022-03-03 19:15:38,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:38,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:15:38,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:38,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:15:38,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:15:38,461 INFO L87 Difference]: Start difference. First operand 1333 states and 4354 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:39,671 INFO L93 Difference]: Finished difference Result 2055 states and 6386 transitions. [2022-03-03 19:15:39,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:15:39,671 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 [2022-03-03 19:15:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:39,675 INFO L225 Difference]: With dead ends: 2055 [2022-03-03 19:15:39,675 INFO L226 Difference]: Without dead ends: 1998 [2022-03-03 19:15:39,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:15:39,675 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 163 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:39,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 682 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1471 Invalid, 0 Unknown, 448 Unchecked, 0.5s Time] [2022-03-03 19:15:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2022-03-03 19:15:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1326. [2022-03-03 19:15:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 3.2739622641509434) internal successors, (4338), 1325 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4338 transitions. [2022-03-03 19:15:39,692 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4338 transitions. Word has length 23 [2022-03-03 19:15:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:39,692 INFO L470 AbstractCegarLoop]: Abstraction has 1326 states and 4338 transitions. [2022-03-03 19:15:39,692 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) [2022-03-03 19:15:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4338 transitions. [2022-03-03 19:15:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:39,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:39,694 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] [2022-03-03 19:15:39,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-03 19:15:39,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:39,911 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1234605467, now seen corresponding path program 257 times [2022-03-03 19:15:39,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:39,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645311969] [2022-03-03 19:15:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:39,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:40,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:40,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645311969] [2022-03-03 19:15:40,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645311969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:40,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706231639] [2022-03-03 19:15:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:15:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:40,030 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) [2022-03-03 19:15:40,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-03 19:15:40,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:15:40,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:40,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:40,523 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 209 treesize of output 193 [2022-03-03 19:15:40,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:40,973 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 220 treesize of output 188 [2022-03-03 19:15:40,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-03-03 19:15:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:41,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:41,395 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 188 treesize of output 164 [2022-03-03 19:15:41,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:41,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 273 [2022-03-03 19:15:41,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-03-03 19:15:41,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:41,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706231639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:41,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:41,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:15:41,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272465443] [2022-03-03 19:15:41,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:41,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:15:41,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:15:41,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:15:41,993 INFO L87 Difference]: Start difference. First operand 1326 states and 4338 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:42,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:42,750 INFO L93 Difference]: Finished difference Result 1863 states and 6019 transitions. [2022-03-03 19:15:42,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:15:42,750 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 [2022-03-03 19:15:42,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:42,753 INFO L225 Difference]: With dead ends: 1863 [2022-03-03 19:15:42,753 INFO L226 Difference]: Without dead ends: 1724 [2022-03-03 19:15:42,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:15:42,754 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:42,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 557 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1058 Invalid, 0 Unknown, 243 Unchecked, 0.4s Time] [2022-03-03 19:15:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-03-03 19:15:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1374. [2022-03-03 19:15:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 3.2949745083758195) internal successors, (4524), 1373 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 4524 transitions. [2022-03-03 19:15:42,769 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 4524 transitions. Word has length 23 [2022-03-03 19:15:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:42,769 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 4524 transitions. [2022-03-03 19:15:42,769 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) [2022-03-03 19:15:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 4524 transitions. [2022-03-03 19:15:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:42,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:42,771 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] [2022-03-03 19:15:42,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-03 19:15:42,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-03-03 19:15:42,988 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 733952071, now seen corresponding path program 258 times [2022-03-03 19:15:42,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:42,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702800932] [2022-03-03 19:15:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:42,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:43,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:43,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702800932] [2022-03-03 19:15:43,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702800932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:43,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089813132] [2022-03-03 19:15:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:15:43,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:43,092 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) [2022-03-03 19:15:43,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-03 19:15:43,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:15:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:43,474 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 164 treesize of output 150 [2022-03-03 19:15:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:43,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 159 [2022-03-03 19:15:43,868 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 157 treesize of output 139 [2022-03-03 19:15:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:44,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:44,248 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 188 treesize of output 164 [2022-03-03 19:15:44,696 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:44,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 237 treesize of output 210 [2022-03-03 19:15:44,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:15:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:44,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089813132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:44,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:44,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:15:44,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041835417] [2022-03-03 19:15:44,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:44,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:15:44,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:15:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:15:44,799 INFO L87 Difference]: Start difference. First operand 1374 states and 4524 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:45,453 INFO L93 Difference]: Finished difference Result 1796 states and 5804 transitions. [2022-03-03 19:15:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:15:45,453 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 [2022-03-03 19:15:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:45,456 INFO L225 Difference]: With dead ends: 1796 [2022-03-03 19:15:45,456 INFO L226 Difference]: Without dead ends: 1705 [2022-03-03 19:15:45,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:15:45,456 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 77 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:45,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 572 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1237 Invalid, 0 Unknown, 191 Unchecked, 0.3s Time] [2022-03-03 19:15:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-03-03 19:15:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1379. [2022-03-03 19:15:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.298258345428157) internal successors, (4545), 1378 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4545 transitions. [2022-03-03 19:15:45,473 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4545 transitions. Word has length 23 [2022-03-03 19:15:45,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:45,473 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 4545 transitions. [2022-03-03 19:15:45,473 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) [2022-03-03 19:15:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4545 transitions. [2022-03-03 19:15:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:45,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:45,475 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] [2022-03-03 19:15:45,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:45,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-03 19:15:45,692 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1203625627, now seen corresponding path program 259 times [2022-03-03 19:15:45,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:45,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994514205] [2022-03-03 19:15:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:45,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:45,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:45,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994514205] [2022-03-03 19:15:45,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994514205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:45,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466662477] [2022-03-03 19:15:45,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:15:45,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:45,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:45,775 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) [2022-03-03 19:15:45,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-03 19:15:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:46,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:46,184 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 181 treesize of output 157 [2022-03-03 19:15:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:46,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 175 [2022-03-03 19:15:46,523 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 136 treesize of output 122 [2022-03-03 19:15:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:46,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:47,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-03-03 19:15:47,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 270 [2022-03-03 19:15:47,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:15:47,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 249 [2022-03-03 19:15:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:47,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466662477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:47,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:47,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:15:47,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973926547] [2022-03-03 19:15:47,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:47,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:15:47,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:15:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:15:47,658 INFO L87 Difference]: Start difference. First operand 1379 states and 4545 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:48,018 INFO L93 Difference]: Finished difference Result 1800 states and 5814 transitions. [2022-03-03 19:15:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:15:48,018 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 [2022-03-03 19:15:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:48,021 INFO L225 Difference]: With dead ends: 1800 [2022-03-03 19:15:48,021 INFO L226 Difference]: Without dead ends: 1726 [2022-03-03 19:15:48,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:15:48,021 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:48,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 249 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 725 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-03-03 19:15:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-03-03 19:15:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1386. [2022-03-03 19:15:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.3090252707581227) internal successors, (4583), 1385 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4583 transitions. [2022-03-03 19:15:48,038 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4583 transitions. Word has length 23 [2022-03-03 19:15:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:48,038 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 4583 transitions. [2022-03-03 19:15:48,038 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) [2022-03-03 19:15:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4583 transitions. [2022-03-03 19:15:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:48,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:48,040 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] [2022-03-03 19:15:48,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-03 19:15:48,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-03 19:15:48,251 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1068312533, now seen corresponding path program 260 times [2022-03-03 19:15:48,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:48,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497424885] [2022-03-03 19:15:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:48,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:48,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497424885] [2022-03-03 19:15:48,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497424885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:48,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833158213] [2022-03-03 19:15:48,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:15:48,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:48,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:48,420 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) [2022-03-03 19:15:48,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-03 19:15:48,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:15:48,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:48,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:15:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:49,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:15:49,323 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 140 treesize of output 126 [2022-03-03 19:15:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:49,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:49,569 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 171 treesize of output 151 [2022-03-03 19:15:49,886 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 312 treesize of output 268 [2022-03-03 19:15:49,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:15:49,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 251 [2022-03-03 19:15:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:50,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833158213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:50,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:50,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:50,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738325766] [2022-03-03 19:15:50,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:50,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:50,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:50,200 INFO L87 Difference]: Start difference. First operand 1386 states and 4583 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:52,249 INFO L93 Difference]: Finished difference Result 2034 states and 6352 transitions. [2022-03-03 19:15:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:15:52,249 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 [2022-03-03 19:15:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:52,253 INFO L225 Difference]: With dead ends: 2034 [2022-03-03 19:15:52,253 INFO L226 Difference]: Without dead ends: 1867 [2022-03-03 19:15:52,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:15:52,253 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 170 mSDsluCounter, 1451 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:52,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 692 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1377 Invalid, 0 Unknown, 449 Unchecked, 0.6s Time] [2022-03-03 19:15:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-03-03 19:15:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1351. [2022-03-03 19:15:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.2785185185185184) internal successors, (4426), 1350 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:52,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4426 transitions. [2022-03-03 19:15:52,271 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4426 transitions. Word has length 23 [2022-03-03 19:15:52,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:52,271 INFO L470 AbstractCegarLoop]: Abstraction has 1351 states and 4426 transitions. [2022-03-03 19:15:52,271 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) [2022-03-03 19:15:52,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4426 transitions. [2022-03-03 19:15:52,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:52,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:52,272 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] [2022-03-03 19:15:52,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-03 19:15:52,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:52,489 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1727972133, now seen corresponding path program 261 times [2022-03-03 19:15:52,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:52,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281900269] [2022-03-03 19:15:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:52,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:52,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:52,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281900269] [2022-03-03 19:15:52,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281900269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:52,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512516867] [2022-03-03 19:15:52,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:15:52,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:52,573 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) [2022-03-03 19:15:52,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-03 19:15:52,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:15:52,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:52,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-03 19:15:53,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:53,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 166 [2022-03-03 19:15:53,395 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 140 treesize of output 126 [2022-03-03 19:15:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:53,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:53,785 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 222 treesize of output 190 [2022-03-03 19:15:54,273 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 329 treesize of output 289 [2022-03-03 19:15:54,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:15:54,282 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 302 treesize of output 264 [2022-03-03 19:15:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:54,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512516867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:54,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:54,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:15:54,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778427602] [2022-03-03 19:15:54,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:54,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:15:54,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:15:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:15:54,603 INFO L87 Difference]: Start difference. First operand 1351 states and 4426 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:54,791 INFO L93 Difference]: Finished difference Result 1590 states and 5104 transitions. [2022-03-03 19:15:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:15:54,791 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 [2022-03-03 19:15:54,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:54,794 INFO L225 Difference]: With dead ends: 1590 [2022-03-03 19:15:54,794 INFO L226 Difference]: Without dead ends: 1528 [2022-03-03 19:15:54,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:15:54,794 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:54,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 206 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 510 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-03-03 19:15:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-03-03 19:15:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1345. [2022-03-03 19:15:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.2819940476190474) internal successors, (4411), 1344 states have internal predecessors, (4411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4411 transitions. [2022-03-03 19:15:54,810 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4411 transitions. Word has length 23 [2022-03-03 19:15:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:54,810 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4411 transitions. [2022-03-03 19:15:54,810 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) [2022-03-03 19:15:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4411 transitions. [2022-03-03 19:15:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:54,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:54,812 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] [2022-03-03 19:15:54,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-03 19:15:55,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-03 19:15:55,029 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:55,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1340709133, now seen corresponding path program 262 times [2022-03-03 19:15:55,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:55,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253598525] [2022-03-03 19:15:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:55,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:55,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253598525] [2022-03-03 19:15:55,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253598525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:55,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066755482] [2022-03-03 19:15:55,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:15:55,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:55,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:55,203 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) [2022-03-03 19:15:55,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-03 19:15:55,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:15:55,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:55,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:55,573 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 153 treesize of output 137 [2022-03-03 19:15:55,915 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 148 treesize of output 128 [2022-03-03 19:15:55,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:55,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-03 19:15:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:56,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:56,244 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 142 treesize of output 126 [2022-03-03 19:15:56,573 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 331 treesize of output 287 [2022-03-03 19:15:56,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:15:56,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 266 [2022-03-03 19:15:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:56,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066755482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:56,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:56,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:15:56,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340083983] [2022-03-03 19:15:56,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:56,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:15:56,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:15:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:15:56,807 INFO L87 Difference]: Start difference. First operand 1345 states and 4411 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:15:57,504 INFO L93 Difference]: Finished difference Result 1745 states and 5444 transitions. [2022-03-03 19:15:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:15:57,504 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 [2022-03-03 19:15:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:15:57,507 INFO L225 Difference]: With dead ends: 1745 [2022-03-03 19:15:57,507 INFO L226 Difference]: Without dead ends: 1638 [2022-03-03 19:15:57,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:15:57,508 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 111 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:15:57,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 553 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1179 Invalid, 0 Unknown, 178 Unchecked, 0.4s Time] [2022-03-03 19:15:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-03-03 19:15:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1384. [2022-03-03 19:15:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 3.274765003615329) internal successors, (4529), 1383 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:15:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 4529 transitions. [2022-03-03 19:15:57,533 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 4529 transitions. Word has length 23 [2022-03-03 19:15:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:15:57,533 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 4529 transitions. [2022-03-03 19:15:57,533 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) [2022-03-03 19:15:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 4529 transitions. [2022-03-03 19:15:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:15:57,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:15:57,535 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] [2022-03-03 19:15:57,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-03 19:15:57,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-03 19:15:57,735 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:15:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:15:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1691223081, now seen corresponding path program 263 times [2022-03-03 19:15:57,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:15:57,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518781646] [2022-03-03 19:15:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:15:57,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:15:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:15:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:15:57,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:15:57,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518781646] [2022-03-03 19:15:57,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518781646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:15:57,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409185223] [2022-03-03 19:15:57,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:15:57,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:15:57,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:15:57,897 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) [2022-03-03 19:15:57,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-03 19:15:58,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:15:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:15:58,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:15:58,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:15:58,270 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 136 treesize of output 120 [2022-03-03 19:15:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:15:58,689 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 240 [2022-03-03 19:15:58,693 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 238 treesize of output 208 [2022-03-03 19:15:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:58,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:15:59,150 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 310 treesize of output 270 [2022-03-03 19:15:59,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:15:59,557 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:15:59,558 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 172 treesize of output 153 [2022-03-03 19:15:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:15:59,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409185223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:15:59,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:15:59,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:15:59,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814590901] [2022-03-03 19:15:59,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:15:59,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:15:59,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:15:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:15:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:15:59,656 INFO L87 Difference]: Start difference. First operand 1384 states and 4529 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:00,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:00,956 INFO L93 Difference]: Finished difference Result 2227 states and 6953 transitions. [2022-03-03 19:16:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:16:00,957 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 [2022-03-03 19:16:00,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:00,961 INFO L225 Difference]: With dead ends: 2227 [2022-03-03 19:16:00,961 INFO L226 Difference]: Without dead ends: 2045 [2022-03-03 19:16:00,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=2657, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:16:00,961 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 123 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:00,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 672 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1255 Invalid, 0 Unknown, 274 Unchecked, 0.4s Time] [2022-03-03 19:16:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-03-03 19:16:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1461. [2022-03-03 19:16:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.2815068493150683) internal successors, (4791), 1460 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4791 transitions. [2022-03-03 19:16:00,981 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4791 transitions. Word has length 23 [2022-03-03 19:16:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:00,981 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 4791 transitions. [2022-03-03 19:16:00,981 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) [2022-03-03 19:16:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4791 transitions. [2022-03-03 19:16:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:00,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:00,983 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] [2022-03-03 19:16:01,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:01,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:01,198 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash 146976779, now seen corresponding path program 264 times [2022-03-03 19:16:01,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:01,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581085854] [2022-03-03 19:16:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:01,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:01,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:01,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581085854] [2022-03-03 19:16:01,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581085854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:01,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800887279] [2022-03-03 19:16:01,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:16:01,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:01,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:01,301 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) [2022-03-03 19:16:01,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-03 19:16:01,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:16:01,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:16:01,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:01,700 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 222 treesize of output 188 [2022-03-03 19:16:01,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:16:01,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:01,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-03 19:16:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:02,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:02,205 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 199 treesize of output 179 [2022-03-03 19:16:02,594 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:16:02,594 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 316 treesize of output 273 [2022-03-03 19:16:02,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2022-03-03 19:16:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:02,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800887279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:02,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:02,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:16:02,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175133171] [2022-03-03 19:16:02,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:02,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:02,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:02,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:02,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:02,738 INFO L87 Difference]: Start difference. First operand 1461 states and 4791 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:03,430 INFO L93 Difference]: Finished difference Result 2299 states and 7244 transitions. [2022-03-03 19:16:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:16:03,430 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 [2022-03-03 19:16:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:03,434 INFO L225 Difference]: With dead ends: 2299 [2022-03-03 19:16:03,434 INFO L226 Difference]: Without dead ends: 2144 [2022-03-03 19:16:03,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:16:03,434 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:03,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 628 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1251 Invalid, 0 Unknown, 406 Unchecked, 0.3s Time] [2022-03-03 19:16:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-03-03 19:16:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1524. [2022-03-03 19:16:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1523 states have (on average 3.2823374917925148) internal successors, (4999), 1523 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4999 transitions. [2022-03-03 19:16:03,454 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4999 transitions. Word has length 23 [2022-03-03 19:16:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:03,454 INFO L470 AbstractCegarLoop]: Abstraction has 1524 states and 4999 transitions. [2022-03-03 19:16:03,454 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) [2022-03-03 19:16:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4999 transitions. [2022-03-03 19:16:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:03,456 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:03,456 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] [2022-03-03 19:16:03,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:03,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-03 19:16:03,673 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2006278679, now seen corresponding path program 265 times [2022-03-03 19:16:03,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:03,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831176751] [2022-03-03 19:16:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:03,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:03,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:03,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:03,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831176751] [2022-03-03 19:16:03,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831176751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:03,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455656975] [2022-03-03 19:16:03,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:16:03,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:03,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:03,809 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) [2022-03-03 19:16:03,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-03 19:16:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:04,234 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 226 treesize of output 198 [2022-03-03 19:16:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:04,485 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 167 [2022-03-03 19:16:04,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:16:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:04,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:04,888 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 189 treesize of output 173 [2022-03-03 19:16:05,099 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 277 treesize of output 249 [2022-03-03 19:16:05,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:05,105 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 260 treesize of output 222 [2022-03-03 19:16:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:05,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455656975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:05,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:05,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:16:05,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373841857] [2022-03-03 19:16:05,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:05,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:16:05,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:16:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:16:05,339 INFO L87 Difference]: Start difference. First operand 1524 states and 4999 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:05,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:05,920 INFO L93 Difference]: Finished difference Result 2119 states and 6743 transitions. [2022-03-03 19:16:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:16:05,920 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 [2022-03-03 19:16:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:05,924 INFO L225 Difference]: With dead ends: 2119 [2022-03-03 19:16:05,924 INFO L226 Difference]: Without dead ends: 1968 [2022-03-03 19:16:05,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:16:05,924 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 230 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:05,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 314 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1090 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-03-03 19:16:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-03-03 19:16:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1503. [2022-03-03 19:16:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.2942743009320905) internal successors, (4948), 1502 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 4948 transitions. [2022-03-03 19:16:05,947 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 4948 transitions. Word has length 23 [2022-03-03 19:16:05,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:05,947 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 4948 transitions. [2022-03-03 19:16:05,947 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) [2022-03-03 19:16:05,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 4948 transitions. [2022-03-03 19:16:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:05,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:05,949 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] [2022-03-03 19:16:05,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:06,163 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1448587413, now seen corresponding path program 266 times [2022-03-03 19:16:06,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:06,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041785998] [2022-03-03 19:16:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:06,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:06,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:06,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041785998] [2022-03-03 19:16:06,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041785998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:06,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294092267] [2022-03-03 19:16:06,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:16:06,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:06,286 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) [2022-03-03 19:16:06,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-03 19:16:06,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:16:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:16:06,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:06,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-03-03 19:16:07,087 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 165 treesize of output 141 [2022-03-03 19:16:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:07,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:16:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:07,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:07,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-03 19:16:07,801 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 310 treesize of output 270 [2022-03-03 19:16:07,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:07,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 253 [2022-03-03 19:16:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:08,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294092267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:08,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:08,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:16:08,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931675499] [2022-03-03 19:16:08,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:08,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:08,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:08,021 INFO L87 Difference]: Start difference. First operand 1503 states and 4948 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:08,460 INFO L93 Difference]: Finished difference Result 2025 states and 6415 transitions. [2022-03-03 19:16:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:16:08,460 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 [2022-03-03 19:16:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:08,463 INFO L225 Difference]: With dead ends: 2025 [2022-03-03 19:16:08,463 INFO L226 Difference]: Without dead ends: 1828 [2022-03-03 19:16:08,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:16:08,463 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 129 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:08,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 510 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1216 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-03-03 19:16:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2022-03-03 19:16:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1552. [2022-03-03 19:16:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.3120567375886525) internal successors, (5137), 1551 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5137 transitions. [2022-03-03 19:16:08,481 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5137 transitions. Word has length 23 [2022-03-03 19:16:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:08,482 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5137 transitions. [2022-03-03 19:16:08,482 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) [2022-03-03 19:16:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5137 transitions. [2022-03-03 19:16:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:08,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:08,483 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] [2022-03-03 19:16:08,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-03 19:16:08,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:08,697 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2083891563, now seen corresponding path program 267 times [2022-03-03 19:16:08,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:08,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165560847] [2022-03-03 19:16:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:08,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:08,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165560847] [2022-03-03 19:16:08,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165560847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:08,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834966037] [2022-03-03 19:16:08,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:16:08,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:08,771 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) [2022-03-03 19:16:08,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-03 19:16:09,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:16:09,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:09,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:09,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 184 [2022-03-03 19:16:09,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-03 19:16:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:09,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:16:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:09,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:09,672 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 199 treesize of output 179 [2022-03-03 19:16:10,075 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:16:10,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 275 [2022-03-03 19:16:10,082 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 [2022-03-03 19:16:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:10,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834966037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:10,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:10,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:16:10,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021353773] [2022-03-03 19:16:10,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:10,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:16:10,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:16:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:16:10,216 INFO L87 Difference]: Start difference. First operand 1552 states and 5137 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:11,135 INFO L93 Difference]: Finished difference Result 2203 states and 7053 transitions. [2022-03-03 19:16:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:16:11,135 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 [2022-03-03 19:16:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:11,139 INFO L225 Difference]: With dead ends: 2203 [2022-03-03 19:16:11,139 INFO L226 Difference]: Without dead ends: 2061 [2022-03-03 19:16:11,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:16:11,139 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 113 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:11,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 544 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 987 Invalid, 0 Unknown, 326 Unchecked, 0.4s Time] [2022-03-03 19:16:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-03-03 19:16:11,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1603. [2022-03-03 19:16:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.309612983770287) internal successors, (5302), 1602 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5302 transitions. [2022-03-03 19:16:11,159 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5302 transitions. Word has length 23 [2022-03-03 19:16:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:11,159 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 5302 transitions. [2022-03-03 19:16:11,159 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) [2022-03-03 19:16:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5302 transitions. [2022-03-03 19:16:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:11,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:11,161 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] [2022-03-03 19:16:11,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:11,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-03-03 19:16:11,375 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:11,375 INFO L85 PathProgramCache]: Analyzing trace with hash 958155809, now seen corresponding path program 268 times [2022-03-03 19:16:11,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:11,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459422300] [2022-03-03 19:16:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:11,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:11,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:11,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459422300] [2022-03-03 19:16:11,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459422300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:11,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526818830] [2022-03-03 19:16:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:16:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:11,467 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) [2022-03-03 19:16:11,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-03 19:16:11,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:16:11,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:11,905 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 222 treesize of output 188 [2022-03-03 19:16:12,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:16:12,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:12,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:16:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:12,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:12,543 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 199 treesize of output 179 [2022-03-03 19:16:12,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:12,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 247 [2022-03-03 19:16:12,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 181 [2022-03-03 19:16:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:13,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526818830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:13,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:13,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:16:13,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737296417] [2022-03-03 19:16:13,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:13,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:16:13,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:16:13,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:16:13,055 INFO L87 Difference]: Start difference. First operand 1603 states and 5302 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:14,248 INFO L93 Difference]: Finished difference Result 2151 states and 6988 transitions. [2022-03-03 19:16:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:16:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:14,251 INFO L225 Difference]: With dead ends: 2151 [2022-03-03 19:16:14,251 INFO L226 Difference]: Without dead ends: 2010 [2022-03-03 19:16:14,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=2745, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:16:14,252 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 142 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:14,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 542 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1750 Invalid, 0 Unknown, 172 Unchecked, 0.5s Time] [2022-03-03 19:16:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-03-03 19:16:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1640. [2022-03-03 19:16:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.325198291641245) internal successors, (5450), 1639 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5450 transitions. [2022-03-03 19:16:14,272 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5450 transitions. Word has length 23 [2022-03-03 19:16:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:14,272 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 5450 transitions. [2022-03-03 19:16:14,272 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) [2022-03-03 19:16:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5450 transitions. [2022-03-03 19:16:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:14,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:14,274 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] [2022-03-03 19:16:14,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-03 19:16:14,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-03-03 19:16:14,487 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -324990303, now seen corresponding path program 269 times [2022-03-03 19:16:14,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:14,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62466594] [2022-03-03 19:16:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:14,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:14,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62466594] [2022-03-03 19:16:14,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62466594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:14,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133804918] [2022-03-03 19:16:14,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:16:14,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:14,597 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) [2022-03-03 19:16:14,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-03 19:16:14,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:16:14,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:14,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:15,020 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 156 treesize of output 136 [2022-03-03 19:16:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:15,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:16:15,237 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 151 treesize of output 133 [2022-03-03 19:16:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:15,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:15,596 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 159 treesize of output 139 [2022-03-03 19:16:16,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:16,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 291 [2022-03-03 19:16:16,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 223 [2022-03-03 19:16:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:16,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133804918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:16,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:16,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:16:16,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056943143] [2022-03-03 19:16:16,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:16,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:16:16,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:16,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:16:16,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:16:16,267 INFO L87 Difference]: Start difference. First operand 1640 states and 5450 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:18,236 INFO L93 Difference]: Finished difference Result 2213 states and 7056 transitions. [2022-03-03 19:16:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:16:18,237 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 [2022-03-03 19:16:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:18,240 INFO L225 Difference]: With dead ends: 2213 [2022-03-03 19:16:18,240 INFO L226 Difference]: Without dead ends: 2113 [2022-03-03 19:16:18,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:16:18,240 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 180 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:18,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 610 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1356 Invalid, 0 Unknown, 156 Unchecked, 0.5s Time] [2022-03-03 19:16:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2022-03-03 19:16:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1634. [2022-03-03 19:16:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.333741579914268) internal successors, (5444), 1633 states have internal predecessors, (5444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5444 transitions. [2022-03-03 19:16:18,259 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5444 transitions. Word has length 23 [2022-03-03 19:16:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 5444 transitions. [2022-03-03 19:16:18,259 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) [2022-03-03 19:16:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5444 transitions. [2022-03-03 19:16:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:18,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:18,261 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] [2022-03-03 19:16:18,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:18,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:18,478 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2032399295, now seen corresponding path program 270 times [2022-03-03 19:16:18,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:18,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050493346] [2022-03-03 19:16:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:18,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:18,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050493346] [2022-03-03 19:16:18,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050493346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:18,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491390908] [2022-03-03 19:16:18,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:16:18,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:18,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:18,573 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) [2022-03-03 19:16:18,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-03 19:16:18,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:16:18,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:16:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:18,950 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 164 treesize of output 150 [2022-03-03 19:16:19,067 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 181 treesize of output 155 [2022-03-03 19:16:19,071 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 153 treesize of output 135 [2022-03-03 19:16:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:19,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:19,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-03 19:16:20,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:20,112 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 295 treesize of output 265 [2022-03-03 19:16:20,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 198 [2022-03-03 19:16:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:20,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491390908] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:20,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:20,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-03 19:16:20,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283985912] [2022-03-03 19:16:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:20,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:20,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:20,425 INFO L87 Difference]: Start difference. First operand 1634 states and 5444 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:23,005 INFO L93 Difference]: Finished difference Result 3257 states and 10137 transitions. [2022-03-03 19:16:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:16:23,005 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 [2022-03-03 19:16:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:23,010 INFO L225 Difference]: With dead ends: 3257 [2022-03-03 19:16:23,010 INFO L226 Difference]: Without dead ends: 2911 [2022-03-03 19:16:23,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=389, Invalid=3643, Unknown=0, NotChecked=0, Total=4032 [2022-03-03 19:16:23,010 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 212 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 3978 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:23,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1141 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3978 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:16:23,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2022-03-03 19:16:23,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1683. [2022-03-03 19:16:23,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3644470868014267) internal successors, (5659), 1682 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5659 transitions. [2022-03-03 19:16:23,036 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5659 transitions. Word has length 23 [2022-03-03 19:16:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:23,036 INFO L470 AbstractCegarLoop]: Abstraction has 1683 states and 5659 transitions. [2022-03-03 19:16:23,036 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) [2022-03-03 19:16:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5659 transitions. [2022-03-03 19:16:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:23,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:23,038 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] [2022-03-03 19:16:23,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-03 19:16:23,255 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1130084337, now seen corresponding path program 271 times [2022-03-03 19:16:23,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:23,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402391269] [2022-03-03 19:16:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:23,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:23,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402391269] [2022-03-03 19:16:23,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402391269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:23,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146613349] [2022-03-03 19:16:23,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:16:23,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:23,365 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) [2022-03-03 19:16:23,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-03 19:16:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:23,765 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 173 treesize of output 155 [2022-03-03 19:16:24,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:24,333 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 272 [2022-03-03 19:16:24,337 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 246 treesize of output 222 [2022-03-03 19:16:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:24,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:24,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2022-03-03 19:16:25,167 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 277 treesize of output 249 [2022-03-03 19:16:25,175 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:25,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 260 treesize of output 222 [2022-03-03 19:16:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:25,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146613349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:25,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:25,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-03 19:16:25,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540325161] [2022-03-03 19:16:25,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:25,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:25,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:25,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:25,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:25,397 INFO L87 Difference]: Start difference. First operand 1683 states and 5659 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:26,788 INFO L93 Difference]: Finished difference Result 2540 states and 8128 transitions. [2022-03-03 19:16:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:16:26,788 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 [2022-03-03 19:16:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:26,793 INFO L225 Difference]: With dead ends: 2540 [2022-03-03 19:16:26,793 INFO L226 Difference]: Without dead ends: 2310 [2022-03-03 19:16:26,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=2674, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:16:26,794 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 197 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:26,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 677 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1717 Invalid, 0 Unknown, 403 Unchecked, 0.6s Time] [2022-03-03 19:16:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-03-03 19:16:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1687. [2022-03-03 19:16:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.3499406880189797) internal successors, (5648), 1686 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5648 transitions. [2022-03-03 19:16:26,817 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5648 transitions. Word has length 23 [2022-03-03 19:16:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:26,817 INFO L470 AbstractCegarLoop]: Abstraction has 1687 states and 5648 transitions. [2022-03-03 19:16:26,818 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) [2022-03-03 19:16:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5648 transitions. [2022-03-03 19:16:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:26,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:26,820 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] [2022-03-03 19:16:26,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:27,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-03 19:16:27,037 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:27,037 INFO L85 PathProgramCache]: Analyzing trace with hash -368810315, now seen corresponding path program 272 times [2022-03-03 19:16:27,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:27,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068662877] [2022-03-03 19:16:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:27,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:27,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:27,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068662877] [2022-03-03 19:16:27,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068662877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:27,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013916548] [2022-03-03 19:16:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:16:27,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:27,131 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) [2022-03-03 19:16:27,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-03 19:16:27,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:16:27,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:27,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:27,533 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 173 treesize of output 149 [2022-03-03 19:16:27,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 227 [2022-03-03 19:16:27,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:27,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 228 [2022-03-03 19:16:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:28,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:28,361 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 216 treesize of output 196 [2022-03-03 19:16:28,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:28,595 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 254 treesize of output 232 [2022-03-03 19:16:28,599 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 223 treesize of output 199 [2022-03-03 19:16:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:28,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013916548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:28,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:28,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-03 19:16:28,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12213179] [2022-03-03 19:16:28,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:28,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:16:28,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:28,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:16:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:16:28,816 INFO L87 Difference]: Start difference. First operand 1687 states and 5648 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:29,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:29,390 INFO L93 Difference]: Finished difference Result 2724 states and 8989 transitions. [2022-03-03 19:16:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:16:29,390 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:29,395 INFO L225 Difference]: With dead ends: 2724 [2022-03-03 19:16:29,395 INFO L226 Difference]: Without dead ends: 2600 [2022-03-03 19:16:29,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:16:29,395 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 189 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:29,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 315 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1048 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-03-03 19:16:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2022-03-03 19:16:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1832. [2022-03-03 19:16:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.442381212452212) internal successors, (6303), 1831 states have internal predecessors, (6303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 6303 transitions. [2022-03-03 19:16:29,420 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 6303 transitions. Word has length 23 [2022-03-03 19:16:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 6303 transitions. [2022-03-03 19:16:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 6303 transitions. [2022-03-03 19:16:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:29,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:29,423 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] [2022-03-03 19:16:29,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:29,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:29,640 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash -960967623, now seen corresponding path program 273 times [2022-03-03 19:16:29,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:29,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997173754] [2022-03-03 19:16:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:29,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:29,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:29,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997173754] [2022-03-03 19:16:29,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997173754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:29,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33453502] [2022-03-03 19:16:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:16:29,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:29,779 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) [2022-03-03 19:16:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-03 19:16:29,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:16:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:16:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:30,102 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 145 treesize of output 125 [2022-03-03 19:16:30,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:30,316 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 175 [2022-03-03 19:16:30,319 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 161 treesize of output 143 [2022-03-03 19:16:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:30,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:31,022 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 314 treesize of output 276 [2022-03-03 19:16:31,390 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 159 treesize of output 139 [2022-03-03 19:16:31,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:31,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 146 [2022-03-03 19:16:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:31,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33453502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:31,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:31,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:16:31,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344379703] [2022-03-03 19:16:31,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:31,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:16:31,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:16:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:16:31,688 INFO L87 Difference]: Start difference. First operand 1832 states and 6303 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:33,616 INFO L93 Difference]: Finished difference Result 4195 states and 12886 transitions. [2022-03-03 19:16:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:16:33,616 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 [2022-03-03 19:16:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:33,624 INFO L225 Difference]: With dead ends: 4195 [2022-03-03 19:16:33,624 INFO L226 Difference]: Without dead ends: 3983 [2022-03-03 19:16:33,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=551, Invalid=3739, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:16:33,624 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 502 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:33,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 624 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1997 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:16:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3983 states. [2022-03-03 19:16:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3983 to 1868. [2022-03-03 19:16:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.468130690948045) internal successors, (6475), 1867 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:33,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6475 transitions. [2022-03-03 19:16:33,666 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6475 transitions. Word has length 23 [2022-03-03 19:16:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:33,666 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 6475 transitions. [2022-03-03 19:16:33,666 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) [2022-03-03 19:16:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6475 transitions. [2022-03-03 19:16:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:33,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:33,669 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] [2022-03-03 19:16:33,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-03 19:16:33,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:33,883 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1003705529, now seen corresponding path program 274 times [2022-03-03 19:16:33,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:33,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780825601] [2022-03-03 19:16:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:33,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:34,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:34,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780825601] [2022-03-03 19:16:34,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780825601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:34,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018578820] [2022-03-03 19:16:34,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:16:34,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:34,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:34,025 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) [2022-03-03 19:16:34,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-03 19:16:34,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:16:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:34,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-03 19:16:34,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:34,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 344 treesize of output 286 [2022-03-03 19:16:34,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 238 [2022-03-03 19:16:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:35,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:35,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 263 [2022-03-03 19:16:35,735 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 159 treesize of output 139 [2022-03-03 19:16:35,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:35,741 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 150 treesize of output 140 [2022-03-03 19:16:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:36,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018578820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:36,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:36,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-03-03 19:16:36,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045709451] [2022-03-03 19:16:36,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:36,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:16:36,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:16:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:16:36,034 INFO L87 Difference]: Start difference. First operand 1868 states and 6475 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:36,702 INFO L93 Difference]: Finished difference Result 2783 states and 9075 transitions. [2022-03-03 19:16:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:16:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:36,707 INFO L225 Difference]: With dead ends: 2783 [2022-03-03 19:16:36,707 INFO L226 Difference]: Without dead ends: 2663 [2022-03-03 19:16:36,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:16:36,708 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 146 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:36,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 301 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:16:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2022-03-03 19:16:36,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1910. [2022-03-03 19:16:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 3.471974855945521) internal successors, (6628), 1909 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 6628 transitions. [2022-03-03 19:16:36,735 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 6628 transitions. Word has length 23 [2022-03-03 19:16:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:36,735 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 6628 transitions. [2022-03-03 19:16:36,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 6628 transitions. [2022-03-03 19:16:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:36,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:36,737 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] [2022-03-03 19:16:36,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-03 19:16:36,954 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1976313859, now seen corresponding path program 275 times [2022-03-03 19:16:36,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:36,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444565141] [2022-03-03 19:16:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:37,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:37,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444565141] [2022-03-03 19:16:37,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444565141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:37,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962861002] [2022-03-03 19:16:37,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:16:37,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:37,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:37,030 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) [2022-03-03 19:16:37,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-03 19:16:37,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:16:37,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:37,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:37,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 136 [2022-03-03 19:16:37,834 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 145 treesize of output 125 [2022-03-03 19:16:37,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:37,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-03 19:16:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:38,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:38,208 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 275 treesize of output 235 [2022-03-03 19:16:38,611 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 142 treesize of output 126 [2022-03-03 19:16:38,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:16:38,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 132 [2022-03-03 19:16:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:38,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962861002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:38,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:38,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:16:38,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90525631] [2022-03-03 19:16:38,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:38,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:16:38,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:16:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:16:38,693 INFO L87 Difference]: Start difference. First operand 1910 states and 6628 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:39,470 INFO L93 Difference]: Finished difference Result 2776 states and 9171 transitions. [2022-03-03 19:16:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:16:39,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:39,475 INFO L225 Difference]: With dead ends: 2776 [2022-03-03 19:16:39,475 INFO L226 Difference]: Without dead ends: 2593 [2022-03-03 19:16:39,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:16:39,476 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 114 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:39,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 525 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1009 Invalid, 0 Unknown, 644 Unchecked, 0.4s Time] [2022-03-03 19:16:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-03-03 19:16:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 1899. [2022-03-03 19:16:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 3.464172813487882) internal successors, (6575), 1898 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 6575 transitions. [2022-03-03 19:16:39,500 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 6575 transitions. Word has length 23 [2022-03-03 19:16:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:39,500 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 6575 transitions. [2022-03-03 19:16:39,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 6575 transitions. [2022-03-03 19:16:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:39,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:39,503 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] [2022-03-03 19:16:39,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:39,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:39,716 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2127127851, now seen corresponding path program 276 times [2022-03-03 19:16:39,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:39,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279706420] [2022-03-03 19:16:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:39,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:39,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279706420] [2022-03-03 19:16:39,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279706420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:39,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728576538] [2022-03-03 19:16:39,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:16:39,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:39,854 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) [2022-03-03 19:16:39,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-03 19:16:40,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:16:40,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:40,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:16:40,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:40,278 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 231 treesize of output 197 [2022-03-03 19:16:40,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:40,816 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 161 [2022-03-03 19:16:40,819 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 153 treesize of output 135 [2022-03-03 19:16:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:41,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:41,175 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 188 treesize of output 164 [2022-03-03 19:16:41,519 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:16:41,519 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 251 treesize of output 224 [2022-03-03 19:16:41,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:16:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:41,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728576538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:41,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:41,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-03 19:16:41,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642198803] [2022-03-03 19:16:41,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:41,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:41,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:41,696 INFO L87 Difference]: Start difference. First operand 1899 states and 6575 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:42,162 INFO L93 Difference]: Finished difference Result 2643 states and 8910 transitions. [2022-03-03 19:16:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:16:42,162 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 [2022-03-03 19:16:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:42,166 INFO L225 Difference]: With dead ends: 2643 [2022-03-03 19:16:42,167 INFO L226 Difference]: Without dead ends: 2626 [2022-03-03 19:16:42,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:16:42,167 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 173 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:42,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 355 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 613 Invalid, 0 Unknown, 592 Unchecked, 0.2s Time] [2022-03-03 19:16:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2022-03-03 19:16:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1897. [2022-03-03 19:16:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.4593881856540083) internal successors, (6559), 1896 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6559 transitions. [2022-03-03 19:16:42,193 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6559 transitions. Word has length 23 [2022-03-03 19:16:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:42,194 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 6559 transitions. [2022-03-03 19:16:42,194 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) [2022-03-03 19:16:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6559 transitions. [2022-03-03 19:16:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:42,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:42,196 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] [2022-03-03 19:16:42,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:42,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:42,412 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:42,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1844290479, now seen corresponding path program 277 times [2022-03-03 19:16:42,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:42,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856515722] [2022-03-03 19:16:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:42,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856515722] [2022-03-03 19:16:42,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856515722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266039619] [2022-03-03 19:16:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:16:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:42,518 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) [2022-03-03 19:16:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-03 19:16:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:42,915 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 181 treesize of output 157 [2022-03-03 19:16:43,236 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 208 treesize of output 174 [2022-03-03 19:16:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:43,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-03-03 19:16:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:43,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:43,660 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 291 treesize of output 259 [2022-03-03 19:16:43,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:16:43,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:43,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:16:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:44,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266039619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:44,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:44,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:16:44,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275155130] [2022-03-03 19:16:44,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:44,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:16:44,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:16:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:16:44,063 INFO L87 Difference]: Start difference. First operand 1897 states and 6559 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:44,211 INFO L93 Difference]: Finished difference Result 2139 states and 7223 transitions. [2022-03-03 19:16:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-03 19:16:44,211 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 [2022-03-03 19:16:44,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:44,215 INFO L225 Difference]: With dead ends: 2139 [2022-03-03 19:16:44,215 INFO L226 Difference]: Without dead ends: 2079 [2022-03-03 19:16:44,215 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 [2022-03-03 19:16:44,215 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:44,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 229 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 511 Invalid, 0 Unknown, 328 Unchecked, 0.1s Time] [2022-03-03 19:16:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-03-03 19:16:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1879. [2022-03-03 19:16:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.4696485623003195) internal successors, (6516), 1878 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6516 transitions. [2022-03-03 19:16:44,238 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6516 transitions. Word has length 23 [2022-03-03 19:16:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:44,239 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 6516 transitions. [2022-03-03 19:16:44,239 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) [2022-03-03 19:16:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6516 transitions. [2022-03-03 19:16:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:44,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:44,241 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] [2022-03-03 19:16:44,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-03 19:16:44,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:44,454 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1633248171, now seen corresponding path program 278 times [2022-03-03 19:16:44,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:44,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644735536] [2022-03-03 19:16:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:44,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:44,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644735536] [2022-03-03 19:16:44,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644735536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:44,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281547765] [2022-03-03 19:16:44,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:16:44,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:44,632 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) [2022-03-03 19:16:44,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-03 19:16:44,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:16:44,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:44,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:45,086 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 226 treesize of output 198 [2022-03-03 19:16:45,362 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 128 treesize of output 112 [2022-03-03 19:16:45,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:45,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 134 [2022-03-03 19:16:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:45,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:45,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 241 treesize of output 209 [2022-03-03 19:16:46,233 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 310 treesize of output 266 [2022-03-03 19:16:46,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:46,240 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 279 treesize of output 249 [2022-03-03 19:16:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:46,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281547765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:46,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:46,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:16:46,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630961068] [2022-03-03 19:16:46,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:46,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:16:46,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:16:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:16:46,446 INFO L87 Difference]: Start difference. First operand 1879 states and 6516 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:47,554 INFO L93 Difference]: Finished difference Result 2988 states and 9860 transitions. [2022-03-03 19:16:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:16:47,554 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 [2022-03-03 19:16:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:47,559 INFO L225 Difference]: With dead ends: 2988 [2022-03-03 19:16:47,559 INFO L226 Difference]: Without dead ends: 2755 [2022-03-03 19:16:47,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:16:47,559 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 259 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:47,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 417 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1195 Invalid, 0 Unknown, 205 Unchecked, 0.4s Time] [2022-03-03 19:16:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-03-03 19:16:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1980. [2022-03-03 19:16:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.5073269327943404) internal successors, (6941), 1979 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6941 transitions. [2022-03-03 19:16:47,589 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6941 transitions. Word has length 23 [2022-03-03 19:16:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:47,589 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6941 transitions. [2022-03-03 19:16:47,589 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) [2022-03-03 19:16:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6941 transitions. [2022-03-03 19:16:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:47,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:47,592 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] [2022-03-03 19:16:47,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-03 19:16:47,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2022-03-03 19:16:47,807 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:47,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:47,808 INFO L85 PathProgramCache]: Analyzing trace with hash -216166955, now seen corresponding path program 279 times [2022-03-03 19:16:47,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:47,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571496344] [2022-03-03 19:16:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:47,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:47,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571496344] [2022-03-03 19:16:47,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571496344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:47,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323362871] [2022-03-03 19:16:47,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:16:47,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:47,972 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) [2022-03-03 19:16:47,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-03 19:16:48,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:16:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:48,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:48,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:48,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 120 [2022-03-03 19:16:48,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 141 [2022-03-03 19:16:48,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:48,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:16:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:48,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:48,991 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 159 treesize of output 139 [2022-03-03 19:16:49,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 257 [2022-03-03 19:16:49,540 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:16:49,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 239 [2022-03-03 19:16:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:49,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323362871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:49,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:49,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-03 19:16:49,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022046464] [2022-03-03 19:16:49,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:49,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:49,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:49,748 INFO L87 Difference]: Start difference. First operand 1980 states and 6941 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:51,178 INFO L93 Difference]: Finished difference Result 2696 states and 9229 transitions. [2022-03-03 19:16:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:16:51,178 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 [2022-03-03 19:16:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:51,183 INFO L225 Difference]: With dead ends: 2696 [2022-03-03 19:16:51,183 INFO L226 Difference]: Without dead ends: 2598 [2022-03-03 19:16:51,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=2241, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:16:51,184 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:51,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 598 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1278 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-03-03 19:16:51,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2022-03-03 19:16:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2008. [2022-03-03 19:16:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5226706527154956) internal successors, (7070), 2007 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7070 transitions. [2022-03-03 19:16:51,211 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7070 transitions. Word has length 23 [2022-03-03 19:16:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:51,211 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7070 transitions. [2022-03-03 19:16:51,211 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) [2022-03-03 19:16:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7070 transitions. [2022-03-03 19:16:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:51,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:51,214 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] [2022-03-03 19:16:51,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:51,432 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2141222643, now seen corresponding path program 280 times [2022-03-03 19:16:51,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:51,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067562937] [2022-03-03 19:16:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:51,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:51,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:51,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067562937] [2022-03-03 19:16:51,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067562937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:51,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841095292] [2022-03-03 19:16:51,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:16:51,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:51,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:51,634 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) [2022-03-03 19:16:51,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-03 19:16:51,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:16:51,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:51,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:52,014 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 156 treesize of output 136 [2022-03-03 19:16:52,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:52,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 240 [2022-03-03 19:16:52,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 208 [2022-03-03 19:16:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:52,771 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 159 treesize of output 139 [2022-03-03 19:16:53,142 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:16:53,142 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 314 treesize of output 267 [2022-03-03 19:16:53,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 221 [2022-03-03 19:16:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:53,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841095292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:53,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:53,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:16:53,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88057983] [2022-03-03 19:16:53,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:53,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:16:53,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:16:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:16:53,247 INFO L87 Difference]: Start difference. First operand 2008 states and 7070 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:53,842 INFO L93 Difference]: Finished difference Result 2805 states and 9744 transitions. [2022-03-03 19:16:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:16:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:53,849 INFO L225 Difference]: With dead ends: 2805 [2022-03-03 19:16:53,849 INFO L226 Difference]: Without dead ends: 2757 [2022-03-03 19:16:53,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:16:53,849 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 203 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:53,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 308 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 501 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-03-03 19:16:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2022-03-03 19:16:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2008. [2022-03-03 19:16:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.521674140508221) internal successors, (7068), 2007 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7068 transitions. [2022-03-03 19:16:53,880 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7068 transitions. Word has length 23 [2022-03-03 19:16:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:53,880 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7068 transitions. [2022-03-03 19:16:53,880 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) [2022-03-03 19:16:53,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7068 transitions. [2022-03-03 19:16:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:53,883 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:53,883 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] [2022-03-03 19:16:53,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:54,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-03 19:16:54,093 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash -997922667, now seen corresponding path program 281 times [2022-03-03 19:16:54,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:54,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044405684] [2022-03-03 19:16:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:16:54,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:54,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044405684] [2022-03-03 19:16:54,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044405684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:54,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203416850] [2022-03-03 19:16:54,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:16:54,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:54,232 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) [2022-03-03 19:16:54,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-03 19:16:54,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:16:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:54,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:54,683 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 218 treesize of output 188 [2022-03-03 19:16:55,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:55,015 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 231 treesize of output 199 [2022-03-03 19:16:55,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 157 [2022-03-03 19:16:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:55,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:55,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 190 [2022-03-03 19:16:55,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:16:55,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:55,625 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 232 treesize of output 214 [2022-03-03 19:16:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:55,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203416850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:55,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:55,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:16:55,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054238668] [2022-03-03 19:16:55,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:55,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:16:55,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:55,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:16:55,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:16:55,801 INFO L87 Difference]: Start difference. First operand 2008 states and 7068 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:56,347 INFO L93 Difference]: Finished difference Result 2669 states and 8887 transitions. [2022-03-03 19:16:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:16:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:56,352 INFO L225 Difference]: With dead ends: 2669 [2022-03-03 19:16:56,352 INFO L226 Difference]: Without dead ends: 2518 [2022-03-03 19:16:56,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:16:56,352 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 205 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:56,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 340 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 863 Invalid, 0 Unknown, 334 Unchecked, 0.3s Time] [2022-03-03 19:16:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-03-03 19:16:56,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2050. [2022-03-03 19:16:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 3.5285505124450953) internal successors, (7230), 2049 states have internal predecessors, (7230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 7230 transitions. [2022-03-03 19:16:56,379 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 7230 transitions. Word has length 23 [2022-03-03 19:16:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:56,379 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 7230 transitions. [2022-03-03 19:16:56,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 7230 transitions. [2022-03-03 19:16:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:56,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:56,381 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] [2022-03-03 19:16:56,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:56,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-03 19:16:56,587 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:56,588 INFO L85 PathProgramCache]: Analyzing trace with hash 118855181, now seen corresponding path program 282 times [2022-03-03 19:16:56,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:56,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766968356] [2022-03-03 19:16:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:56,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:56,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:56,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766968356] [2022-03-03 19:16:56,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766968356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:56,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167230874] [2022-03-03 19:16:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:16:56,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:56,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:56,699 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) [2022-03-03 19:16:56,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-03 19:16:57,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:16:57,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:16:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:57,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-03 19:16:57,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:16:57,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 244 [2022-03-03 19:16:57,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 190 [2022-03-03 19:16:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:57,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:16:58,119 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 189 treesize of output 173 [2022-03-03 19:16:58,506 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 275 treesize of output 239 [2022-03-03 19:16:58,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:16:58,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 222 [2022-03-03 19:16:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:16:58,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167230874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:16:58,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:16:58,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:16:58,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091351101] [2022-03-03 19:16:58,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:16:58,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:16:58,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:16:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:16:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:16:58,720 INFO L87 Difference]: Start difference. First operand 2050 states and 7230 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:16:58,960 INFO L93 Difference]: Finished difference Result 2426 states and 8274 transitions. [2022-03-03 19:16:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:16:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:16:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:16:58,965 INFO L225 Difference]: With dead ends: 2426 [2022-03-03 19:16:58,965 INFO L226 Difference]: Without dead ends: 2315 [2022-03-03 19:16:58,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:16:58,965 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:16:58,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 301 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 495 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-03-03 19:16:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-03 19:16:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2088. [2022-03-03 19:16:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 3.5232390991854334) internal successors, (7353), 2087 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 7353 transitions. [2022-03-03 19:16:58,991 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 7353 transitions. Word has length 23 [2022-03-03 19:16:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:16:58,991 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 7353 transitions. [2022-03-03 19:16:58,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:16:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 7353 transitions. [2022-03-03 19:16:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:16:58,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:16:58,994 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] [2022-03-03 19:16:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-03 19:16:59,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-03 19:16:59,194 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:16:59,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:16:59,194 INFO L85 PathProgramCache]: Analyzing trace with hash -799442709, now seen corresponding path program 283 times [2022-03-03 19:16:59,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:16:59,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601970247] [2022-03-03 19:16:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:16:59,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:16:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:16:59,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:16:59,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601970247] [2022-03-03 19:16:59,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601970247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:16:59,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330463095] [2022-03-03 19:16:59,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:16:59,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:16:59,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:16:59,464 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) [2022-03-03 19:16:59,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-03 19:16:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:16:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:16:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:16:59,872 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 199 treesize of output 183 [2022-03-03 19:17:00,239 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 145 treesize of output 125 [2022-03-03 19:17:00,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:00,242 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 137 treesize of output 119 [2022-03-03 19:17:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:00,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:00,528 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 197 treesize of output 177 [2022-03-03 19:17:00,997 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:17:00,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 284 [2022-03-03 19:17:01,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 230 [2022-03-03 19:17:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:01,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330463095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:01,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:01,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-03-03 19:17:01,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756183413] [2022-03-03 19:17:01,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:01,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:17:01,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:17:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:17:01,125 INFO L87 Difference]: Start difference. First operand 2088 states and 7353 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:01,923 INFO L93 Difference]: Finished difference Result 2956 states and 10025 transitions. [2022-03-03 19:17:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:17:01,923 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 [2022-03-03 19:17:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:01,929 INFO L225 Difference]: With dead ends: 2956 [2022-03-03 19:17:01,929 INFO L226 Difference]: Without dead ends: 2852 [2022-03-03 19:17:01,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:17:01,929 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 143 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:01,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 698 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1083 Invalid, 0 Unknown, 321 Unchecked, 0.3s Time] [2022-03-03 19:17:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-03-03 19:17:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2156. [2022-03-03 19:17:01,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.520185614849188) internal successors, (7586), 2155 states have internal predecessors, (7586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7586 transitions. [2022-03-03 19:17:01,962 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7586 transitions. Word has length 23 [2022-03-03 19:17:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:01,962 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 7586 transitions. [2022-03-03 19:17:01,962 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) [2022-03-03 19:17:01,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7586 transitions. [2022-03-03 19:17:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:01,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:01,965 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] [2022-03-03 19:17:01,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Ended with exit code 0 [2022-03-03 19:17:02,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-03 19:17:02,180 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1951278285, now seen corresponding path program 284 times [2022-03-03 19:17:02,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:02,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605143080] [2022-03-03 19:17:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:02,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:02,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605143080] [2022-03-03 19:17:02,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605143080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:02,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95868247] [2022-03-03 19:17:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:17:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:02,301 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) [2022-03-03 19:17:02,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-03 19:17:02,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:17:02,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:02,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:02,770 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 231 treesize of output 203 [2022-03-03 19:17:03,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:03,057 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 212 treesize of output 180 [2022-03-03 19:17:03,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 126 [2022-03-03 19:17:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:17:03,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:03,677 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 214 treesize of output 194 [2022-03-03 19:17:03,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:17:03,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:03,981 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 222 treesize of output 192 [2022-03-03 19:17:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:17:04,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95868247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:04,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:04,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:17:04,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627445120] [2022-03-03 19:17:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:04,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:04,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:04,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:04,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:04,315 INFO L87 Difference]: Start difference. First operand 2156 states and 7586 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:07,032 INFO L93 Difference]: Finished difference Result 3932 states and 12821 transitions. [2022-03-03 19:17:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:17:07,033 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 [2022-03-03 19:17:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:07,039 INFO L225 Difference]: With dead ends: 3932 [2022-03-03 19:17:07,039 INFO L226 Difference]: Without dead ends: 3627 [2022-03-03 19:17:07,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=566, Invalid=5286, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:17:07,040 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 311 mSDsluCounter, 2622 mSDsCounter, 0 mSdLazyCounter, 3669 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 3669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:07,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1188 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 3669 Invalid, 0 Unknown, 183 Unchecked, 1.1s Time] [2022-03-03 19:17:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-03-03 19:17:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1818. [2022-03-03 19:17:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.7171161254815632) internal successors, (6754), 1817 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 6754 transitions. [2022-03-03 19:17:07,071 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 6754 transitions. Word has length 23 [2022-03-03 19:17:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:07,072 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 6754 transitions. [2022-03-03 19:17:07,072 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) [2022-03-03 19:17:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 6754 transitions. [2022-03-03 19:17:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:07,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:07,074 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] [2022-03-03 19:17:07,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-03 19:17:07,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-03 19:17:07,287 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1919523695, now seen corresponding path program 285 times [2022-03-03 19:17:07,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:07,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375481632] [2022-03-03 19:17:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:07,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:07,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375481632] [2022-03-03 19:17:07,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375481632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:07,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105261886] [2022-03-03 19:17:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:17:07,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:07,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:07,512 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) [2022-03-03 19:17:07,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-03 19:17:07,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:17:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:07,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:07,985 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 [2022-03-03 19:17:08,514 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 342 treesize of output 286 [2022-03-03 19:17:08,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:08,519 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 264 [2022-03-03 19:17:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:17:08,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:09,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-03 19:17:09,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:09,493 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 326 treesize of output 292 [2022-03-03 19:17:09,497 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 257 treesize of output 221 [2022-03-03 19:17:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:17:09,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105261886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:09,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:09,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:17:09,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059271733] [2022-03-03 19:17:09,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:09,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:17:09,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:17:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:17:09,690 INFO L87 Difference]: Start difference. First operand 1818 states and 6754 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:13,234 INFO L93 Difference]: Finished difference Result 3624 states and 12109 transitions. [2022-03-03 19:17:13,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 19:17:13,234 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 [2022-03-03 19:17:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:13,240 INFO L225 Difference]: With dead ends: 3624 [2022-03-03 19:17:13,240 INFO L226 Difference]: Without dead ends: 3253 [2022-03-03 19:17:13,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3987 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1219, Invalid=10771, Unknown=0, NotChecked=0, Total=11990 [2022-03-03 19:17:13,242 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 417 mSDsluCounter, 2488 mSDsCounter, 0 mSdLazyCounter, 3092 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 3642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:13,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1316 Invalid, 3642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3092 Invalid, 0 Unknown, 356 Unchecked, 1.0s Time] [2022-03-03 19:17:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3253 states. [2022-03-03 19:17:13,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3253 to 2004. [2022-03-03 19:17:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.7219171243135296) internal successors, (7455), 2003 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7455 transitions. [2022-03-03 19:17:13,276 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7455 transitions. Word has length 23 [2022-03-03 19:17:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:13,276 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 7455 transitions. [2022-03-03 19:17:13,276 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) [2022-03-03 19:17:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7455 transitions. [2022-03-03 19:17:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:13,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:13,279 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] [2022-03-03 19:17:13,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-03 19:17:13,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-03-03 19:17:13,496 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash 160947901, now seen corresponding path program 286 times [2022-03-03 19:17:13,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:13,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144380177] [2022-03-03 19:17:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:13,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:13,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:13,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144380177] [2022-03-03 19:17:13,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144380177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:13,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991594694] [2022-03-03 19:17:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:17:13,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:13,582 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) [2022-03-03 19:17:13,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-03 19:17:13,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:17:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:13,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:17:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:14,096 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 281 treesize of output 251 [2022-03-03 19:17:14,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 186 [2022-03-03 19:17:14,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:14,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 180 [2022-03-03 19:17:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:14,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:15,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 277 [2022-03-03 19:17:15,393 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 188 treesize of output 164 [2022-03-03 19:17:15,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:15,400 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 178 treesize of output 164 [2022-03-03 19:17:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:15,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991594694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:15,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:15,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:17:15,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096016979] [2022-03-03 19:17:15,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:15,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:17:15,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:17:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:17:15,613 INFO L87 Difference]: Start difference. First operand 2004 states and 7455 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:16,159 INFO L93 Difference]: Finished difference Result 2738 states and 9602 transitions. [2022-03-03 19:17:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:17:16,160 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 [2022-03-03 19:17:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:16,165 INFO L225 Difference]: With dead ends: 2738 [2022-03-03 19:17:16,165 INFO L226 Difference]: Without dead ends: 2605 [2022-03-03 19:17:16,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:17:16,165 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 196 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:16,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 341 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:17:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2022-03-03 19:17:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1987. [2022-03-03 19:17:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.727593152064451) internal successors, (7403), 1986 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7403 transitions. [2022-03-03 19:17:16,194 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7403 transitions. Word has length 23 [2022-03-03 19:17:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:16,194 INFO L470 AbstractCegarLoop]: Abstraction has 1987 states and 7403 transitions. [2022-03-03 19:17:16,194 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) [2022-03-03 19:17:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7403 transitions. [2022-03-03 19:17:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:16,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:16,197 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] [2022-03-03 19:17:16,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-03 19:17:16,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-03 19:17:16,414 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:16,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1108816465, now seen corresponding path program 287 times [2022-03-03 19:17:16,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:16,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890302853] [2022-03-03 19:17:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:16,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:16,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:16,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890302853] [2022-03-03 19:17:16,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890302853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:16,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270319004] [2022-03-03 19:17:16,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:17:16,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:16,616 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) [2022-03-03 19:17:16,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-03 19:17:16,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:17:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:16,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:17:16,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:17,073 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 216 treesize of output 196 [2022-03-03 19:17:17,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:17,252 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 190 treesize of output 164 [2022-03-03 19:17:17,255 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 153 treesize of output 135 [2022-03-03 19:17:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:17,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:17,719 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 188 treesize of output 168 [2022-03-03 19:17:17,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:17:17,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:17,978 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 153 treesize of output 143 [2022-03-03 19:17:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:18,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270319004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:18,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:18,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-03 19:17:18,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555052769] [2022-03-03 19:17:18,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:18,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:18,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:18,119 INFO L87 Difference]: Start difference. First operand 1987 states and 7403 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:19,579 INFO L93 Difference]: Finished difference Result 3578 states and 12230 transitions. [2022-03-03 19:17:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:17:19,579 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 [2022-03-03 19:17:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:19,586 INFO L225 Difference]: With dead ends: 3578 [2022-03-03 19:17:19,587 INFO L226 Difference]: Without dead ends: 3330 [2022-03-03 19:17:19,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=2481, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:17:19,587 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 303 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:19,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 511 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:17:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-03-03 19:17:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2089. [2022-03-03 19:17:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.7863984674329503) internal successors, (7906), 2088 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7906 transitions. [2022-03-03 19:17:19,624 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7906 transitions. Word has length 23 [2022-03-03 19:17:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:19,625 INFO L470 AbstractCegarLoop]: Abstraction has 2089 states and 7906 transitions. [2022-03-03 19:17:19,625 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) [2022-03-03 19:17:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7906 transitions. [2022-03-03 19:17:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:19,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:19,628 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] [2022-03-03 19:17:19,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-03-03 19:17:19,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:19,846 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1863026185, now seen corresponding path program 288 times [2022-03-03 19:17:19,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:19,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22340704] [2022-03-03 19:17:19,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:19,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:19,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:19,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22340704] [2022-03-03 19:17:19,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22340704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:19,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270168673] [2022-03-03 19:17:19,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:17:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:19,989 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) [2022-03-03 19:17:19,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-03 19:17:20,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:17:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:20,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:20,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 159 [2022-03-03 19:17:20,696 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 128 treesize of output 112 [2022-03-03 19:17:20,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:20,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:17:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:20,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:21,137 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 182 treesize of output 166 [2022-03-03 19:17:21,338 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:21,338 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 177 [2022-03-03 19:17:21,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-03-03 19:17:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:21,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270168673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:21,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:21,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:17:21,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192116932] [2022-03-03 19:17:21,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:21,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:17:21,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:17:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:17:21,509 INFO L87 Difference]: Start difference. First operand 2089 states and 7906 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:24,406 INFO L93 Difference]: Finished difference Result 3595 states and 12374 transitions. [2022-03-03 19:17:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:17:24,406 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 [2022-03-03 19:17:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:24,413 INFO L225 Difference]: With dead ends: 3595 [2022-03-03 19:17:24,413 INFO L226 Difference]: Without dead ends: 3426 [2022-03-03 19:17:24,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=816, Invalid=6324, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:17:24,414 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 355 mSDsluCounter, 2134 mSDsCounter, 0 mSdLazyCounter, 3206 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:24,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1158 Invalid, 3587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3206 Invalid, 0 Unknown, 272 Unchecked, 1.0s Time] [2022-03-03 19:17:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2022-03-03 19:17:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 2156. [2022-03-03 19:17:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.810672853828306) internal successors, (8212), 2155 states have internal predecessors, (8212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 8212 transitions. [2022-03-03 19:17:24,449 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 8212 transitions. Word has length 23 [2022-03-03 19:17:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:24,449 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 8212 transitions. [2022-03-03 19:17:24,449 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) [2022-03-03 19:17:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 8212 transitions. [2022-03-03 19:17:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:24,452 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:24,452 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] [2022-03-03 19:17:24,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-03-03 19:17:24,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2022-03-03 19:17:24,669 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:24,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1304107393, now seen corresponding path program 289 times [2022-03-03 19:17:24,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:24,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765359825] [2022-03-03 19:17:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:24,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:24,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765359825] [2022-03-03 19:17:24,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765359825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:24,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202326648] [2022-03-03 19:17:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:17:24,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:24,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:24,764 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) [2022-03-03 19:17:24,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-03 19:17:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:25,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-03 19:17:25,542 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 148 treesize of output 128 [2022-03-03 19:17:25,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:25,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 140 [2022-03-03 19:17:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:25,768 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 171 treesize of output 151 [2022-03-03 19:17:26,219 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 390 treesize of output 330 [2022-03-03 19:17:26,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:26,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 307 [2022-03-03 19:17:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:26,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202326648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:26,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:26,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:17:26,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137623688] [2022-03-03 19:17:26,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:26,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:26,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:26,426 INFO L87 Difference]: Start difference. First operand 2156 states and 8212 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:29,885 INFO L93 Difference]: Finished difference Result 4203 states and 14028 transitions. [2022-03-03 19:17:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 19:17:29,885 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 [2022-03-03 19:17:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:29,892 INFO L225 Difference]: With dead ends: 4203 [2022-03-03 19:17:29,892 INFO L226 Difference]: Without dead ends: 3828 [2022-03-03 19:17:29,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=768, Invalid=7242, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:17:29,893 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 377 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 2723 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 3536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:29,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1292 Invalid, 3536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2723 Invalid, 0 Unknown, 664 Unchecked, 1.0s Time] [2022-03-03 19:17:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2022-03-03 19:17:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 2155. [2022-03-03 19:17:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.7920148560817086) internal successors, (8168), 2154 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 8168 transitions. [2022-03-03 19:17:29,928 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 8168 transitions. Word has length 23 [2022-03-03 19:17:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:29,928 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 8168 transitions. [2022-03-03 19:17:29,928 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) [2022-03-03 19:17:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 8168 transitions. [2022-03-03 19:17:29,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:29,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:29,931 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] [2022-03-03 19:17:29,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-03 19:17:30,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:30,148 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:30,149 INFO L85 PathProgramCache]: Analyzing trace with hash 874469363, now seen corresponding path program 290 times [2022-03-03 19:17:30,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:30,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841744559] [2022-03-03 19:17:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:30,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:30,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841744559] [2022-03-03 19:17:30,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841744559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:30,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114403480] [2022-03-03 19:17:30,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:17:30,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:30,222 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) [2022-03-03 19:17:30,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-03 19:17:30,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:17:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:30,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 137 [2022-03-03 19:17:31,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 227 [2022-03-03 19:17:31,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:31,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 213 [2022-03-03 19:17:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:31,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:31,361 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 171 treesize of output 151 [2022-03-03 19:17:31,658 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 329 treesize of output 285 [2022-03-03 19:17:31,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:31,666 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 296 treesize of output 262 [2022-03-03 19:17:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:31,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114403480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:31,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:31,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:17:31,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432363039] [2022-03-03 19:17:31,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:31,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:31,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:31,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:31,897 INFO L87 Difference]: Start difference. First operand 2155 states and 8168 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:33,317 INFO L93 Difference]: Finished difference Result 3478 states and 11927 transitions. [2022-03-03 19:17:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:17:33,317 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 [2022-03-03 19:17:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:33,323 INFO L225 Difference]: With dead ends: 3478 [2022-03-03 19:17:33,323 INFO L226 Difference]: Without dead ends: 3288 [2022-03-03 19:17:33,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=3931, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:17:33,323 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 205 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 2690 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:33,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 1077 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2690 Invalid, 0 Unknown, 407 Unchecked, 0.7s Time] [2022-03-03 19:17:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-03-03 19:17:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2082. [2022-03-03 19:17:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 3.7775108121095626) internal successors, (7861), 2081 states have internal predecessors, (7861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 7861 transitions. [2022-03-03 19:17:33,356 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 7861 transitions. Word has length 23 [2022-03-03 19:17:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:33,356 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 7861 transitions. [2022-03-03 19:17:33,356 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) [2022-03-03 19:17:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 7861 transitions. [2022-03-03 19:17:33,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:33,359 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:33,359 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] [2022-03-03 19:17:33,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-03 19:17:33,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:33,579 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash -28660117, now seen corresponding path program 291 times [2022-03-03 19:17:33,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:33,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462069736] [2022-03-03 19:17:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:33,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:33,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:33,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462069736] [2022-03-03 19:17:33,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462069736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:33,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906846087] [2022-03-03 19:17:33,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:17:33,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:33,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:33,693 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) [2022-03-03 19:17:33,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-03 19:17:33,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:17:33,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:34,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 244 [2022-03-03 19:17:34,409 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 145 treesize of output 125 [2022-03-03 19:17:34,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:34,413 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 137 treesize of output 119 [2022-03-03 19:17:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:34,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:34,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-03-03 19:17:35,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:35,125 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 288 treesize of output 266 [2022-03-03 19:17:35,129 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 234 treesize of output 194 [2022-03-03 19:17:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:35,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906846087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:35,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:35,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:17:35,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611365610] [2022-03-03 19:17:35,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:35,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:17:35,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:17:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:17:35,365 INFO L87 Difference]: Start difference. First operand 2082 states and 7861 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:36,909 INFO L93 Difference]: Finished difference Result 2970 states and 10786 transitions. [2022-03-03 19:17:36,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:17:36,909 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 [2022-03-03 19:17:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:36,915 INFO L225 Difference]: With dead ends: 2970 [2022-03-03 19:17:36,915 INFO L226 Difference]: Without dead ends: 2764 [2022-03-03 19:17:36,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=2929, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:17:36,916 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:36,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 564 Invalid, 1950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1797 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-03-03 19:17:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-03-03 19:17:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2164. [2022-03-03 19:17:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 3.8187702265372168) internal successors, (8260), 2163 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 8260 transitions. [2022-03-03 19:17:36,948 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 8260 transitions. Word has length 23 [2022-03-03 19:17:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:36,948 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 8260 transitions. [2022-03-03 19:17:36,948 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) [2022-03-03 19:17:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 8260 transitions. [2022-03-03 19:17:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:36,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:36,952 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] [2022-03-03 19:17:36,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-03-03 19:17:37,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-03-03 19:17:37,169 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1491034655, now seen corresponding path program 292 times [2022-03-03 19:17:37,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:37,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154323657] [2022-03-03 19:17:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:37,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154323657] [2022-03-03 19:17:37,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154323657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219070741] [2022-03-03 19:17:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:17:37,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:37,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:37,350 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) [2022-03-03 19:17:37,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-03 19:17:37,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:17:37,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:37,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:37,783 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 164 treesize of output 150 [2022-03-03 19:17:37,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:17:37,970 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 161 treesize of output 141 [2022-03-03 19:17:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:38,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:38,427 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 159 treesize of output 139 [2022-03-03 19:17:38,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:38,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 300 [2022-03-03 19:17:38,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 236 [2022-03-03 19:17:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:39,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219070741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:39,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:39,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 25 [2022-03-03 19:17:39,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33341560] [2022-03-03 19:17:39,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:39,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:39,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:39,146 INFO L87 Difference]: Start difference. First operand 2164 states and 8260 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:39,893 INFO L93 Difference]: Finished difference Result 2992 states and 10795 transitions. [2022-03-03 19:17:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:17:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:17:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:39,899 INFO L225 Difference]: With dead ends: 2992 [2022-03-03 19:17:39,899 INFO L226 Difference]: Without dead ends: 2845 [2022-03-03 19:17:39,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:17:39,900 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 189 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:39,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 336 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:17:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2845 states. [2022-03-03 19:17:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2845 to 2215. [2022-03-03 19:17:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 3.832429990966576) internal successors, (8485), 2214 states have internal predecessors, (8485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 8485 transitions. [2022-03-03 19:17:39,933 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 8485 transitions. Word has length 23 [2022-03-03 19:17:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:39,933 INFO L470 AbstractCegarLoop]: Abstraction has 2215 states and 8485 transitions. [2022-03-03 19:17:39,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 8485 transitions. [2022-03-03 19:17:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:39,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:39,937 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] [2022-03-03 19:17:39,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-03 19:17:40,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:40,151 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1203444595, now seen corresponding path program 293 times [2022-03-03 19:17:40,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:40,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964649201] [2022-03-03 19:17:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:40,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:40,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964649201] [2022-03-03 19:17:40,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964649201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:40,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964537314] [2022-03-03 19:17:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:17:40,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:40,295 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) [2022-03-03 19:17:40,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-03 19:17:40,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:17:40,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:40,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:40,773 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 187 treesize of output 163 [2022-03-03 19:17:41,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:41,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 240 [2022-03-03 19:17:41,239 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 206 treesize of output 180 [2022-03-03 19:17:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:41,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:41,790 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 171 treesize of output 151 [2022-03-03 19:17:42,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-03-03 19:17:42,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:42,070 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 300 treesize of output 262 [2022-03-03 19:17:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:42,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964537314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:42,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:42,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:17:42,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435117584] [2022-03-03 19:17:42,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:42,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:42,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:42,273 INFO L87 Difference]: Start difference. First operand 2215 states and 8485 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:45,073 INFO L93 Difference]: Finished difference Result 3510 states and 12421 transitions. [2022-03-03 19:17:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:17:45,073 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 [2022-03-03 19:17:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:45,080 INFO L225 Difference]: With dead ends: 3510 [2022-03-03 19:17:45,080 INFO L226 Difference]: Without dead ends: 3344 [2022-03-03 19:17:45,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=681, Invalid=5639, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:17:45,081 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 348 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:45,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 718 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2112 Invalid, 0 Unknown, 419 Unchecked, 0.7s Time] [2022-03-03 19:17:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-03-03 19:17:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2288. [2022-03-03 19:17:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.8447748141670313) internal successors, (8793), 2287 states have internal predecessors, (8793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8793 transitions. [2022-03-03 19:17:45,117 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8793 transitions. Word has length 23 [2022-03-03 19:17:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:45,117 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 8793 transitions. [2022-03-03 19:17:45,117 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) [2022-03-03 19:17:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8793 transitions. [2022-03-03 19:17:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:45,121 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:45,121 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] [2022-03-03 19:17:45,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-03 19:17:45,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-03 19:17:45,338 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1736534693, now seen corresponding path program 294 times [2022-03-03 19:17:45,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:45,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858779385] [2022-03-03 19:17:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:45,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:45,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858779385] [2022-03-03 19:17:45,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858779385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:45,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826120539] [2022-03-03 19:17:45,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:17:45,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:45,431 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) [2022-03-03 19:17:45,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-03 19:17:45,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:17:45,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:45,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:45,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 228 treesize of output 198 [2022-03-03 19:17:46,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-03 19:17:46,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:46,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 174 [2022-03-03 19:17:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:46,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:46,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-03 19:17:47,146 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 247 treesize of output 219 [2022-03-03 19:17:47,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:47,152 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 230 treesize of output 212 [2022-03-03 19:17:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:47,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826120539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:47,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:47,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:17:47,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385881435] [2022-03-03 19:17:47,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:47,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:47,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:47,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:47,399 INFO L87 Difference]: Start difference. First operand 2288 states and 8793 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:49,718 INFO L93 Difference]: Finished difference Result 3808 states and 13029 transitions. [2022-03-03 19:17:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:17:49,718 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 [2022-03-03 19:17:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:49,724 INFO L225 Difference]: With dead ends: 3808 [2022-03-03 19:17:49,725 INFO L226 Difference]: Without dead ends: 3543 [2022-03-03 19:17:49,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=507, Invalid=5345, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:17:49,725 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 319 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:49,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 978 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2545 Invalid, 0 Unknown, 309 Unchecked, 0.8s Time] [2022-03-03 19:17:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2022-03-03 19:17:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2322. [2022-03-03 19:17:49,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 3.838862559241706) internal successors, (8910), 2321 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 8910 transitions. [2022-03-03 19:17:49,766 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 8910 transitions. Word has length 23 [2022-03-03 19:17:49,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:49,767 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 8910 transitions. [2022-03-03 19:17:49,767 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) [2022-03-03 19:17:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 8910 transitions. [2022-03-03 19:17:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:49,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:49,770 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] [2022-03-03 19:17:49,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-03 19:17:49,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-03 19:17:49,988 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1384159003, now seen corresponding path program 295 times [2022-03-03 19:17:49,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:49,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440153870] [2022-03-03 19:17:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:49,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:50,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:50,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440153870] [2022-03-03 19:17:50,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440153870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:50,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216335079] [2022-03-03 19:17:50,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:17:50,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:50,097 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) [2022-03-03 19:17:50,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-03 19:17:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:17:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:50,643 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 282 treesize of output 242 [2022-03-03 19:17:51,148 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 145 treesize of output 125 [2022-03-03 19:17:51,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:51,151 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:17:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:51,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:51,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 230 [2022-03-03 19:17:51,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 226 [2022-03-03 19:17:51,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:51,960 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 243 treesize of output 213 [2022-03-03 19:17:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:17:52,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216335079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:52,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:52,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:17:52,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500065220] [2022-03-03 19:17:52,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:52,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:17:52,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:17:52,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:17:52,155 INFO L87 Difference]: Start difference. First operand 2322 states and 8910 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:54,304 INFO L93 Difference]: Finished difference Result 3899 states and 13323 transitions. [2022-03-03 19:17:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:17:54,304 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 [2022-03-03 19:17:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:54,311 INFO L225 Difference]: With dead ends: 3899 [2022-03-03 19:17:54,311 INFO L226 Difference]: Without dead ends: 3400 [2022-03-03 19:17:54,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=571, Invalid=5749, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:17:54,312 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 241 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 378 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:54,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1032 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2863 Invalid, 0 Unknown, 378 Unchecked, 0.8s Time] [2022-03-03 19:17:54,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-03-03 19:17:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2323. [2022-03-03 19:17:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.8238587424633934) internal successors, (8879), 2322 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 8879 transitions. [2022-03-03 19:17:54,347 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 8879 transitions. Word has length 23 [2022-03-03 19:17:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:54,348 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 8879 transitions. [2022-03-03 19:17:54,348 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) [2022-03-03 19:17:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 8879 transitions. [2022-03-03 19:17:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:54,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:54,351 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] [2022-03-03 19:17:54,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-03 19:17:54,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:54,568 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -468315819, now seen corresponding path program 296 times [2022-03-03 19:17:54,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:54,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310659547] [2022-03-03 19:17:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:54,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:54,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310659547] [2022-03-03 19:17:54,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310659547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:54,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917517328] [2022-03-03 19:17:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:17:54,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:54,783 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) [2022-03-03 19:17:54,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-03 19:17:55,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:17:55,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:55,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:17:55,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:55,431 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 336 treesize of output 302 [2022-03-03 19:17:55,644 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 [2022-03-03 19:17:55,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:55,647 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 160 treesize of output 140 [2022-03-03 19:17:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:55,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:56,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-03 19:17:56,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:56,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 188 [2022-03-03 19:17:56,442 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 179 treesize of output 159 [2022-03-03 19:17:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:56,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917517328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:17:56,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:17:56,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2022-03-03 19:17:56,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974346453] [2022-03-03 19:17:56,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:17:56,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:17:56,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:17:56,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:17:56,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:17:56,715 INFO L87 Difference]: Start difference. First operand 2323 states and 8879 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:17:57,769 INFO L93 Difference]: Finished difference Result 3850 states and 13654 transitions. [2022-03-03 19:17:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:17:57,769 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 [2022-03-03 19:17:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:17:57,777 INFO L225 Difference]: With dead ends: 3850 [2022-03-03 19:17:57,777 INFO L226 Difference]: Without dead ends: 3636 [2022-03-03 19:17:57,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=2414, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:17:57,777 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 291 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:17:57,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 398 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:17:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2022-03-03 19:17:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2444. [2022-03-03 19:17:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2443 states have (on average 3.880474826033565) internal successors, (9480), 2443 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:17:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 9480 transitions. [2022-03-03 19:17:57,818 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 9480 transitions. Word has length 23 [2022-03-03 19:17:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:17:57,818 INFO L470 AbstractCegarLoop]: Abstraction has 2444 states and 9480 transitions. [2022-03-03 19:17:57,818 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) [2022-03-03 19:17:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 9480 transitions. [2022-03-03 19:17:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:17:57,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:17:57,822 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] [2022-03-03 19:17:57,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Forceful destruction successful, exit code 0 [2022-03-03 19:17:58,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:58,038 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:17:58,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:17:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash -313878301, now seen corresponding path program 297 times [2022-03-03 19:17:58,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:17:58,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815747929] [2022-03-03 19:17:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:17:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:17:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:17:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:58,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:17:58,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815747929] [2022-03-03 19:17:58,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815747929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:17:58,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118930564] [2022-03-03 19:17:58,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:17:58,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:17:58,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:17:58,164 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) [2022-03-03 19:17:58,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-03 19:17:58,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:17:58,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:17:58,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:17:58,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:17:58,618 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 173 treesize of output 155 [2022-03-03 19:17:58,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:17:58,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-03-03 19:17:58,835 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 202 treesize of output 182 [2022-03-03 19:17:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:17:59,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:17:59,438 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 308 treesize of output 272 [2022-03-03 19:17:59,839 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 159 treesize of output 139 [2022-03-03 19:17:59,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:17:59,846 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 156 treesize of output 146 [2022-03-03 19:18:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:00,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118930564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:00,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:00,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-03 19:18:00,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124760119] [2022-03-03 19:18:00,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:00,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:18:00,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:18:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:18:00,180 INFO L87 Difference]: Start difference. First operand 2444 states and 9480 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:01,365 INFO L93 Difference]: Finished difference Result 3516 states and 12608 transitions. [2022-03-03 19:18:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:18:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:18:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:01,372 INFO L225 Difference]: With dead ends: 3516 [2022-03-03 19:18:01,372 INFO L226 Difference]: Without dead ends: 3296 [2022-03-03 19:18:01,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:18:01,373 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:01,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 496 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:18:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2022-03-03 19:18:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2454. [2022-03-03 19:18:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.8630248675091723) internal successors, (9476), 2453 states have internal predecessors, (9476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 9476 transitions. [2022-03-03 19:18:01,407 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 9476 transitions. Word has length 23 [2022-03-03 19:18:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:01,407 INFO L470 AbstractCegarLoop]: Abstraction has 2454 states and 9476 transitions. [2022-03-03 19:18:01,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 9476 transitions. [2022-03-03 19:18:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:01,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:01,410 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] [2022-03-03 19:18:01,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-03 19:18:01,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:01,615 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1422141247, now seen corresponding path program 298 times [2022-03-03 19:18:01,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:01,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969518355] [2022-03-03 19:18:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:01,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:01,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969518355] [2022-03-03 19:18:01,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969518355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:01,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502033113] [2022-03-03 19:18:01,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:18:01,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:01,810 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) [2022-03-03 19:18:01,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-03 19:18:02,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:18:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:18:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:02,350 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 270 treesize of output 234 [2022-03-03 19:18:02,649 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 296 treesize of output 264 [2022-03-03 19:18:02,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:02,653 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 291 treesize of output 243 [2022-03-03 19:18:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:03,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:03,209 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 233 treesize of output 209 [2022-03-03 19:18:03,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:03,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:18:03,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-03-03 19:18:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:03,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502033113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:03,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:03,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 29 [2022-03-03 19:18:03,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715034084] [2022-03-03 19:18:03,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:03,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:18:03,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:18:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:18:03,701 INFO L87 Difference]: Start difference. First operand 2454 states and 9476 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:06,630 INFO L93 Difference]: Finished difference Result 4808 states and 16488 transitions. [2022-03-03 19:18:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:18:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:18:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:06,639 INFO L225 Difference]: With dead ends: 4808 [2022-03-03 19:18:06,639 INFO L226 Difference]: Without dead ends: 4431 [2022-03-03 19:18:06,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=696, Invalid=6110, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:18:06,640 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 300 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 3153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:06,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 924 Invalid, 3153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:18:06,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2022-03-03 19:18:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2595. [2022-03-03 19:18:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2594 states have (on average 3.9136468774094064) internal successors, (10152), 2594 states have internal predecessors, (10152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:06,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 10152 transitions. [2022-03-03 19:18:06,689 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 10152 transitions. Word has length 23 [2022-03-03 19:18:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:06,689 INFO L470 AbstractCegarLoop]: Abstraction has 2595 states and 10152 transitions. [2022-03-03 19:18:06,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 10152 transitions. [2022-03-03 19:18:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:06,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:06,693 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] [2022-03-03 19:18:06,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-03-03 19:18:06,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:06,910 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:06,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1254181529, now seen corresponding path program 299 times [2022-03-03 19:18:06,910 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:06,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360872376] [2022-03-03 19:18:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:06,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:07,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:07,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360872376] [2022-03-03 19:18:07,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360872376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:07,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841171902] [2022-03-03 19:18:07,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:18:07,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:07,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:07,038 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) [2022-03-03 19:18:07,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-03 19:18:07,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:18:07,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:07,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 165 [2022-03-03 19:18:07,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:07,765 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 198 treesize of output 172 [2022-03-03 19:18:07,767 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 146 treesize of output 132 [2022-03-03 19:18:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:07,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:08,072 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 189 treesize of output 173 [2022-03-03 19:18:08,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:08,273 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 190 [2022-03-03 19:18:08,277 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 179 treesize of output 159 [2022-03-03 19:18:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:08,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841171902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:08,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:08,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:18:08,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180032645] [2022-03-03 19:18:08,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:08,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:18:08,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:18:08,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:18:08,537 INFO L87 Difference]: Start difference. First operand 2595 states and 10152 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:08,836 INFO L93 Difference]: Finished difference Result 3371 states and 12525 transitions. [2022-03-03 19:18:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:18:08,836 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 [2022-03-03 19:18:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:08,843 INFO L225 Difference]: With dead ends: 3371 [2022-03-03 19:18:08,843 INFO L226 Difference]: Without dead ends: 3231 [2022-03-03 19:18:08,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:18:08,843 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:08,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 257 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 666 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-03-03 19:18:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2022-03-03 19:18:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 2688. [2022-03-03 19:18:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 3.9077037588388537) internal successors, (10500), 2687 states have internal predecessors, (10500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 10500 transitions. [2022-03-03 19:18:08,885 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 10500 transitions. Word has length 23 [2022-03-03 19:18:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:08,885 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 10500 transitions. [2022-03-03 19:18:08,885 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) [2022-03-03 19:18:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 10500 transitions. [2022-03-03 19:18:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:08,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:08,889 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] [2022-03-03 19:18:08,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Forceful destruction successful, exit code 0 [2022-03-03 19:18:09,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:09,107 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:09,107 INFO L85 PathProgramCache]: Analyzing trace with hash 399571401, now seen corresponding path program 300 times [2022-03-03 19:18:09,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:09,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557200403] [2022-03-03 19:18:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:09,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:09,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:09,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557200403] [2022-03-03 19:18:09,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557200403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:09,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669319016] [2022-03-03 19:18:09,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:18:09,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:09,219 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) [2022-03-03 19:18:09,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-03 19:18:09,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:18:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:09,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:09,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:09,620 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 153 treesize of output 133 [2022-03-03 19:18:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:10,076 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 340 treesize of output 282 [2022-03-03 19:18:10,080 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 256 treesize of output 232 [2022-03-03 19:18:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:10,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:10,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 210 [2022-03-03 19:18:10,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 285 [2022-03-03 19:18:10,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:10,990 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 298 treesize of output 260 [2022-03-03 19:18:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:11,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669319016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:11,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:11,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-03-03 19:18:11,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054727461] [2022-03-03 19:18:11,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:11,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:18:11,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:11,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:18:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:18:11,362 INFO L87 Difference]: Start difference. First operand 2688 states and 10500 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:11,699 INFO L93 Difference]: Finished difference Result 3331 states and 12478 transitions. [2022-03-03 19:18:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:18:11,699 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 [2022-03-03 19:18:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:11,706 INFO L225 Difference]: With dead ends: 3331 [2022-03-03 19:18:11,706 INFO L226 Difference]: Without dead ends: 3229 [2022-03-03 19:18:11,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:18:11,706 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:11,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 305 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 770 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-03-03 19:18:11,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-03-03 19:18:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2645. [2022-03-03 19:18:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.9156580937972767) internal successors, (10353), 2644 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 10353 transitions. [2022-03-03 19:18:11,748 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 10353 transitions. Word has length 23 [2022-03-03 19:18:11,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:11,748 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 10353 transitions. [2022-03-03 19:18:11,748 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) [2022-03-03 19:18:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 10353 transitions. [2022-03-03 19:18:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:11,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:11,752 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] [2022-03-03 19:18:11,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-03-03 19:18:11,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:11,966 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2102661045, now seen corresponding path program 301 times [2022-03-03 19:18:11,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:11,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124522225] [2022-03-03 19:18:11,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:11,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:12,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:12,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124522225] [2022-03-03 19:18:12,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124522225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:12,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316643449] [2022-03-03 19:18:12,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:18:12,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:12,044 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) [2022-03-03 19:18:12,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-03 19:18:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:18:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:12,507 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 231 treesize of output 203 [2022-03-03 19:18:12,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:12,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 234 [2022-03-03 19:18:12,902 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 225 treesize of output 191 [2022-03-03 19:18:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:13,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:13,415 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 390 treesize of output 350 [2022-03-03 19:18:13,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-03-03 19:18:13,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:13,825 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 262 treesize of output 228 [2022-03-03 19:18:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:14,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316643449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:14,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:14,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:18:14,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948361044] [2022-03-03 19:18:14,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:14,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:18:14,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:18:14,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:18:14,104 INFO L87 Difference]: Start difference. First operand 2645 states and 10353 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:15,909 INFO L93 Difference]: Finished difference Result 3926 states and 13719 transitions. [2022-03-03 19:18:15,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:18:15,910 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 [2022-03-03 19:18:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:15,916 INFO L225 Difference]: With dead ends: 3926 [2022-03-03 19:18:15,916 INFO L226 Difference]: Without dead ends: 3458 [2022-03-03 19:18:15,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=4219, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:18:15,917 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 216 mSDsluCounter, 2076 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:15,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1045 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2012 Invalid, 0 Unknown, 891 Unchecked, 0.6s Time] [2022-03-03 19:18:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2022-03-03 19:18:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 2712. [2022-03-03 19:18:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 3.8911840649206937) internal successors, (10549), 2711 states have internal predecessors, (10549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 10549 transitions. [2022-03-03 19:18:15,962 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 10549 transitions. Word has length 23 [2022-03-03 19:18:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 10549 transitions. [2022-03-03 19:18:15,963 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) [2022-03-03 19:18:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 10549 transitions. [2022-03-03 19:18:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:15,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:15,967 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] [2022-03-03 19:18:15,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Forceful destruction successful, exit code 0 [2022-03-03 19:18:16,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-03-03 19:18:16,175 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1215499983, now seen corresponding path program 302 times [2022-03-03 19:18:16,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:16,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044724785] [2022-03-03 19:18:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:16,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:16,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044724785] [2022-03-03 19:18:16,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044724785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:16,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789918400] [2022-03-03 19:18:16,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:18:16,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:16,358 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) [2022-03-03 19:18:16,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-03 19:18:16,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:18:16,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:16,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:16,851 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 275 treesize of output 247 [2022-03-03 19:18:17,254 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 145 treesize of output 125 [2022-03-03 19:18:17,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:17,257 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 119 [2022-03-03 19:18:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:17,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:17,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 207 [2022-03-03 19:18:18,071 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:18:18,072 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 248 [2022-03-03 19:18:18,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 194 [2022-03-03 19:18:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:18,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789918400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:18,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:18,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-03-03 19:18:18,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186513176] [2022-03-03 19:18:18,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:18,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:18:18,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:18,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:18:18,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:18:18,181 INFO L87 Difference]: Start difference. First operand 2712 states and 10549 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:19,517 INFO L93 Difference]: Finished difference Result 3699 states and 13779 transitions. [2022-03-03 19:18:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:18:19,517 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 [2022-03-03 19:18:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:19,544 INFO L225 Difference]: With dead ends: 3699 [2022-03-03 19:18:19,544 INFO L226 Difference]: Without dead ends: 3589 [2022-03-03 19:18:19,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=2627, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:18:19,544 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:19,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 635 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1480 Invalid, 0 Unknown, 361 Unchecked, 0.5s Time] [2022-03-03 19:18:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-03-03 19:18:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2713. [2022-03-03 19:18:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 3.8934365781710913) internal successors, (10559), 2712 states have internal predecessors, (10559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 10559 transitions. [2022-03-03 19:18:19,582 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 10559 transitions. Word has length 23 [2022-03-03 19:18:19,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:19,582 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 10559 transitions. [2022-03-03 19:18:19,582 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) [2022-03-03 19:18:19,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 10559 transitions. [2022-03-03 19:18:19,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:19,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:19,586 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] [2022-03-03 19:18:19,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-03 19:18:19,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:19,790 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:19,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1141889615, now seen corresponding path program 303 times [2022-03-03 19:18:19,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:19,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338979788] [2022-03-03 19:18:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:19,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:19,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:19,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338979788] [2022-03-03 19:18:19,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338979788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:19,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925745585] [2022-03-03 19:18:19,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:18:19,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:19,983 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) [2022-03-03 19:18:19,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-03 19:18:20,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:18:20,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:20,428 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 220 treesize of output 186 [2022-03-03 19:18:20,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:20,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 260 [2022-03-03 19:18:20,940 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 258 treesize of output 226 [2022-03-03 19:18:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:21,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:21,329 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 206 treesize of output 186 [2022-03-03 19:18:21,735 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:18:21,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 251 treesize of output 224 [2022-03-03 19:18:21,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 186 [2022-03-03 19:18:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:21,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925745585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:21,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:21,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-03-03 19:18:21,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227352605] [2022-03-03 19:18:21,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:21,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:18:21,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:21,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:18:21,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:18:21,864 INFO L87 Difference]: Start difference. First operand 2713 states and 10559 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:23,439 INFO L93 Difference]: Finished difference Result 3636 states and 13524 transitions. [2022-03-03 19:18:23,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:18:23,439 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 [2022-03-03 19:18:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:23,447 INFO L225 Difference]: With dead ends: 3636 [2022-03-03 19:18:23,447 INFO L226 Difference]: Without dead ends: 3556 [2022-03-03 19:18:23,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=360, Invalid=2832, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:18:23,448 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 128 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:23,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 700 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1760 Invalid, 0 Unknown, 110 Unchecked, 0.6s Time] [2022-03-03 19:18:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2022-03-03 19:18:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2715. [2022-03-03 19:18:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.8942520265291085) internal successors, (10569), 2714 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 10569 transitions. [2022-03-03 19:18:23,491 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 10569 transitions. Word has length 23 [2022-03-03 19:18:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:23,491 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 10569 transitions. [2022-03-03 19:18:23,491 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) [2022-03-03 19:18:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 10569 transitions. [2022-03-03 19:18:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:23,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:23,495 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] [2022-03-03 19:18:23,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-03 19:18:23,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-03 19:18:23,708 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 339906849, now seen corresponding path program 304 times [2022-03-03 19:18:23,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:23,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374923746] [2022-03-03 19:18:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:23,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:23,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374923746] [2022-03-03 19:18:23,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374923746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:23,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845845770] [2022-03-03 19:18:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:18:23,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:23,878 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) [2022-03-03 19:18:23,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-03 19:18:24,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:18:24,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:24,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:24,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 155 [2022-03-03 19:18:24,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:24,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 210 [2022-03-03 19:18:24,746 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 171 treesize of output 155 [2022-03-03 19:18:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:25,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:25,267 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 142 treesize of output 126 [2022-03-03 19:18:25,556 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 329 treesize of output 277 [2022-03-03 19:18:25,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:25,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 290 treesize of output 264 [2022-03-03 19:18:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:25,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845845770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:25,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:25,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:18:25,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348339534] [2022-03-03 19:18:25,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:25,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:18:25,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:18:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:18:25,748 INFO L87 Difference]: Start difference. First operand 2715 states and 10569 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:29,500 INFO L93 Difference]: Finished difference Result 4433 states and 15977 transitions. [2022-03-03 19:18:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:18:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:18:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:29,510 INFO L225 Difference]: With dead ends: 4433 [2022-03-03 19:18:29,510 INFO L226 Difference]: Without dead ends: 4315 [2022-03-03 19:18:29,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 34 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2432 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=972, Invalid=6510, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:18:29,511 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 399 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:29,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 662 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 1624 Invalid, 0 Unknown, 380 Unchecked, 0.6s Time] [2022-03-03 19:18:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2022-03-03 19:18:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2629. [2022-03-03 19:18:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.86910197869102) internal successors, (10168), 2628 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10168 transitions. [2022-03-03 19:18:29,575 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10168 transitions. Word has length 23 [2022-03-03 19:18:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:29,575 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 10168 transitions. [2022-03-03 19:18:29,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10168 transitions. [2022-03-03 19:18:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:29,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:29,580 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] [2022-03-03 19:18:29,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-03 19:18:29,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-03 19:18:29,798 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1107162753, now seen corresponding path program 305 times [2022-03-03 19:18:29,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:29,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912705511] [2022-03-03 19:18:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:29,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:29,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912705511] [2022-03-03 19:18:29,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912705511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:29,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906615992] [2022-03-03 19:18:29,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:18:29,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:29,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:29,963 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:18:29,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-03 19:18:30,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:18:30,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:18:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:30,386 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 171 treesize of output 153 [2022-03-03 19:18:30,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:18:30,617 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 200 treesize of output 170 [2022-03-03 19:18:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:30,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:30,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-03 19:18:31,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:18:31,268 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:18:31,268 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 242 treesize of output 211 [2022-03-03 19:18:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:31,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906615992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:31,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:31,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:18:31,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031766087] [2022-03-03 19:18:31,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:31,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:18:31,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:18:31,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:18:31,437 INFO L87 Difference]: Start difference. First operand 2629 states and 10168 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:37,898 INFO L93 Difference]: Finished difference Result 5453 states and 18718 transitions. [2022-03-03 19:18:37,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-03 19:18:37,898 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 [2022-03-03 19:18:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:37,907 INFO L225 Difference]: With dead ends: 5453 [2022-03-03 19:18:37,907 INFO L226 Difference]: Without dead ends: 4955 [2022-03-03 19:18:37,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2204, Invalid=15886, Unknown=0, NotChecked=0, Total=18090 [2022-03-03 19:18:37,908 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 517 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 5049 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 5049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:37,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1411 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5049 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:18:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2022-03-03 19:18:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 2687. [2022-03-03 19:18:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 3.8466120625465376) internal successors, (10332), 2686 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 10332 transitions. [2022-03-03 19:18:37,959 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 10332 transitions. Word has length 23 [2022-03-03 19:18:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:37,959 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 10332 transitions. [2022-03-03 19:18:37,959 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) [2022-03-03 19:18:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 10332 transitions. [2022-03-03 19:18:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:37,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:37,963 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] [2022-03-03 19:18:37,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-03-03 19:18:38,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-03 19:18:38,175 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:38,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1843242201, now seen corresponding path program 306 times [2022-03-03 19:18:38,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:38,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506585921] [2022-03-03 19:18:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:38,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:38,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:38,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506585921] [2022-03-03 19:18:38,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506585921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:38,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971555857] [2022-03-03 19:18:38,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:18:38,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:38,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:38,279 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) [2022-03-03 19:18:38,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-03 19:18:38,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:18:38,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:38,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 140 [2022-03-03 19:18:38,834 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 145 treesize of output 125 [2022-03-03 19:18:38,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:18:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:39,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:39,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:18:39,637 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 171 treesize of output 151 [2022-03-03 19:18:39,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:39,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:18:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:18:39,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971555857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:39,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:39,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:18:39,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282236947] [2022-03-03 19:18:39,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:39,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:18:39,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:18:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:18:39,822 INFO L87 Difference]: Start difference. First operand 2687 states and 10332 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:43,388 INFO L93 Difference]: Finished difference Result 5756 states and 19860 transitions. [2022-03-03 19:18:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-03 19:18:43,388 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 [2022-03-03 19:18:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:43,398 INFO L225 Difference]: With dead ends: 5756 [2022-03-03 19:18:43,398 INFO L226 Difference]: Without dead ends: 5400 [2022-03-03 19:18:43,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1039, Invalid=14711, Unknown=0, NotChecked=0, Total=15750 [2022-03-03 19:18:43,400 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 314 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 6276 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 6477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 6276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:43,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1587 Invalid, 6477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 6276 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-03 19:18:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-03-03 19:18:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2793. [2022-03-03 19:18:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.866045845272206) internal successors, (10794), 2792 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10794 transitions. [2022-03-03 19:18:43,456 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10794 transitions. Word has length 23 [2022-03-03 19:18:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:43,456 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 10794 transitions. [2022-03-03 19:18:43,456 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) [2022-03-03 19:18:43,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10794 transitions. [2022-03-03 19:18:43,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:43,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:43,461 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] [2022-03-03 19:18:43,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-03 19:18:43,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-03 19:18:43,675 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1821663053, now seen corresponding path program 307 times [2022-03-03 19:18:43,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:43,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218042095] [2022-03-03 19:18:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:43,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:43,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:43,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218042095] [2022-03-03 19:18:43,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218042095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:43,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583692274] [2022-03-03 19:18:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:18:43,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:43,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:43,769 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) [2022-03-03 19:18:43,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-03 19:18:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:44,239 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 147 [2022-03-03 19:18:44,458 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 210 treesize of output 176 [2022-03-03 19:18:44,461 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 223 treesize of output 191 [2022-03-03 19:18:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:44,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:45,024 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 293 treesize of output 265 [2022-03-03 19:18:45,281 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 206 treesize of output 182 [2022-03-03 19:18:45,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:45,288 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 193 treesize of output 179 [2022-03-03 19:18:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:45,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583692274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:45,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:45,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:18:45,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646494621] [2022-03-03 19:18:45,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:45,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:18:45,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:18:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:18:45,464 INFO L87 Difference]: Start difference. First operand 2793 states and 10794 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:51,472 INFO L93 Difference]: Finished difference Result 6951 states and 23527 transitions. [2022-03-03 19:18:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-03 19:18:51,472 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 [2022-03-03 19:18:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:51,485 INFO L225 Difference]: With dead ends: 6951 [2022-03-03 19:18:51,485 INFO L226 Difference]: Without dead ends: 6534 [2022-03-03 19:18:51,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10284 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2367, Invalid=24365, Unknown=0, NotChecked=0, Total=26732 [2022-03-03 19:18:51,488 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 508 mSDsluCounter, 2478 mSDsCounter, 0 mSdLazyCounter, 4159 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 4452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 4159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:51,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1311 Invalid, 4452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 4159 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:18:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2022-03-03 19:18:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 2956. [2022-03-03 19:18:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.8967851099830795) internal successors, (11515), 2955 states have internal predecessors, (11515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 11515 transitions. [2022-03-03 19:18:51,581 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 11515 transitions. Word has length 23 [2022-03-03 19:18:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:51,581 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 11515 transitions. [2022-03-03 19:18:51,581 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) [2022-03-03 19:18:51,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 11515 transitions. [2022-03-03 19:18:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:51,585 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:51,585 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] [2022-03-03 19:18:51,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-03-03 19:18:51,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:51,803 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash -69343389, now seen corresponding path program 308 times [2022-03-03 19:18:51,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:51,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558761891] [2022-03-03 19:18:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:51,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:51,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558761891] [2022-03-03 19:18:51,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558761891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:51,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574880689] [2022-03-03 19:18:51,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:18:51,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:51,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:51,896 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) [2022-03-03 19:18:51,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-03 19:18:52,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:18:52,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:52,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:52,405 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 269 treesize of output 231 [2022-03-03 19:18:52,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 219 treesize of output 187 [2022-03-03 19:18:52,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 147 [2022-03-03 19:18:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:52,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:52,968 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 171 treesize of output 151 [2022-03-03 19:18:53,213 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:18:53,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 186 [2022-03-03 19:18:53,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:18:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:53,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574880689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:53,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:53,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:18:53,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746452456] [2022-03-03 19:18:53,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:53,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:18:53,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:18:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:18:53,340 INFO L87 Difference]: Start difference. First operand 2956 states and 11515 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:18:57,669 INFO L93 Difference]: Finished difference Result 5445 states and 19195 transitions. [2022-03-03 19:18:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-03 19:18:57,669 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 [2022-03-03 19:18:57,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:18:57,679 INFO L225 Difference]: With dead ends: 5445 [2022-03-03 19:18:57,679 INFO L226 Difference]: Without dead ends: 5199 [2022-03-03 19:18:57,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4793 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1184, Invalid=13822, Unknown=0, NotChecked=0, Total=15006 [2022-03-03 19:18:57,681 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 283 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 6463 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 6635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 6463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:18:57,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1481 Invalid, 6635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 6463 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:18:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2022-03-03 19:18:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 3010. [2022-03-03 19:18:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.893320039880359) internal successors, (11715), 3009 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:18:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 11715 transitions. [2022-03-03 19:18:57,737 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 11715 transitions. Word has length 23 [2022-03-03 19:18:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:18:57,737 INFO L470 AbstractCegarLoop]: Abstraction has 3010 states and 11715 transitions. [2022-03-03 19:18:57,738 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) [2022-03-03 19:18:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 11715 transitions. [2022-03-03 19:18:57,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:18:57,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:18:57,742 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] [2022-03-03 19:18:57,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-03-03 19:18:57,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:57,947 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:18:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:18:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1438999053, now seen corresponding path program 309 times [2022-03-03 19:18:57,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:18:57,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896468560] [2022-03-03 19:18:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:18:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:18:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:18:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:18:58,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:18:58,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896468560] [2022-03-03 19:18:58,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896468560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:18:58,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258150311] [2022-03-03 19:18:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:18:58,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:18:58,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:18:58,111 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) [2022-03-03 19:18:58,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-03 19:18:58,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:18:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:18:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:18:58,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:18:58,527 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 136 treesize of output 120 [2022-03-03 19:18:58,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:18:58,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:18:58,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:18:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:58,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:18:59,127 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 308 treesize of output 264 [2022-03-03 19:18:59,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:18:59,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 345 treesize of output 303 [2022-03-03 19:18:59,511 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 268 treesize of output 236 [2022-03-03 19:18:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:18:59,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258150311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:18:59,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:18:59,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-03-03 19:18:59,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426332876] [2022-03-03 19:18:59,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:18:59,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:18:59,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:18:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:18:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:18:59,690 INFO L87 Difference]: Start difference. First operand 3010 states and 11715 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:00,319 INFO L93 Difference]: Finished difference Result 3803 states and 14195 transitions. [2022-03-03 19:19:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:19:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:19:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:00,327 INFO L225 Difference]: With dead ends: 3803 [2022-03-03 19:19:00,327 INFO L226 Difference]: Without dead ends: 3749 [2022-03-03 19:19:00,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:19:00,328 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:00,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 486 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1442 Invalid, 0 Unknown, 251 Unchecked, 0.4s Time] [2022-03-03 19:19:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-03-03 19:19:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3031. [2022-03-03 19:19:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 3.89009900990099) internal successors, (11787), 3030 states have internal predecessors, (11787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 11787 transitions. [2022-03-03 19:19:00,380 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 11787 transitions. Word has length 23 [2022-03-03 19:19:00,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:00,380 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 11787 transitions. [2022-03-03 19:19:00,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:00,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 11787 transitions. [2022-03-03 19:19:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:00,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:00,386 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] [2022-03-03 19:19:00,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:00,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-03-03 19:19:00,603 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 958946091, now seen corresponding path program 310 times [2022-03-03 19:19:00,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:00,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174236635] [2022-03-03 19:19:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:00,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:00,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174236635] [2022-03-03 19:19:00,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174236635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:00,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939168747] [2022-03-03 19:19:00,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:19:00,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:00,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:00,694 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) [2022-03-03 19:19:00,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-03 19:19:01,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:19:01,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:01,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:19:01,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:01,158 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 183 treesize of output 165 [2022-03-03 19:19:01,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-03 19:19:01,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:19:01,601 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 126 [2022-03-03 19:19:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:01,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:02,029 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 188 treesize of output 164 [2022-03-03 19:19:02,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-03 19:19:02,307 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:19:02,307 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 171 treesize of output 152 [2022-03-03 19:19:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:02,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939168747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:02,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:02,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:19:02,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452178104] [2022-03-03 19:19:02,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:02,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:19:02,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:19:02,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:19:02,485 INFO L87 Difference]: Start difference. First operand 3031 states and 11787 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:02,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:02,877 INFO L93 Difference]: Finished difference Result 3874 states and 14532 transitions. [2022-03-03 19:19:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:19:02,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:19:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:02,885 INFO L225 Difference]: With dead ends: 3874 [2022-03-03 19:19:02,885 INFO L226 Difference]: Without dead ends: 3729 [2022-03-03 19:19:02,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:19:02,886 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:02,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 330 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 623 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-03-03 19:19:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-03-03 19:19:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3112. [2022-03-03 19:19:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3111 states have (on average 3.863066538090646) internal successors, (12018), 3111 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 12018 transitions. [2022-03-03 19:19:02,934 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 12018 transitions. Word has length 23 [2022-03-03 19:19:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:02,934 INFO L470 AbstractCegarLoop]: Abstraction has 3112 states and 12018 transitions. [2022-03-03 19:19:02,934 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) [2022-03-03 19:19:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 12018 transitions. [2022-03-03 19:19:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:02,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:02,939 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] [2022-03-03 19:19:02,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-03 19:19:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2022-03-03 19:19:03,155 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:03,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1147838029, now seen corresponding path program 311 times [2022-03-03 19:19:03,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:03,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402783909] [2022-03-03 19:19:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:03,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:03,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402783909] [2022-03-03 19:19:03,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402783909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:03,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567180637] [2022-03-03 19:19:03,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:19:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:03,360 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) [2022-03-03 19:19:03,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-03 19:19:03,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:19:03,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:19:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:04,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:19:04,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 183 [2022-03-03 19:19:05,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 274 [2022-03-03 19:19:05,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:19:05,327 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 238 [2022-03-03 19:19:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:05,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:06,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:06,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 367 [2022-03-03 19:19:07,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:07,575 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 296 treesize of output 272 [2022-03-03 19:19:07,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:07,582 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 268 treesize of output 248 [2022-03-03 19:19:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:08,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567180637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:08,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:08,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-03 19:19:08,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431595027] [2022-03-03 19:19:08,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:08,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:19:08,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:08,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:19:08,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:19:08,027 INFO L87 Difference]: Start difference. First operand 3112 states and 12018 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:11,935 INFO L93 Difference]: Finished difference Result 4950 states and 17619 transitions. [2022-03-03 19:19:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:19:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:19:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:11,944 INFO L225 Difference]: With dead ends: 4950 [2022-03-03 19:19:11,944 INFO L226 Difference]: Without dead ends: 4905 [2022-03-03 19:19:11,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=564, Invalid=5598, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:19:11,944 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 253 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 3461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1053 Invalid, 3461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3134 Invalid, 0 Unknown, 256 Unchecked, 1.1s Time] [2022-03-03 19:19:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2022-03-03 19:19:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 3317. [2022-03-03 19:19:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 3.8917370325693605) internal successors, (12905), 3316 states have internal predecessors, (12905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 12905 transitions. [2022-03-03 19:19:11,996 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 12905 transitions. Word has length 23 [2022-03-03 19:19:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:11,996 INFO L470 AbstractCegarLoop]: Abstraction has 3317 states and 12905 transitions. [2022-03-03 19:19:11,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 12905 transitions. [2022-03-03 19:19:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:12,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:12,001 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] [2022-03-03 19:19:12,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-03-03 19:19:12,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:12,215 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2072215047, now seen corresponding path program 312 times [2022-03-03 19:19:12,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:12,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130471071] [2022-03-03 19:19:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:12,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:12,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130471071] [2022-03-03 19:19:12,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130471071] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:12,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768175414] [2022-03-03 19:19:12,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:19:12,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:12,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:12,390 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) [2022-03-03 19:19:12,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-03 19:19:12,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:19:12,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:19:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:12,886 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 181 treesize of output 163 [2022-03-03 19:19:13,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:19:13,080 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 184 treesize of output 158 [2022-03-03 19:19:13,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 127 [2022-03-03 19:19:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:19:13,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:13,567 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 197 treesize of output 173 [2022-03-03 19:19:13,795 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 188 treesize of output 164 [2022-03-03 19:19:13,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:13,801 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 182 treesize of output 168 [2022-03-03 19:19:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:19:14,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768175414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:14,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:14,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:19:14,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317017430] [2022-03-03 19:19:14,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:14,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:19:14,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:19:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:19:14,006 INFO L87 Difference]: Start difference. First operand 3317 states and 12905 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:18,832 INFO L93 Difference]: Finished difference Result 5095 states and 18370 transitions. [2022-03-03 19:19:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:19:18,832 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:19:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:18,842 INFO L225 Difference]: With dead ends: 5095 [2022-03-03 19:19:18,842 INFO L226 Difference]: Without dead ends: 4887 [2022-03-03 19:19:18,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1041, Invalid=8661, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 19:19:18,843 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 311 mSDsluCounter, 1968 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:18,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 916 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3521 Invalid, 0 Unknown, 232 Unchecked, 1.2s Time] [2022-03-03 19:19:18,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4887 states. [2022-03-03 19:19:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4887 to 3376. [2022-03-03 19:19:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 3.9114074074074074) internal successors, (13201), 3375 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 13201 transitions. [2022-03-03 19:19:18,919 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 13201 transitions. Word has length 23 [2022-03-03 19:19:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:18,919 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 13201 transitions. [2022-03-03 19:19:18,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:18,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 13201 transitions. [2022-03-03 19:19:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:18,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:18,924 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] [2022-03-03 19:19:18,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:19,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:19,139 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1424260133, now seen corresponding path program 313 times [2022-03-03 19:19:19,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:19,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58797968] [2022-03-03 19:19:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:19,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:19,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58797968] [2022-03-03 19:19:19,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58797968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:19,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485515762] [2022-03-03 19:19:19,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:19:19,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:19,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:19,353 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) [2022-03-03 19:19:19,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-03 19:19:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:19:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:19,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-03 19:19:20,062 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 128 treesize of output 112 [2022-03-03 19:19:20,064 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 142 treesize of output 124 [2022-03-03 19:19:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:20,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:19:20,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:20,812 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 206 treesize of output 188 [2022-03-03 19:19:20,816 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 177 treesize of output 157 [2022-03-03 19:19:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:21,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485515762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:21,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:21,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-03 19:19:21,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034794086] [2022-03-03 19:19:21,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:21,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:19:21,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:21,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:19:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:19:21,044 INFO L87 Difference]: Start difference. First operand 3376 states and 13201 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:24,926 INFO L93 Difference]: Finished difference Result 5003 states and 17919 transitions. [2022-03-03 19:19:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:19:24,926 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 [2022-03-03 19:19:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:24,935 INFO L225 Difference]: With dead ends: 5003 [2022-03-03 19:19:24,935 INFO L226 Difference]: Without dead ends: 4794 [2022-03-03 19:19:24,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=682, Invalid=7508, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:19:24,936 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 240 mSDsluCounter, 2169 mSDsCounter, 0 mSdLazyCounter, 3620 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 3746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 3620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:24,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 1256 Invalid, 3746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 3620 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:19:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4794 states. [2022-03-03 19:19:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4794 to 3425. [2022-03-03 19:19:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 3.9091705607476634) internal successors, (13385), 3424 states have internal predecessors, (13385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13385 transitions. [2022-03-03 19:19:24,992 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13385 transitions. Word has length 23 [2022-03-03 19:19:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:24,992 INFO L470 AbstractCegarLoop]: Abstraction has 3425 states and 13385 transitions. [2022-03-03 19:19:24,992 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) [2022-03-03 19:19:24,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13385 transitions. [2022-03-03 19:19:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:24,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:24,997 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] [2022-03-03 19:19:25,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-03-03 19:19:25,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-03-03 19:19:25,214 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:25,215 INFO L85 PathProgramCache]: Analyzing trace with hash 970057749, now seen corresponding path program 314 times [2022-03-03 19:19:25,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:25,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484842035] [2022-03-03 19:19:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:25,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:19:25,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:25,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484842035] [2022-03-03 19:19:25,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484842035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:25,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531557870] [2022-03-03 19:19:25,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:19:25,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:25,303 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) [2022-03-03 19:19:25,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-03 19:19:25,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:19:25,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:19:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:25,745 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 165 treesize of output 147 [2022-03-03 19:19:25,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 112 [2022-03-03 19:19:25,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:19:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:19:26,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:26,256 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 171 treesize of output 151 [2022-03-03 19:19:26,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:26,515 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 195 treesize of output 177 [2022-03-03 19:19:26,519 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 168 treesize of output 148 [2022-03-03 19:19:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:19:26,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531557870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:26,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:26,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:19:26,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289915431] [2022-03-03 19:19:26,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:26,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:19:26,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:26,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:19:26,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:19:26,667 INFO L87 Difference]: Start difference. First operand 3425 states and 13385 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:29,402 INFO L93 Difference]: Finished difference Result 5460 states and 19607 transitions. [2022-03-03 19:19:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:19:29,402 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 [2022-03-03 19:19:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:29,430 INFO L225 Difference]: With dead ends: 5460 [2022-03-03 19:19:29,430 INFO L226 Difference]: Without dead ends: 5118 [2022-03-03 19:19:29,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=560, Invalid=6412, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:19:29,431 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 203 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:29,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1048 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:19:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2022-03-03 19:19:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 3488. [2022-03-03 19:19:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3487 states have (on average 3.909377688557499) internal successors, (13632), 3487 states have internal predecessors, (13632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 13632 transitions. [2022-03-03 19:19:29,484 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 13632 transitions. Word has length 23 [2022-03-03 19:19:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:29,484 INFO L470 AbstractCegarLoop]: Abstraction has 3488 states and 13632 transitions. [2022-03-03 19:19:29,484 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) [2022-03-03 19:19:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 13632 transitions. [2022-03-03 19:19:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:29,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:29,489 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] [2022-03-03 19:19:29,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:29,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-03 19:19:29,707 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 926048385, now seen corresponding path program 315 times [2022-03-03 19:19:29,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:29,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696522902] [2022-03-03 19:19:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:19:29,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:29,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696522902] [2022-03-03 19:19:29,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696522902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:29,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099168122] [2022-03-03 19:19:29,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:19:29,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:29,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:29,825 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) [2022-03-03 19:19:29,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-03 19:19:30,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:19:30,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:19:30,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:30,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 196 [2022-03-03 19:19:30,584 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 287 treesize of output 247 [2022-03-03 19:19:30,587 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 236 treesize of output 200 [2022-03-03 19:19:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:30,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:30,973 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 206 treesize of output 186 [2022-03-03 19:19:31,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:31,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 201 [2022-03-03 19:19:31,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-03-03 19:19:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:31,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099168122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:31,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:31,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:19:31,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443574933] [2022-03-03 19:19:31,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:31,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:19:31,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:19:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:19:31,381 INFO L87 Difference]: Start difference. First operand 3488 states and 13632 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:38,159 INFO L93 Difference]: Finished difference Result 5924 states and 21186 transitions. [2022-03-03 19:19:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-03 19:19:38,159 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 [2022-03-03 19:19:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:38,169 INFO L225 Difference]: With dead ends: 5924 [2022-03-03 19:19:38,169 INFO L226 Difference]: Without dead ends: 5135 [2022-03-03 19:19:38,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7778 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1821, Invalid=20529, Unknown=0, NotChecked=0, Total=22350 [2022-03-03 19:19:38,170 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 385 mSDsluCounter, 2542 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 5016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:38,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 1460 Invalid, 5016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:19:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2022-03-03 19:19:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 3591. [2022-03-03 19:19:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3590 states have (on average 3.917548746518106) internal successors, (14064), 3590 states have internal predecessors, (14064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 14064 transitions. [2022-03-03 19:19:38,226 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 14064 transitions. Word has length 23 [2022-03-03 19:19:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 3591 states and 14064 transitions. [2022-03-03 19:19:38,226 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) [2022-03-03 19:19:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 14064 transitions. [2022-03-03 19:19:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:38,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:38,231 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] [2022-03-03 19:19:38,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:38,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-03 19:19:38,437 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1740324309, now seen corresponding path program 316 times [2022-03-03 19:19:38,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:38,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125045875] [2022-03-03 19:19:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:38,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:38,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125045875] [2022-03-03 19:19:38,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125045875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:38,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105734476] [2022-03-03 19:19:38,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:19:38,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:38,599 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) [2022-03-03 19:19:38,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-03 19:19:38,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:19:38,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:38,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:19:38,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:39,081 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 173 treesize of output 155 [2022-03-03 19:19:39,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 168 [2022-03-03 19:19:39,313 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 153 treesize of output 135 [2022-03-03 19:19:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:39,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:39,894 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 275 treesize of output 235 [2022-03-03 19:19:40,108 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 188 treesize of output 164 [2022-03-03 19:19:40,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:40,114 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 181 treesize of output 167 [2022-03-03 19:19:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:40,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105734476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:40,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:40,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-03-03 19:19:40,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570218283] [2022-03-03 19:19:40,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:40,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:19:40,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:40,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:19:40,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:19:40,386 INFO L87 Difference]: Start difference. First operand 3591 states and 14064 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:44,043 INFO L93 Difference]: Finished difference Result 6421 states and 22726 transitions. [2022-03-03 19:19:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 19:19:44,044 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 [2022-03-03 19:19:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:44,056 INFO L225 Difference]: With dead ends: 6421 [2022-03-03 19:19:44,056 INFO L226 Difference]: Without dead ends: 5972 [2022-03-03 19:19:44,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=938, Invalid=12172, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:19:44,057 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 329 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 4721 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 4721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:44,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 1397 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 4721 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:19:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2022-03-03 19:19:44,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 3653. [2022-03-03 19:19:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 3.9345564074479737) internal successors, (14369), 3652 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 14369 transitions. [2022-03-03 19:19:44,144 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 14369 transitions. Word has length 23 [2022-03-03 19:19:44,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:44,144 INFO L470 AbstractCegarLoop]: Abstraction has 3653 states and 14369 transitions. [2022-03-03 19:19:44,144 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) [2022-03-03 19:19:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 14369 transitions. [2022-03-03 19:19:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:44,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:44,151 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] [2022-03-03 19:19:44,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:44,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:44,369 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:44,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1691663467, now seen corresponding path program 317 times [2022-03-03 19:19:44,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:44,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763331374] [2022-03-03 19:19:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:44,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:44,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763331374] [2022-03-03 19:19:44,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763331374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:44,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788978760] [2022-03-03 19:19:44,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:19:44,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:44,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:44,481 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) [2022-03-03 19:19:44,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-03 19:19:44,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:19:44,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:19:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:45,004 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 260 treesize of output 226 [2022-03-03 19:19:45,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:19:45,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:19:45,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:19:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:45,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:46,034 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 241 treesize of output 209 [2022-03-03 19:19:46,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:46,348 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 208 treesize of output 190 [2022-03-03 19:19:46,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-03-03 19:19:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:46,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788978760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:46,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:46,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-03 19:19:46,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48011631] [2022-03-03 19:19:46,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:46,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:19:46,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:19:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:19:46,552 INFO L87 Difference]: Start difference. First operand 3653 states and 14369 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:46,934 INFO L93 Difference]: Finished difference Result 4565 states and 17214 transitions. [2022-03-03 19:19:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:19:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:19:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:46,944 INFO L225 Difference]: With dead ends: 4565 [2022-03-03 19:19:46,944 INFO L226 Difference]: Without dead ends: 4445 [2022-03-03 19:19:46,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:19:46,944 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 133 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:46,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 364 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 933 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-03-03 19:19:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states. [2022-03-03 19:19:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 3777. [2022-03-03 19:19:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 3.9253177966101696) internal successors, (14822), 3776 states have internal predecessors, (14822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 14822 transitions. [2022-03-03 19:19:47,061 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 14822 transitions. Word has length 23 [2022-03-03 19:19:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:47,062 INFO L470 AbstractCegarLoop]: Abstraction has 3777 states and 14822 transitions. [2022-03-03 19:19:47,062 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) [2022-03-03 19:19:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 14822 transitions. [2022-03-03 19:19:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:47,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:47,069 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] [2022-03-03 19:19:47,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:47,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:47,287 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash 937360725, now seen corresponding path program 318 times [2022-03-03 19:19:47,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:47,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821038854] [2022-03-03 19:19:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:47,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:19:47,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:47,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821038854] [2022-03-03 19:19:47,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821038854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:47,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223697219] [2022-03-03 19:19:47,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:19:47,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:47,399 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) [2022-03-03 19:19:47,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-03 19:19:47,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:19:47,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:19:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:19:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:47,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 172 [2022-03-03 19:19:48,054 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 [2022-03-03 19:19:48,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:19:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:48,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:48,390 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 206 treesize of output 186 [2022-03-03 19:19:48,662 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 171 treesize of output 151 [2022-03-03 19:19:48,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:19:48,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 169 [2022-03-03 19:19:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:48,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223697219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:48,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:48,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:19:48,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518420609] [2022-03-03 19:19:48,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:48,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:19:48,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:19:48,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:19:48,763 INFO L87 Difference]: Start difference. First operand 3777 states and 14822 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:19:51,019 INFO L93 Difference]: Finished difference Result 5670 states and 20872 transitions. [2022-03-03 19:19:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:19:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:19:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:19:51,030 INFO L225 Difference]: With dead ends: 5670 [2022-03-03 19:19:51,031 INFO L226 Difference]: Without dead ends: 5490 [2022-03-03 19:19:51,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=571, Invalid=6911, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:19:51,032 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 243 mSDsluCounter, 2213 mSDsCounter, 0 mSdLazyCounter, 3860 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 4002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:19:51,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1127 Invalid, 4002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3860 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:19:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-03-03 19:19:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 3794. [2022-03-03 19:19:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 3.930398101766412) internal successors, (14908), 3793 states have internal predecessors, (14908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 14908 transitions. [2022-03-03 19:19:51,112 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 14908 transitions. Word has length 23 [2022-03-03 19:19:51,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:19:51,112 INFO L470 AbstractCegarLoop]: Abstraction has 3794 states and 14908 transitions. [2022-03-03 19:19:51,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:19:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 14908 transitions. [2022-03-03 19:19:51,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:19:51,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:19:51,118 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] [2022-03-03 19:19:51,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-03-03 19:19:51,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-03-03 19:19:51,336 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:19:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:19:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash -939918963, now seen corresponding path program 319 times [2022-03-03 19:19:51,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:19:51,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571435857] [2022-03-03 19:19:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:19:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:19:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:51,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:19:51,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571435857] [2022-03-03 19:19:51,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571435857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:19:51,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734004464] [2022-03-03 19:19:51,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:19:51,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:19:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:19:51,448 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) [2022-03-03 19:19:51,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-03 19:19:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:19:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:19:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:19:51,921 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 212 treesize of output 192 [2022-03-03 19:19:52,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 195 [2022-03-03 19:19:52,334 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 188 treesize of output 168 [2022-03-03 19:19:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:52,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:19:52,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:19:53,151 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 188 treesize of output 164 [2022-03-03 19:19:53,157 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:19:53,157 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 171 treesize of output 152 [2022-03-03 19:19:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:19:53,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734004464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:19:53,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:19:53,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-03 19:19:53,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919454050] [2022-03-03 19:19:53,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:19:53,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:19:53,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:19:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:19:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:19:53,288 INFO L87 Difference]: Start difference. First operand 3794 states and 14908 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:01,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:01,572 INFO L93 Difference]: Finished difference Result 6728 states and 23809 transitions. [2022-03-03 19:20:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-03 19:20:01,572 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:20:01,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:01,585 INFO L225 Difference]: With dead ends: 6728 [2022-03-03 19:20:01,585 INFO L226 Difference]: Without dead ends: 6277 [2022-03-03 19:20:01,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10117 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2263, Invalid=25793, Unknown=0, NotChecked=0, Total=28056 [2022-03-03 19:20:01,586 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 562 mSDsluCounter, 2514 mSDsCounter, 0 mSdLazyCounter, 4215 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 4459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 4215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:01,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1475 Invalid, 4459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 4215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-03 19:20:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2022-03-03 19:20:01,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 3736. [2022-03-03 19:20:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 3.9552878179384203) internal successors, (14773), 3735 states have internal predecessors, (14773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 14773 transitions. [2022-03-03 19:20:01,689 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 14773 transitions. Word has length 23 [2022-03-03 19:20:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 14773 transitions. [2022-03-03 19:20:01,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 14773 transitions. [2022-03-03 19:20:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:01,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:01,697 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] [2022-03-03 19:20:01,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-03-03 19:20:01,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-03 19:20:01,905 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash 248580775, now seen corresponding path program 320 times [2022-03-03 19:20:01,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:01,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821559784] [2022-03-03 19:20:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:01,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:02,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:02,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821559784] [2022-03-03 19:20:02,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821559784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:02,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472779658] [2022-03-03 19:20:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:20:02,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:02,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:02,052 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) [2022-03-03 19:20:02,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-03 19:20:02,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:20:02,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:02,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:02,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:02,618 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 284 treesize of output 234 [2022-03-03 19:20:02,773 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 128 treesize of output 112 [2022-03-03 19:20:02,774 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 132 [2022-03-03 19:20:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:02,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:03,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 263 [2022-03-03 19:20:03,541 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 239 treesize of output 211 [2022-03-03 19:20:03,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:03,548 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 222 treesize of output 192 [2022-03-03 19:20:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:03,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472779658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:03,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:03,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:20:03,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013907529] [2022-03-03 19:20:03,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:20:03,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:20:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:20:03,781 INFO L87 Difference]: Start difference. First operand 3736 states and 14773 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:09,122 INFO L93 Difference]: Finished difference Result 6809 states and 24120 transitions. [2022-03-03 19:20:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-03 19:20:09,122 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 [2022-03-03 19:20:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:09,135 INFO L225 Difference]: With dead ends: 6809 [2022-03-03 19:20:09,135 INFO L226 Difference]: Without dead ends: 6448 [2022-03-03 19:20:09,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5488 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1425, Invalid=14325, Unknown=0, NotChecked=0, Total=15750 [2022-03-03 19:20:09,136 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 404 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 3683 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 3859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:09,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1094 Invalid, 3859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3683 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-03 19:20:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6448 states. [2022-03-03 19:20:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6448 to 3895. [2022-03-03 19:20:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 3.9871597329224446) internal successors, (15526), 3894 states have internal predecessors, (15526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 15526 transitions. [2022-03-03 19:20:09,212 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 15526 transitions. Word has length 23 [2022-03-03 19:20:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:09,212 INFO L470 AbstractCegarLoop]: Abstraction has 3895 states and 15526 transitions. [2022-03-03 19:20:09,212 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) [2022-03-03 19:20:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 15526 transitions. [2022-03-03 19:20:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:09,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:09,218 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] [2022-03-03 19:20:09,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:09,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-03-03 19:20:09,431 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 875820655, now seen corresponding path program 321 times [2022-03-03 19:20:09,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:09,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972744931] [2022-03-03 19:20:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:09,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:09,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:09,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972744931] [2022-03-03 19:20:09,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972744931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:09,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959057188] [2022-03-03 19:20:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:20:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:09,513 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) [2022-03-03 19:20:09,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-03 19:20:09,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:20:09,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:09,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:09,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 149 [2022-03-03 19:20:10,188 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 190 treesize of output 164 [2022-03-03 19:20:10,190 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 140 treesize of output 126 [2022-03-03 19:20:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:10,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:10,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 151 [2022-03-03 19:20:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 247 [2022-03-03 19:20:10,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:10,641 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 258 treesize of output 220 [2022-03-03 19:20:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:10,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959057188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:10,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:10,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:20:10,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905877459] [2022-03-03 19:20:10,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:10,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:20:10,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:10,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:20:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:20:10,848 INFO L87 Difference]: Start difference. First operand 3895 states and 15526 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:13,780 INFO L93 Difference]: Finished difference Result 5836 states and 21231 transitions. [2022-03-03 19:20:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:20:13,781 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 [2022-03-03 19:20:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:13,792 INFO L225 Difference]: With dead ends: 5836 [2022-03-03 19:20:13,792 INFO L226 Difference]: Without dead ends: 5545 [2022-03-03 19:20:13,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=807, Invalid=8313, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:20:13,793 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 244 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 3824 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:13,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1172 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3824 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:20:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5545 states. [2022-03-03 19:20:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5545 to 3895. [2022-03-03 19:20:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 3.9699537750385208) internal successors, (15459), 3894 states have internal predecessors, (15459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 15459 transitions. [2022-03-03 19:20:13,860 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 15459 transitions. Word has length 23 [2022-03-03 19:20:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:13,860 INFO L470 AbstractCegarLoop]: Abstraction has 3895 states and 15459 transitions. [2022-03-03 19:20:13,860 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) [2022-03-03 19:20:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 15459 transitions. [2022-03-03 19:20:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:13,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:13,866 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] [2022-03-03 19:20:13,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:14,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:14,083 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:14,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1642425667, now seen corresponding path program 322 times [2022-03-03 19:20:14,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:14,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55234028] [2022-03-03 19:20:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:14,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:14,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55234028] [2022-03-03 19:20:14,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55234028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:14,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128111985] [2022-03-03 19:20:14,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:20:14,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:14,200 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) [2022-03-03 19:20:14,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-03 19:20:14,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:20:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:14,675 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 171 treesize of output 153 [2022-03-03 19:20:14,873 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 186 treesize of output 160 [2022-03-03 19:20:14,875 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 136 treesize of output 122 [2022-03-03 19:20:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:14,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:15,121 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 230 treesize of output 210 [2022-03-03 19:20:15,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:15,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 186 [2022-03-03 19:20:15,434 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 177 treesize of output 157 [2022-03-03 19:20:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:15,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128111985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:15,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:15,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-03-03 19:20:15,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525936460] [2022-03-03 19:20:15,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:15,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:20:15,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:20:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:20:15,686 INFO L87 Difference]: Start difference. First operand 3895 states and 15459 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:18,394 INFO L93 Difference]: Finished difference Result 6058 states and 22091 transitions. [2022-03-03 19:20:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:20:18,395 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 [2022-03-03 19:20:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:18,406 INFO L225 Difference]: With dead ends: 6058 [2022-03-03 19:20:18,406 INFO L226 Difference]: Without dead ends: 5795 [2022-03-03 19:20:18,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:20:18,407 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 252 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 4110 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 4211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:18,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1125 Invalid, 4211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4110 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:20:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2022-03-03 19:20:18,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 3953. [2022-03-03 19:20:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 3.98836032388664) internal successors, (15762), 3952 states have internal predecessors, (15762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 15762 transitions. [2022-03-03 19:20:18,500 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 15762 transitions. Word has length 23 [2022-03-03 19:20:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:18,500 INFO L470 AbstractCegarLoop]: Abstraction has 3953 states and 15762 transitions. [2022-03-03 19:20:18,501 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) [2022-03-03 19:20:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 15762 transitions. [2022-03-03 19:20:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:18,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:18,507 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] [2022-03-03 19:20:18,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-03-03 19:20:18,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:18,725 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1699320593, now seen corresponding path program 323 times [2022-03-03 19:20:18,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:18,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628855706] [2022-03-03 19:20:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:18,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:18,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628855706] [2022-03-03 19:20:18,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628855706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:18,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310304701] [2022-03-03 19:20:18,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:20:18,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:18,817 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) [2022-03-03 19:20:18,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-03 19:20:19,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:20:19,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:19,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:19,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:19,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 182 [2022-03-03 19:20:19,469 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 128 treesize of output 112 [2022-03-03 19:20:19,472 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 152 treesize of output 132 [2022-03-03 19:20:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:19,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:20,021 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 241 treesize of output 209 [2022-03-03 19:20:20,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-03-03 19:20:20,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:20,352 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 216 treesize of output 198 [2022-03-03 19:20:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:20,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310304701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:20,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:20,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:20:20,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108589253] [2022-03-03 19:20:20,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:20,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:20:20,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:20:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:20:20,585 INFO L87 Difference]: Start difference. First operand 3953 states and 15762 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:24,687 INFO L93 Difference]: Finished difference Result 7219 states and 25862 transitions. [2022-03-03 19:20:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-03 19:20:24,687 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 [2022-03-03 19:20:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:24,702 INFO L225 Difference]: With dead ends: 7219 [2022-03-03 19:20:24,702 INFO L226 Difference]: Without dead ends: 6877 [2022-03-03 19:20:24,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5572 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1289, Invalid=14967, Unknown=0, NotChecked=0, Total=16256 [2022-03-03 19:20:24,704 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 407 mSDsluCounter, 2450 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 4181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:24,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1328 Invalid, 4181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3970 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:20:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6877 states. [2022-03-03 19:20:24,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6877 to 4089. [2022-03-03 19:20:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4089 states, 4088 states have (on average 4.018101761252447) internal successors, (16426), 4088 states have internal predecessors, (16426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4089 states to 4089 states and 16426 transitions. [2022-03-03 19:20:24,789 INFO L78 Accepts]: Start accepts. Automaton has 4089 states and 16426 transitions. Word has length 23 [2022-03-03 19:20:24,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:24,789 INFO L470 AbstractCegarLoop]: Abstraction has 4089 states and 16426 transitions. [2022-03-03 19:20:24,789 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) [2022-03-03 19:20:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4089 states and 16426 transitions. [2022-03-03 19:20:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:24,796 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:24,796 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] [2022-03-03 19:20:24,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:25,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:25,012 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:25,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1968406823, now seen corresponding path program 324 times [2022-03-03 19:20:25,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:25,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390775924] [2022-03-03 19:20:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:25,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:25,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390775924] [2022-03-03 19:20:25,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390775924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:25,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148013872] [2022-03-03 19:20:25,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:20:25,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:25,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:25,142 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) [2022-03-03 19:20:25,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-03 19:20:25,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:20:25,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:25,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:25,643 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 212 treesize of output 182 [2022-03-03 19:20:25,829 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 128 treesize of output 112 [2022-03-03 19:20:25,831 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 142 treesize of output 124 [2022-03-03 19:20:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:25,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:26,148 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 171 treesize of output 151 [2022-03-03 19:20:26,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:26,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 302 [2022-03-03 19:20:26,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 249 [2022-03-03 19:20:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:26,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148013872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:26,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:26,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:20:26,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703901039] [2022-03-03 19:20:26,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:26,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:20:26,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:20:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:20:26,839 INFO L87 Difference]: Start difference. First operand 4089 states and 16426 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:30,478 INFO L93 Difference]: Finished difference Result 6393 states and 23359 transitions. [2022-03-03 19:20:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-03 19:20:30,478 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 [2022-03-03 19:20:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:30,490 INFO L225 Difference]: With dead ends: 6393 [2022-03-03 19:20:30,491 INFO L226 Difference]: Without dead ends: 6116 [2022-03-03 19:20:30,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=859, Invalid=10483, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:20:30,492 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 271 mSDsluCounter, 2648 mSDsCounter, 0 mSdLazyCounter, 4283 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 4408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 4283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:30,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1414 Invalid, 4408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 4283 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:20:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-03-03 19:20:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 3966. [2022-03-03 19:20:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 3965 states have (on average 3.994199243379571) internal successors, (15837), 3965 states have internal predecessors, (15837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:30,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 15837 transitions. [2022-03-03 19:20:30,565 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 15837 transitions. Word has length 23 [2022-03-03 19:20:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:30,565 INFO L470 AbstractCegarLoop]: Abstraction has 3966 states and 15837 transitions. [2022-03-03 19:20:30,565 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) [2022-03-03 19:20:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 15837 transitions. [2022-03-03 19:20:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:30,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:30,572 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] [2022-03-03 19:20:30,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:30,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-03 19:20:30,789 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1005082803, now seen corresponding path program 325 times [2022-03-03 19:20:30,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:30,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780586395] [2022-03-03 19:20:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:30,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:20:30,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:30,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780586395] [2022-03-03 19:20:30,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780586395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:30,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616899766] [2022-03-03 19:20:30,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:20:30,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:30,869 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) [2022-03-03 19:20:30,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-03 19:20:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:31,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:31,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:31,304 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 173 treesize of output 149 [2022-03-03 19:20:31,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:20:31,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 145 [2022-03-03 19:20:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:20:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:31,968 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 312 treesize of output 276 [2022-03-03 19:20:32,229 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 206 treesize of output 182 [2022-03-03 19:20:32,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:32,243 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 195 treesize of output 181 [2022-03-03 19:20:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:20:32,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616899766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:32,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:32,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:20:32,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975531417] [2022-03-03 19:20:32,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:32,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:20:32,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:20:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:20:32,441 INFO L87 Difference]: Start difference. First operand 3966 states and 15837 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:36,212 INFO L93 Difference]: Finished difference Result 6659 states and 24238 transitions. [2022-03-03 19:20:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-03 19:20:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:20:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:36,227 INFO L225 Difference]: With dead ends: 6659 [2022-03-03 19:20:36,227 INFO L226 Difference]: Without dead ends: 6342 [2022-03-03 19:20:36,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1090, Invalid=12020, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:20:36,228 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 325 mSDsluCounter, 2324 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:36,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 1227 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3974 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:20:36,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6342 states. [2022-03-03 19:20:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6342 to 4023. [2022-03-03 19:20:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4023 states, 4022 states have (on average 4.0) internal successors, (16088), 4022 states have internal predecessors, (16088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4023 states to 4023 states and 16088 transitions. [2022-03-03 19:20:36,306 INFO L78 Accepts]: Start accepts. Automaton has 4023 states and 16088 transitions. Word has length 23 [2022-03-03 19:20:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:36,306 INFO L470 AbstractCegarLoop]: Abstraction has 4023 states and 16088 transitions. [2022-03-03 19:20:36,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4023 states and 16088 transitions. [2022-03-03 19:20:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:36,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:36,313 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] [2022-03-03 19:20:36,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:36,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:36,515 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1896560969, now seen corresponding path program 326 times [2022-03-03 19:20:36,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:36,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891245742] [2022-03-03 19:20:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:36,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:36,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891245742] [2022-03-03 19:20:36,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891245742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:36,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099201120] [2022-03-03 19:20:36,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:20:36,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:36,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:36,628 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) [2022-03-03 19:20:36,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-03 19:20:37,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:20:37,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:37,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:37,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:37,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 199 [2022-03-03 19:20:37,671 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 208 treesize of output 174 [2022-03-03 19:20:37,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:20:37,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 178 [2022-03-03 19:20:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:37,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:38,152 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 295 treesize of output 263 [2022-03-03 19:20:38,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:38,400 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 208 treesize of output 190 [2022-03-03 19:20:38,403 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 179 treesize of output 159 [2022-03-03 19:20:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:38,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099201120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:38,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:38,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-03 19:20:38,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20929797] [2022-03-03 19:20:38,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:38,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:20:38,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:38,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:20:38,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:20:38,557 INFO L87 Difference]: Start difference. First operand 4023 states and 16088 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:38,887 INFO L93 Difference]: Finished difference Result 4708 states and 18305 transitions. [2022-03-03 19:20:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:20:38,887 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 [2022-03-03 19:20:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:38,896 INFO L225 Difference]: With dead ends: 4708 [2022-03-03 19:20:38,896 INFO L226 Difference]: Without dead ends: 4641 [2022-03-03 19:20:38,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:20:38,896 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:38,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 243 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 620 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-03 19:20:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2022-03-03 19:20:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4049. [2022-03-03 19:20:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 4048 states have (on average 3.998764822134387) internal successors, (16187), 4048 states have internal predecessors, (16187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 16187 transitions. [2022-03-03 19:20:38,958 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 16187 transitions. Word has length 23 [2022-03-03 19:20:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:38,958 INFO L470 AbstractCegarLoop]: Abstraction has 4049 states and 16187 transitions. [2022-03-03 19:20:38,958 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) [2022-03-03 19:20:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 16187 transitions. [2022-03-03 19:20:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:38,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:38,964 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] [2022-03-03 19:20:38,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:39,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-03-03 19:20:39,182 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:39,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 708463423, now seen corresponding path program 327 times [2022-03-03 19:20:39,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:39,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247516392] [2022-03-03 19:20:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:39,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:39,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247516392] [2022-03-03 19:20:39,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247516392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:39,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875019667] [2022-03-03 19:20:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:20:39,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:39,394 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) [2022-03-03 19:20:39,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-03 19:20:39,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:20:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:39,869 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 181 treesize of output 163 [2022-03-03 19:20:40,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 178 [2022-03-03 19:20:40,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:20:40,215 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 182 [2022-03-03 19:20:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:40,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:40,508 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 142 treesize of output 126 [2022-03-03 19:20:40,741 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 [2022-03-03 19:20:40,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:40,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 163 [2022-03-03 19:20:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:40,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875019667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:40,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:40,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:20:40,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532735829] [2022-03-03 19:20:40,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:40,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:20:40,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:40,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:20:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:20:40,936 INFO L87 Difference]: Start difference. First operand 4049 states and 16187 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:42,009 INFO L93 Difference]: Finished difference Result 4870 states and 18767 transitions. [2022-03-03 19:20:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:20:42,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:20:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:42,020 INFO L225 Difference]: With dead ends: 4870 [2022-03-03 19:20:42,020 INFO L226 Difference]: Without dead ends: 4798 [2022-03-03 19:20:42,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=236, Invalid=2116, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:20:42,021 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 139 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:42,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 524 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1344 Invalid, 0 Unknown, 534 Unchecked, 0.4s Time] [2022-03-03 19:20:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2022-03-03 19:20:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4047. [2022-03-03 19:20:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 4.002718734552644) internal successors, (16195), 4046 states have internal predecessors, (16195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 16195 transitions. [2022-03-03 19:20:42,097 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 16195 transitions. Word has length 23 [2022-03-03 19:20:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:42,097 INFO L470 AbstractCegarLoop]: Abstraction has 4047 states and 16195 transitions. [2022-03-03 19:20:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 16195 transitions. [2022-03-03 19:20:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:42,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:42,104 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] [2022-03-03 19:20:42,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-03-03 19:20:42,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-03 19:20:42,322 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:42,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:42,323 INFO L85 PathProgramCache]: Analyzing trace with hash 897910989, now seen corresponding path program 328 times [2022-03-03 19:20:42,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:42,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314726068] [2022-03-03 19:20:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:42,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:42,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:42,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314726068] [2022-03-03 19:20:42,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314726068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:42,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451260301] [2022-03-03 19:20:42,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:20:42,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:42,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:42,408 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) [2022-03-03 19:20:42,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-03 19:20:42,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:20:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:42,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:42,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:42,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-03 19:20:43,232 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 128 treesize of output 112 [2022-03-03 19:20:43,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:20:43,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:20:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:43,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:43,653 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 356 treesize of output 320 [2022-03-03 19:20:43,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:43,939 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 234 [2022-03-03 19:20:43,943 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 223 treesize of output 199 [2022-03-03 19:20:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:44,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451260301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:44,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:44,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:20:44,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662229403] [2022-03-03 19:20:44,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:44,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:20:44,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:20:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:20:44,119 INFO L87 Difference]: Start difference. First operand 4047 states and 16195 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:44,306 INFO L93 Difference]: Finished difference Result 4675 states and 18211 transitions. [2022-03-03 19:20:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:20:44,306 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 [2022-03-03 19:20:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:44,315 INFO L225 Difference]: With dead ends: 4675 [2022-03-03 19:20:44,315 INFO L226 Difference]: Without dead ends: 4630 [2022-03-03 19:20:44,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:20:44,316 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:44,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 198 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 534 Invalid, 0 Unknown, 207 Unchecked, 0.1s Time] [2022-03-03 19:20:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2022-03-03 19:20:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 4014. [2022-03-03 19:20:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 3.9997508098679293) internal successors, (16051), 4013 states have internal predecessors, (16051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 16051 transitions. [2022-03-03 19:20:44,391 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 16051 transitions. Word has length 23 [2022-03-03 19:20:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:44,391 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 16051 transitions. [2022-03-03 19:20:44,391 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) [2022-03-03 19:20:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 16051 transitions. [2022-03-03 19:20:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:44,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:44,397 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] [2022-03-03 19:20:44,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:44,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-03-03 19:20:44,611 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:44,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1797170175, now seen corresponding path program 329 times [2022-03-03 19:20:44,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:44,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116307508] [2022-03-03 19:20:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:44,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:44,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116307508] [2022-03-03 19:20:44,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116307508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:44,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986384134] [2022-03-03 19:20:44,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:20:44,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:44,785 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) [2022-03-03 19:20:44,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-03 19:20:45,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:20:45,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:45,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:45,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 254 [2022-03-03 19:20:45,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:20:45,664 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 177 [2022-03-03 19:20:45,689 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 144 treesize of output 130 [2022-03-03 19:20:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:46,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:46,368 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 222 treesize of output 190 [2022-03-03 19:20:46,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:20:46,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:46,623 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 140 [2022-03-03 19:20:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:47,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986384134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:47,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:47,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-03 19:20:47,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623189972] [2022-03-03 19:20:47,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:47,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:20:47,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:20:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:20:47,037 INFO L87 Difference]: Start difference. First operand 4014 states and 16051 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:47,698 INFO L93 Difference]: Finished difference Result 5197 states and 20041 transitions. [2022-03-03 19:20:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:20:47,698 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 [2022-03-03 19:20:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:47,710 INFO L225 Difference]: With dead ends: 5197 [2022-03-03 19:20:47,710 INFO L226 Difference]: Without dead ends: 5024 [2022-03-03 19:20:47,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:20:47,710 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 215 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:47,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 277 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 753 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-03-03 19:20:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2022-03-03 19:20:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 4139. [2022-03-03 19:20:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 4.036732721121314) internal successors, (16704), 4138 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 16704 transitions. [2022-03-03 19:20:47,817 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 16704 transitions. Word has length 23 [2022-03-03 19:20:47,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:47,817 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 16704 transitions. [2022-03-03 19:20:47,817 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) [2022-03-03 19:20:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 16704 transitions. [2022-03-03 19:20:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:47,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:47,825 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] [2022-03-03 19:20:47,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:48,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:48,035 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:48,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:48,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1154064981, now seen corresponding path program 330 times [2022-03-03 19:20:48,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:48,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332004313] [2022-03-03 19:20:48,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:48,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:48,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:48,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332004313] [2022-03-03 19:20:48,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332004313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:48,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99666498] [2022-03-03 19:20:48,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:20:48,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:48,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:48,160 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) [2022-03-03 19:20:48,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-03 19:20:48,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:20:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:48,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-03 19:20:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:48,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:20:48,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 229 [2022-03-03 19:20:48,965 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 241 treesize of output 209 [2022-03-03 19:20:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:49,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:49,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 228 [2022-03-03 19:20:49,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:49,800 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 220 treesize of output 202 [2022-03-03 19:20:49,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:20:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:50,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99666498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:50,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:50,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-03 19:20:50,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706059340] [2022-03-03 19:20:50,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:50,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:20:50,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:20:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:20:50,015 INFO L87 Difference]: Start difference. First operand 4139 states and 16704 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:53,094 INFO L93 Difference]: Finished difference Result 6355 states and 23374 transitions. [2022-03-03 19:20:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-03 19:20:53,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:20:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:53,107 INFO L225 Difference]: With dead ends: 6355 [2022-03-03 19:20:53,107 INFO L226 Difference]: Without dead ends: 6015 [2022-03-03 19:20:53,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=811, Invalid=6671, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:20:53,108 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 416 mSDsluCounter, 1329 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 2209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:53,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 725 Invalid, 2209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:20:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2022-03-03 19:20:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 4198. [2022-03-03 19:20:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4197 states have (on average 4.047891350964975) internal successors, (16989), 4197 states have internal predecessors, (16989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 16989 transitions. [2022-03-03 19:20:53,184 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 16989 transitions. Word has length 23 [2022-03-03 19:20:53,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:53,184 INFO L470 AbstractCegarLoop]: Abstraction has 4198 states and 16989 transitions. [2022-03-03 19:20:53,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 16989 transitions. [2022-03-03 19:20:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:20:53,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:53,191 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] [2022-03-03 19:20:53,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-03-03 19:20:53,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:53,409 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 119936981, now seen corresponding path program 331 times [2022-03-03 19:20:53,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:53,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890763579] [2022-03-03 19:20:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:53,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:53,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:53,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890763579] [2022-03-03 19:20:53,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890763579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:53,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372148132] [2022-03-03 19:20:53,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:20:53,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:53,528 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) [2022-03-03 19:20:53,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-03 19:20:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:20:53,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:54,103 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 269 treesize of output 233 [2022-03-03 19:20:54,330 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 208 treesize of output 174 [2022-03-03 19:20:54,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 176 [2022-03-03 19:20:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:54,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:54,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 272 [2022-03-03 19:20:54,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:20:54,962 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 265 treesize of output 235 [2022-03-03 19:20:54,966 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 226 treesize of output 194 [2022-03-03 19:20:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:20:55,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372148132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:20:55,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:20:55,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-03-03 19:20:55,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11038648] [2022-03-03 19:20:55,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:20:55,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:20:55,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:20:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:20:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:20:55,188 INFO L87 Difference]: Start difference. First operand 4198 states and 16989 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:20:58,963 INFO L93 Difference]: Finished difference Result 5965 states and 22141 transitions. [2022-03-03 19:20:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-03 19:20:58,963 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 [2022-03-03 19:20:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:20:58,974 INFO L225 Difference]: With dead ends: 5965 [2022-03-03 19:20:58,975 INFO L226 Difference]: Without dead ends: 5772 [2022-03-03 19:20:58,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=992, Invalid=10350, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:20:58,976 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 361 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:20:58,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 880 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:20:58,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2022-03-03 19:20:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4109. [2022-03-03 19:20:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 4.05111976630964) internal successors, (16642), 4108 states have internal predecessors, (16642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:20:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 16642 transitions. [2022-03-03 19:20:59,047 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 16642 transitions. Word has length 23 [2022-03-03 19:20:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:20:59,047 INFO L470 AbstractCegarLoop]: Abstraction has 4109 states and 16642 transitions. [2022-03-03 19:20:59,047 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) [2022-03-03 19:20:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 16642 transitions. [2022-03-03 19:20:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:20:59,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:20:59,053 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:20:59,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-03 19:20:59,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:59,269 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:20:59,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:20:59,269 INFO L85 PathProgramCache]: Analyzing trace with hash -868338267, now seen corresponding path program 332 times [2022-03-03 19:20:59,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:20:59,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999118819] [2022-03-03 19:20:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:20:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:20:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:20:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:20:59,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:20:59,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999118819] [2022-03-03 19:20:59,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999118819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:20:59,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256150759] [2022-03-03 19:20:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:20:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:20:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:20:59,356 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) [2022-03-03 19:20:59,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-03 19:20:59,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:20:59,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:20:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:20:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:20:59,742 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 17 treesize of output 13 [2022-03-03 19:20:59,796 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 32 treesize of output 24 [2022-03-03 19:20:59,798 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 4 treesize of output 2 [2022-03-03 19:20:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:20:59,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:20:59,914 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 159 treesize of output 139 [2022-03-03 19:21:00,130 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:00,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:21:00,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:21:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:00,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256150759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:00,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:00,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2022-03-03 19:21:00,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058942848] [2022-03-03 19:21:00,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:00,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:21:00,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:21:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:21:00,139 INFO L87 Difference]: Start difference. First operand 4109 states and 16642 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:00,577 INFO L93 Difference]: Finished difference Result 4745 states and 18761 transitions. [2022-03-03 19:21:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:21:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:00,588 INFO L225 Difference]: With dead ends: 4745 [2022-03-03 19:21:00,588 INFO L226 Difference]: Without dead ends: 4648 [2022-03-03 19:21:00,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:21:00,588 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 119 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:00,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 261 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2022-03-03 19:21:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 4121. [2022-03-03 19:21:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4121 states, 4120 states have (on average 4.059223300970873) internal successors, (16724), 4120 states have internal predecessors, (16724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4121 states to 4121 states and 16724 transitions. [2022-03-03 19:21:00,652 INFO L78 Accepts]: Start accepts. Automaton has 4121 states and 16724 transitions. Word has length 24 [2022-03-03 19:21:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:00,652 INFO L470 AbstractCegarLoop]: Abstraction has 4121 states and 16724 transitions. [2022-03-03 19:21:00,652 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) [2022-03-03 19:21:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4121 states and 16724 transitions. [2022-03-03 19:21:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:00,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:00,658 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:00,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-03-03 19:21:00,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:00,871 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:00,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1930997963, now seen corresponding path program 333 times [2022-03-03 19:21:00,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:00,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697213322] [2022-03-03 19:21:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:00,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:00,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:00,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697213322] [2022-03-03 19:21:00,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697213322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:00,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395042961] [2022-03-03 19:21:00,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:21:00,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:00,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:00,978 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) [2022-03-03 19:21:00,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-03 19:21:01,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:21:01,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:01,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:21:01,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-03 19:21:01,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-03-03 19:21:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:01,735 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 188 treesize of output 164 [2022-03-03 19:21:02,044 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:02,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:21:02,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:21:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:02,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395042961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:02,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:02,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-03-03 19:21:02,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370441668] [2022-03-03 19:21:02,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:02,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-03 19:21:02,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-03 19:21:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-03 19:21:02,054 INFO L87 Difference]: Start difference. First operand 4121 states and 16724 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:02,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:02,492 INFO L93 Difference]: Finished difference Result 4772 states and 18853 transitions. [2022-03-03 19:21:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:21:02,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:02,502 INFO L225 Difference]: With dead ends: 4772 [2022-03-03 19:21:02,502 INFO L226 Difference]: Without dead ends: 4675 [2022-03-03 19:21:02,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:21:02,503 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 120 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:02,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 290 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2022-03-03 19:21:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4142. [2022-03-03 19:21:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4142 states, 4141 states have (on average 4.05964742815745) internal successors, (16811), 4141 states have internal predecessors, (16811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4142 states to 4142 states and 16811 transitions. [2022-03-03 19:21:02,572 INFO L78 Accepts]: Start accepts. Automaton has 4142 states and 16811 transitions. Word has length 24 [2022-03-03 19:21:02,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:02,572 INFO L470 AbstractCegarLoop]: Abstraction has 4142 states and 16811 transitions. [2022-03-03 19:21:02,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4142 states and 16811 transitions. [2022-03-03 19:21:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:02,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:02,579 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:02,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:02,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:02,797 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:02,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:02,797 INFO L85 PathProgramCache]: Analyzing trace with hash 149473633, now seen corresponding path program 334 times [2022-03-03 19:21:02,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:02,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620568789] [2022-03-03 19:21:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:02,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:02,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620568789] [2022-03-03 19:21:02,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620568789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:02,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219301100] [2022-03-03 19:21:02,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:21:02,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:02,895 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) [2022-03-03 19:21:02,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-03 19:21:03,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:21:03,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:03,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:03,399 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 17 treesize of output 13 [2022-03-03 19:21:03,504 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 32 treesize of output 24 [2022-03-03 19:21:03,506 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 4 treesize of output 2 [2022-03-03 19:21:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:03,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:03,687 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 199 treesize of output 179 [2022-03-03 19:21:03,880 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:03,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:21:03,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:21:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:03,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219301100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:03,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:03,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-03 19:21:03,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870958961] [2022-03-03 19:21:03,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:03,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:21:03,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:21:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:21:03,889 INFO L87 Difference]: Start difference. First operand 4142 states and 16811 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:04,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:04,280 INFO L93 Difference]: Finished difference Result 4815 states and 18990 transitions. [2022-03-03 19:21:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:21:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:04,289 INFO L225 Difference]: With dead ends: 4815 [2022-03-03 19:21:04,289 INFO L226 Difference]: Without dead ends: 4722 [2022-03-03 19:21:04,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:21:04,289 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 122 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:04,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 302 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2022-03-03 19:21:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 4169. [2022-03-03 19:21:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4168 states have (on average 4.061180422264875) internal successors, (16927), 4168 states have internal predecessors, (16927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:04,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 16927 transitions. [2022-03-03 19:21:04,377 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 16927 transitions. Word has length 24 [2022-03-03 19:21:04,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:04,377 INFO L470 AbstractCegarLoop]: Abstraction has 4169 states and 16927 transitions. [2022-03-03 19:21:04,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:04,377 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 16927 transitions. [2022-03-03 19:21:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:04,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:04,383 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:04,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-03-03 19:21:04,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:04,601 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:04,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:04,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1324964277, now seen corresponding path program 335 times [2022-03-03 19:21:04,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:04,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378831448] [2022-03-03 19:21:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:04,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:04,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378831448] [2022-03-03 19:21:04,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378831448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:04,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206116896] [2022-03-03 19:21:04,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:21:04,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:04,691 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) [2022-03-03 19:21:04,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-03 19:21:05,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:21:05,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:05,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:05,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:21:05,225 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 218 treesize of output 186 [2022-03-03 19:21:05,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-03-03 19:21:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:05,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:05,477 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 199 treesize of output 179 [2022-03-03 19:21:05,699 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:05,700 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 8 treesize of output 7 [2022-03-03 19:21:05,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:21:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:05,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206116896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:05,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:05,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-03 19:21:05,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819164261] [2022-03-03 19:21:05,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:05,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:21:05,708 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:05,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:21:05,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:21:05,709 INFO L87 Difference]: Start difference. First operand 4169 states and 16927 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:06,149 INFO L93 Difference]: Finished difference Result 5081 states and 19802 transitions. [2022-03-03 19:21:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:21:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:06,159 INFO L225 Difference]: With dead ends: 5081 [2022-03-03 19:21:06,159 INFO L226 Difference]: Without dead ends: 4988 [2022-03-03 19:21:06,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:21:06,159 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:06,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 306 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2022-03-03 19:21:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4130. [2022-03-03 19:21:06,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 4129 states have (on average 4.056672317752483) internal successors, (16750), 4129 states have internal predecessors, (16750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 16750 transitions. [2022-03-03 19:21:06,222 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 16750 transitions. Word has length 24 [2022-03-03 19:21:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:06,222 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 16750 transitions. [2022-03-03 19:21:06,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 16750 transitions. [2022-03-03 19:21:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:06,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:06,228 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:06,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:06,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:06,444 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1356436285, now seen corresponding path program 336 times [2022-03-03 19:21:06,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:06,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771959553] [2022-03-03 19:21:06,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:06,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:06,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:06,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771959553] [2022-03-03 19:21:06,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771959553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:06,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021037123] [2022-03-03 19:21:06,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:21:06,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:06,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:06,560 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) [2022-03-03 19:21:06,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-03 19:21:06,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:21:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:06,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:06,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:06,887 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 17 treesize of output 13 [2022-03-03 19:21:06,994 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 145 treesize of output 125 [2022-03-03 19:21:06,996 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 135 treesize of output 117 [2022-03-03 19:21:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:07,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:07,233 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 188 treesize of output 164 [2022-03-03 19:21:07,420 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:07,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 7 [2022-03-03 19:21:07,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:21:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:07,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021037123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:07,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:07,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-03 19:21:07,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911213525] [2022-03-03 19:21:07,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:07,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:21:07,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:07,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:21:07,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:21:07,429 INFO L87 Difference]: Start difference. First operand 4130 states and 16750 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:07,875 INFO L93 Difference]: Finished difference Result 4903 states and 19107 transitions. [2022-03-03 19:21:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-03 19:21:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:07,885 INFO L225 Difference]: With dead ends: 4903 [2022-03-03 19:21:07,885 INFO L226 Difference]: Without dead ends: 4768 [2022-03-03 19:21:07,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:21:07,885 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:07,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 343 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2022-03-03 19:21:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4093. [2022-03-03 19:21:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 4.0442326490713585) internal successors, (16549), 4092 states have internal predecessors, (16549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 16549 transitions. [2022-03-03 19:21:07,969 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 16549 transitions. Word has length 24 [2022-03-03 19:21:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:07,969 INFO L470 AbstractCegarLoop]: Abstraction has 4093 states and 16549 transitions. [2022-03-03 19:21:07,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 16549 transitions. [2022-03-03 19:21:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:07,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:07,975 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:07,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:08,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-03-03 19:21:08,193 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:08,194 INFO L85 PathProgramCache]: Analyzing trace with hash 102788877, now seen corresponding path program 337 times [2022-03-03 19:21:08,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:08,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803220142] [2022-03-03 19:21:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:21:08,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:08,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803220142] [2022-03-03 19:21:08,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803220142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:08,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070928373] [2022-03-03 19:21:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:21:08,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:08,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:08,274 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) [2022-03-03 19:21:08,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-03 19:21:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:21:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:08,767 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 24 treesize of output 18 [2022-03-03 19:21:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:08,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:08,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-03 19:21:09,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:09,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:21:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:09,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070928373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:09,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:09,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-03 19:21:09,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396196765] [2022-03-03 19:21:09,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:09,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:21:09,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:21:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:21:09,249 INFO L87 Difference]: Start difference. First operand 4093 states and 16549 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:12,691 INFO L93 Difference]: Finished difference Result 8150 states and 30355 transitions. [2022-03-03 19:21:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-03 19:21:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:12,708 INFO L225 Difference]: With dead ends: 8150 [2022-03-03 19:21:12,708 INFO L226 Difference]: Without dead ends: 7734 [2022-03-03 19:21:12,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1109, Invalid=11547, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:21:12,710 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 471 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:12,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1043 Invalid, 4025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:21:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2022-03-03 19:21:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 4574. [2022-03-03 19:21:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.067789197463372) internal successors, (18602), 4573 states have internal predecessors, (18602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 18602 transitions. [2022-03-03 19:21:12,825 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 18602 transitions. Word has length 24 [2022-03-03 19:21:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:12,825 INFO L470 AbstractCegarLoop]: Abstraction has 4574 states and 18602 transitions. [2022-03-03 19:21:12,825 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) [2022-03-03 19:21:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 18602 transitions. [2022-03-03 19:21:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:12,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:12,832 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:12,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-03 19:21:13,050 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:13,050 INFO L85 PathProgramCache]: Analyzing trace with hash 601935470, now seen corresponding path program 338 times [2022-03-03 19:21:13,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:13,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088141829] [2022-03-03 19:21:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:13,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:13,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088141829] [2022-03-03 19:21:13,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088141829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:13,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515119473] [2022-03-03 19:21:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:21:13,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:13,186 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) [2022-03-03 19:21:13,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-03 19:21:13,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:21:13,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:13,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:13,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:13,754 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 239 treesize of output 213 [2022-03-03 19:21:14,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:14,254 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-03-03 19:21:14,257 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 17 treesize of output 13 [2022-03-03 19:21:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:14,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:14,554 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 3 treesize of output 1 [2022-03-03 19:21:14,734 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:14,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:21:14,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:21:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:14,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515119473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:14,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:14,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:21:14,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74451720] [2022-03-03 19:21:14,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:14,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:21:14,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:21:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:21:14,888 INFO L87 Difference]: Start difference. First operand 4574 states and 18602 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:15,107 INFO L93 Difference]: Finished difference Result 5600 states and 22475 transitions. [2022-03-03 19:21:15,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:21:15,107 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:15,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:15,119 INFO L225 Difference]: With dead ends: 5600 [2022-03-03 19:21:15,119 INFO L226 Difference]: Without dead ends: 5490 [2022-03-03 19:21:15,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:21:15,119 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 192 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:15,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 175 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 397 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-03-03 19:21:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5490 states. [2022-03-03 19:21:15,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5490 to 4576. [2022-03-03 19:21:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.060109289617486) internal successors, (18575), 4575 states have internal predecessors, (18575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 18575 transitions. [2022-03-03 19:21:15,214 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 18575 transitions. Word has length 24 [2022-03-03 19:21:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:15,214 INFO L470 AbstractCegarLoop]: Abstraction has 4576 states and 18575 transitions. [2022-03-03 19:21:15,214 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) [2022-03-03 19:21:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 18575 transitions. [2022-03-03 19:21:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:15,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:15,222 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:15,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Ended with exit code 0 [2022-03-03 19:21:15,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-03 19:21:15,435 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash -13157717, now seen corresponding path program 339 times [2022-03-03 19:21:15,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:15,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728555798] [2022-03-03 19:21:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:15,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:15,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728555798] [2022-03-03 19:21:15,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728555798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:15,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8360949] [2022-03-03 19:21:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:21:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:15,568 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) [2022-03-03 19:21:15,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-03 19:21:15,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:21:15,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:15,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:21:15,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:16,232 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 378 treesize of output 310 [2022-03-03 19:21:16,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:16,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:16,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:16,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 173 [2022-03-03 19:21:16,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:16,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8360949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:16,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:16,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-03 19:21:16,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437427534] [2022-03-03 19:21:16,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:16,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:21:16,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:21:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:21:16,833 INFO L87 Difference]: Start difference. First operand 4576 states and 18575 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:20,472 INFO L93 Difference]: Finished difference Result 8274 states and 30374 transitions. [2022-03-03 19:21:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-03 19:21:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:20,487 INFO L225 Difference]: With dead ends: 8274 [2022-03-03 19:21:20,487 INFO L226 Difference]: Without dead ends: 7692 [2022-03-03 19:21:20,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4629 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1147, Invalid=12659, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:21:20,488 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 465 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 3712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:20,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 1117 Invalid, 3712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:21:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7692 states. [2022-03-03 19:21:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7692 to 5086. [2022-03-03 19:21:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 5085 states have (on average 4.058013765978368) internal successors, (20635), 5085 states have internal predecessors, (20635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 20635 transitions. [2022-03-03 19:21:20,594 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 20635 transitions. Word has length 24 [2022-03-03 19:21:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:20,594 INFO L470 AbstractCegarLoop]: Abstraction has 5086 states and 20635 transitions. [2022-03-03 19:21:20,594 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) [2022-03-03 19:21:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 20635 transitions. [2022-03-03 19:21:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:20,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:20,603 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:20,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:20,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:20,820 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1331940599, now seen corresponding path program 340 times [2022-03-03 19:21:20,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:20,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795187126] [2022-03-03 19:21:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:20,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:20,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:20,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795187126] [2022-03-03 19:21:20,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795187126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:20,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779373211] [2022-03-03 19:21:20,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:21:20,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:20,897 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) [2022-03-03 19:21:20,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-03 19:21:21,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:21:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:21:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:21,379 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 24 treesize of output 18 [2022-03-03 19:21:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:21,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:21,554 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 219 [2022-03-03 19:21:21,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:21,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:21:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:21,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779373211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:21,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:21,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-03-03 19:21:21,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815383647] [2022-03-03 19:21:21,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:21,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:21:21,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:21,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:21:21,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:21:21,740 INFO L87 Difference]: Start difference. First operand 5086 states and 20635 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:22,799 INFO L93 Difference]: Finished difference Result 6698 states and 26157 transitions. [2022-03-03 19:21:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:21:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:22,814 INFO L225 Difference]: With dead ends: 6698 [2022-03-03 19:21:22,814 INFO L226 Difference]: Without dead ends: 6468 [2022-03-03 19:21:22,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=426, Invalid=3356, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:21:22,815 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 186 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:22,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 567 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:21:22,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2022-03-03 19:21:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 5369. [2022-03-03 19:21:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5369 states, 5368 states have (on average 4.046385991058123) internal successors, (21721), 5368 states have internal predecessors, (21721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5369 states to 5369 states and 21721 transitions. [2022-03-03 19:21:22,914 INFO L78 Accepts]: Start accepts. Automaton has 5369 states and 21721 transitions. Word has length 24 [2022-03-03 19:21:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:22,914 INFO L470 AbstractCegarLoop]: Abstraction has 5369 states and 21721 transitions. [2022-03-03 19:21:22,915 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) [2022-03-03 19:21:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5369 states and 21721 transitions. [2022-03-03 19:21:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:22,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:22,924 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:22,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:23,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-03-03 19:21:23,142 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 538136127, now seen corresponding path program 341 times [2022-03-03 19:21:23,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:23,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773417430] [2022-03-03 19:21:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:23,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-03 19:21:23,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:23,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773417430] [2022-03-03 19:21:23,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773417430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:23,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291534183] [2022-03-03 19:21:23,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:21:23,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:23,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:23,215 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) [2022-03-03 19:21:23,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-03 19:21:23,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:21:23,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:23,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:21:23,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:23,828 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 309 treesize of output 253 [2022-03-03 19:21:23,830 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 263 treesize of output 233 [2022-03-03 19:21:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:24,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:24,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 203 [2022-03-03 19:21:24,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:24,418 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-03 19:21:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:24,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291534183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:24,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:24,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-03 19:21:24,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107344306] [2022-03-03 19:21:24,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:24,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:21:24,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:21:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:21:24,494 INFO L87 Difference]: Start difference. First operand 5369 states and 21721 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:28,358 INFO L93 Difference]: Finished difference Result 9607 states and 35774 transitions. [2022-03-03 19:21:28,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 19:21:28,358 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:28,378 INFO L225 Difference]: With dead ends: 9607 [2022-03-03 19:21:28,378 INFO L226 Difference]: Without dead ends: 8856 [2022-03-03 19:21:28,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4477 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1180, Invalid=12626, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:21:28,380 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 489 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 3872 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:28,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 1278 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3872 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-03 19:21:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8856 states. [2022-03-03 19:21:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8856 to 5819. [2022-03-03 19:21:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5818 states have (on average 4.121519422481953) internal successors, (23979), 5818 states have internal predecessors, (23979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 23979 transitions. [2022-03-03 19:21:28,523 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 23979 transitions. Word has length 24 [2022-03-03 19:21:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:28,523 INFO L470 AbstractCegarLoop]: Abstraction has 5819 states and 23979 transitions. [2022-03-03 19:21:28,523 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) [2022-03-03 19:21:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 23979 transitions. [2022-03-03 19:21:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:28,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:28,535 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:28,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:28,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-03-03 19:21:28,738 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:28,738 INFO L85 PathProgramCache]: Analyzing trace with hash -833212691, now seen corresponding path program 342 times [2022-03-03 19:21:28,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:28,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712463506] [2022-03-03 19:21:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:28,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:28,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:28,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712463506] [2022-03-03 19:21:28,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712463506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:28,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057143781] [2022-03-03 19:21:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:21:28,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:28,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:28,818 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) [2022-03-03 19:21:28,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-03 19:21:29,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:21:29,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:29,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:21:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:29,316 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 226 treesize of output 198 [2022-03-03 19:21:30,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:30,168 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 333 treesize of output 273 [2022-03-03 19:21:30,171 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 247 treesize of output 223 [2022-03-03 19:21:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:21:30,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:30,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:30,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 325 treesize of output 277 [2022-03-03 19:21:30,912 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:30,912 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 284 treesize of output 249 [2022-03-03 19:21:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-03 19:21:31,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057143781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:31,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:31,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-03 19:21:31,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113763307] [2022-03-03 19:21:31,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:31,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:21:31,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:21:31,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:21:31,110 INFO L87 Difference]: Start difference. First operand 5819 states and 23979 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:32,995 INFO L93 Difference]: Finished difference Result 9121 states and 35756 transitions. [2022-03-03 19:21:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:21:32,996 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:32,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:33,015 INFO L225 Difference]: With dead ends: 9121 [2022-03-03 19:21:33,015 INFO L226 Difference]: Without dead ends: 9064 [2022-03-03 19:21:33,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=713, Invalid=8029, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:21:33,016 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 198 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 4650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:33,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1453 Invalid, 4650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2494 Invalid, 0 Unknown, 2105 Unchecked, 0.6s Time] [2022-03-03 19:21:33,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2022-03-03 19:21:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 5807. [2022-03-03 19:21:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 4.123492938339648) internal successors, (23941), 5806 states have internal predecessors, (23941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 23941 transitions. [2022-03-03 19:21:33,158 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 23941 transitions. Word has length 24 [2022-03-03 19:21:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:33,158 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 23941 transitions. [2022-03-03 19:21:33,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 23941 transitions. [2022-03-03 19:21:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:33,168 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:33,168 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:33,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:33,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:33,386 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1622692589, now seen corresponding path program 343 times [2022-03-03 19:21:33,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:33,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388030685] [2022-03-03 19:21:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:33,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:33,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388030685] [2022-03-03 19:21:33,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388030685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:33,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709341103] [2022-03-03 19:21:33,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:21:33,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:33,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:33,516 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) [2022-03-03 19:21:33,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-03 19:21:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:33,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:21:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:34,026 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 24 treesize of output 18 [2022-03-03 19:21:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:34,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:34,206 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 188 treesize of output 168 [2022-03-03 19:21:34,399 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:34,399 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 8 treesize of output 7 [2022-03-03 19:21:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:34,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709341103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:34,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:34,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-03 19:21:34,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029348160] [2022-03-03 19:21:34,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:21:34,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:21:34,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:21:34,415 INFO L87 Difference]: Start difference. First operand 5807 states and 23941 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:37,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:37,385 INFO L93 Difference]: Finished difference Result 8041 states and 31182 transitions. [2022-03-03 19:21:37,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-03 19:21:37,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:37,403 INFO L225 Difference]: With dead ends: 8041 [2022-03-03 19:21:37,403 INFO L226 Difference]: Without dead ends: 7851 [2022-03-03 19:21:37,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1034, Invalid=7896, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:21:37,404 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 257 mSDsluCounter, 2671 mSDsCounter, 0 mSdLazyCounter, 4269 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 4370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:37,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1275 Invalid, 4370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4269 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-03 19:21:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2022-03-03 19:21:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5711. [2022-03-03 19:21:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5710 states have (on average 4.149036777583188) internal successors, (23691), 5710 states have internal predecessors, (23691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 23691 transitions. [2022-03-03 19:21:37,534 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 23691 transitions. Word has length 24 [2022-03-03 19:21:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:37,534 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 23691 transitions. [2022-03-03 19:21:37,534 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) [2022-03-03 19:21:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 23691 transitions. [2022-03-03 19:21:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:37,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:37,544 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:37,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-03-03 19:21:37,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:37,745 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:37,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1225987054, now seen corresponding path program 344 times [2022-03-03 19:21:37,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:37,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570605321] [2022-03-03 19:21:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:37,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:37,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:37,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570605321] [2022-03-03 19:21:37,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570605321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:37,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601393722] [2022-03-03 19:21:37,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:21:37,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:37,870 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) [2022-03-03 19:21:37,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-03 19:21:38,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:21:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:38,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:38,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:38,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:21:38,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:21:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:38,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:38,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:21:39,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:39,064 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:39,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:21:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:39,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601393722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:39,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:39,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:21:39,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654957924] [2022-03-03 19:21:39,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:39,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:21:39,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:21:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:21:39,181 INFO L87 Difference]: Start difference. First operand 5711 states and 23691 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:39,444 INFO L93 Difference]: Finished difference Result 6771 states and 27535 transitions. [2022-03-03 19:21:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:21:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:39,459 INFO L225 Difference]: With dead ends: 6771 [2022-03-03 19:21:39,459 INFO L226 Difference]: Without dead ends: 6694 [2022-03-03 19:21:39,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:21:39,459 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:39,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 222 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 596 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-03-03 19:21:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2022-03-03 19:21:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 5710. [2022-03-03 19:21:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 4.1488877211420565) internal successors, (23686), 5709 states have internal predecessors, (23686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 23686 transitions. [2022-03-03 19:21:39,557 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 23686 transitions. Word has length 24 [2022-03-03 19:21:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:39,557 INFO L470 AbstractCegarLoop]: Abstraction has 5710 states and 23686 transitions. [2022-03-03 19:21:39,557 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) [2022-03-03 19:21:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 23686 transitions. [2022-03-03 19:21:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:39,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:39,567 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:39,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-03-03 19:21:39,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:39,782 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:39,783 INFO L85 PathProgramCache]: Analyzing trace with hash -967191730, now seen corresponding path program 345 times [2022-03-03 19:21:39,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:39,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001684914] [2022-03-03 19:21:39,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:39,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:39,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:39,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001684914] [2022-03-03 19:21:39,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001684914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:39,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772035160] [2022-03-03 19:21:39,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:21:39,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:39,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:39,866 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) [2022-03-03 19:21:39,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-03 19:21:40,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:21:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:40,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-03 19:21:40,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:40,341 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 156 treesize of output 136 [2022-03-03 19:21:40,798 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 165 treesize of output 141 [2022-03-03 19:21:40,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:40,801 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 133 [2022-03-03 19:21:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:41,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:41,336 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 188 treesize of output 164 [2022-03-03 19:21:41,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:41,912 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 329 treesize of output 286 [2022-03-03 19:21:41,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 232 [2022-03-03 19:21:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:42,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772035160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:42,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:42,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-03-03 19:21:42,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562937574] [2022-03-03 19:21:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:42,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:21:42,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:21:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:21:42,114 INFO L87 Difference]: Start difference. First operand 5710 states and 23686 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:42,800 INFO L93 Difference]: Finished difference Result 6999 states and 28468 transitions. [2022-03-03 19:21:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:21:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:42,815 INFO L225 Difference]: With dead ends: 6999 [2022-03-03 19:21:42,815 INFO L226 Difference]: Without dead ends: 6872 [2022-03-03 19:21:42,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:21:42,816 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:42,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 465 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 757 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-03-03 19:21:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2022-03-03 19:21:42,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 5712. [2022-03-03 19:21:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5712 states, 5711 states have (on average 4.149185781824549) internal successors, (23696), 5711 states have internal predecessors, (23696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5712 states to 5712 states and 23696 transitions. [2022-03-03 19:21:42,916 INFO L78 Accepts]: Start accepts. Automaton has 5712 states and 23696 transitions. Word has length 24 [2022-03-03 19:21:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:42,916 INFO L470 AbstractCegarLoop]: Abstraction has 5712 states and 23696 transitions. [2022-03-03 19:21:42,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5712 states and 23696 transitions. [2022-03-03 19:21:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:42,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:42,926 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:42,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:43,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2022-03-03 19:21:43,127 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:43,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2027969820, now seen corresponding path program 346 times [2022-03-03 19:21:43,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:43,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304813227] [2022-03-03 19:21:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:43,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:43,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304813227] [2022-03-03 19:21:43,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304813227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:43,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160231596] [2022-03-03 19:21:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:21:43,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:43,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:43,239 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) [2022-03-03 19:21:43,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-03 19:21:43,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:21:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:43,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:43,736 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 231 treesize of output 203 [2022-03-03 19:21:44,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:44,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-03-03 19:21:44,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:21:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:44,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:44,250 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 3 treesize of output 1 [2022-03-03 19:21:44,543 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 314 treesize of output 270 [2022-03-03 19:21:44,552 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:44,552 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 277 treesize of output 240 [2022-03-03 19:21:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:44,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160231596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:44,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:44,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:21:44,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339078886] [2022-03-03 19:21:44,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:44,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:21:44,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:21:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:21:44,774 INFO L87 Difference]: Start difference. First operand 5712 states and 23696 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:45,006 INFO L93 Difference]: Finished difference Result 6693 states and 27325 transitions. [2022-03-03 19:21:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:21:45,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:45,022 INFO L225 Difference]: With dead ends: 6693 [2022-03-03 19:21:45,022 INFO L226 Difference]: Without dead ends: 6602 [2022-03-03 19:21:45,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:21:45,022 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 189 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:45,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 186 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 391 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2022-03-03 19:21:45,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2022-03-03 19:21:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 5710. [2022-03-03 19:21:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 4.1488877211420565) internal successors, (23686), 5709 states have internal predecessors, (23686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 23686 transitions. [2022-03-03 19:21:45,128 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 23686 transitions. Word has length 24 [2022-03-03 19:21:45,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:45,129 INFO L470 AbstractCegarLoop]: Abstraction has 5710 states and 23686 transitions. [2022-03-03 19:21:45,129 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) [2022-03-03 19:21:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 23686 transitions. [2022-03-03 19:21:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:45,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:45,139 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:45,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Ended with exit code 0 [2022-03-03 19:21:45,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-03-03 19:21:45,354 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1699717928, now seen corresponding path program 347 times [2022-03-03 19:21:45,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:45,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020445898] [2022-03-03 19:21:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:45,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:45,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:45,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020445898] [2022-03-03 19:21:45,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020445898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:45,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712422536] [2022-03-03 19:21:45,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:21:45,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:45,461 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) [2022-03-03 19:21:45,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-03 19:21:45,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:21:45,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:45,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:45,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:45,912 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 153 treesize of output 137 [2022-03-03 19:21:46,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:46,340 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-03 19:21:46,343 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 17 treesize of output 13 [2022-03-03 19:21:46,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:46,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:46,612 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 3 treesize of output 1 [2022-03-03 19:21:46,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 207 [2022-03-03 19:21:46,848 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:21:46,848 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 214 treesize of output 191 [2022-03-03 19:21:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:21:47,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712422536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:47,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:47,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:21:47,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471608859] [2022-03-03 19:21:47,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:47,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:21:47,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:21:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:21:47,006 INFO L87 Difference]: Start difference. First operand 5710 states and 23686 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:47,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:47,335 INFO L93 Difference]: Finished difference Result 6871 states and 28008 transitions. [2022-03-03 19:21:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-03 19:21:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:47,351 INFO L225 Difference]: With dead ends: 6871 [2022-03-03 19:21:47,351 INFO L226 Difference]: Without dead ends: 6804 [2022-03-03 19:21:47,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:21:47,352 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 237 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:47,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 213 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 596 Invalid, 0 Unknown, 230 Unchecked, 0.2s Time] [2022-03-03 19:21:47,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6804 states. [2022-03-03 19:21:47,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6804 to 5770. [2022-03-03 19:21:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5770 states, 5769 states have (on average 4.152366094643786) internal successors, (23955), 5769 states have internal predecessors, (23955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 23955 transitions. [2022-03-03 19:21:47,458 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 23955 transitions. Word has length 24 [2022-03-03 19:21:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:47,458 INFO L470 AbstractCegarLoop]: Abstraction has 5770 states and 23955 transitions. [2022-03-03 19:21:47,458 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) [2022-03-03 19:21:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 23955 transitions. [2022-03-03 19:21:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:47,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:47,469 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:47,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-03-03 19:21:47,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-03-03 19:21:47,679 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:47,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:47,680 INFO L85 PathProgramCache]: Analyzing trace with hash -513710171, now seen corresponding path program 348 times [2022-03-03 19:21:47,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:47,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683018650] [2022-03-03 19:21:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:47,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:47,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:47,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683018650] [2022-03-03 19:21:47,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683018650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:47,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776426757] [2022-03-03 19:21:47,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:21:47,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:47,840 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) [2022-03-03 19:21:47,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-03 19:21:48,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:21:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:48,282 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 17 treesize of output 13 [2022-03-03 19:21:48,443 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 145 treesize of output 125 [2022-03-03 19:21:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:48,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 115 [2022-03-03 19:21:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:48,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:48,618 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 159 treesize of output 139 [2022-03-03 19:21:48,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:48,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:21:48,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:21:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:48,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776426757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:48,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:48,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-03-03 19:21:48,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120301075] [2022-03-03 19:21:48,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:48,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:21:48,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:21:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:21:48,938 INFO L87 Difference]: Start difference. First operand 5770 states and 23955 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:50,113 INFO L93 Difference]: Finished difference Result 6467 states and 26264 transitions. [2022-03-03 19:21:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:21:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:50,128 INFO L225 Difference]: With dead ends: 6467 [2022-03-03 19:21:50,128 INFO L226 Difference]: Without dead ends: 6366 [2022-03-03 19:21:50,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:21:50,129 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 116 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:50,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 512 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1479 Invalid, 0 Unknown, 411 Unchecked, 0.5s Time] [2022-03-03 19:21:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2022-03-03 19:21:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 5807. [2022-03-03 19:21:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 4.151739579745091) internal successors, (24105), 5806 states have internal predecessors, (24105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 24105 transitions. [2022-03-03 19:21:50,229 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 24105 transitions. Word has length 24 [2022-03-03 19:21:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 24105 transitions. [2022-03-03 19:21:50,230 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) [2022-03-03 19:21:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 24105 transitions. [2022-03-03 19:21:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:50,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:50,240 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:50,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-03-03 19:21:50,450 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1405840003, now seen corresponding path program 349 times [2022-03-03 19:21:50,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:50,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976442834] [2022-03-03 19:21:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:50,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:50,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976442834] [2022-03-03 19:21:50,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976442834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:50,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453872958] [2022-03-03 19:21:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:21:50,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:50,574 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) [2022-03-03 19:21:50,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-03 19:21:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:50,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:51,062 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 21 treesize of output 13 [2022-03-03 19:21:51,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-03 19:21:51,140 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 4 treesize of output 2 [2022-03-03 19:21:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:51,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:51,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:51,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:51,638 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 19 treesize of output 23 [2022-03-03 19:21:51,651 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 3 treesize of output 1 [2022-03-03 19:21:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:51,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453872958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:51,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:51,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-03-03 19:21:51,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897747423] [2022-03-03 19:21:51,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:51,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:21:51,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:51,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:21:51,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:21:51,694 INFO L87 Difference]: Start difference. First operand 5807 states and 24105 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:52,270 INFO L93 Difference]: Finished difference Result 6474 states and 26304 transitions. [2022-03-03 19:21:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:21:52,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:52,285 INFO L225 Difference]: With dead ends: 6474 [2022-03-03 19:21:52,285 INFO L226 Difference]: Without dead ends: 6371 [2022-03-03 19:21:52,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:21:52,285 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:52,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 250 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2022-03-03 19:21:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 5807. [2022-03-03 19:21:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5806 states have (on average 4.153289700310024) internal successors, (24114), 5806 states have internal predecessors, (24114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 24114 transitions. [2022-03-03 19:21:52,377 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 24114 transitions. Word has length 24 [2022-03-03 19:21:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:52,378 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 24114 transitions. [2022-03-03 19:21:52,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 24114 transitions. [2022-03-03 19:21:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:52,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:52,388 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:52,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-03-03 19:21:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-03-03 19:21:52,603 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:52,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1566761425, now seen corresponding path program 350 times [2022-03-03 19:21:52,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:52,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430743711] [2022-03-03 19:21:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:52,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:52,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430743711] [2022-03-03 19:21:52,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430743711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:52,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818444452] [2022-03-03 19:21:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:21:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:52,804 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) [2022-03-03 19:21:52,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-03 19:21:53,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:21:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:53,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:53,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-03 19:21:53,553 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 32 treesize of output 24 [2022-03-03 19:21:53,555 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 4 treesize of output 2 [2022-03-03 19:21:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:53,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:53,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-03-03 19:21:54,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:54,072 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:21:54,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:54,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818444452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:54,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:54,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-03-03 19:21:54,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334942037] [2022-03-03 19:21:54,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:54,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:21:54,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:21:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:21:54,120 INFO L87 Difference]: Start difference. First operand 5807 states and 24114 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:54,627 INFO L93 Difference]: Finished difference Result 6633 states and 26889 transitions. [2022-03-03 19:21:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:21:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:54,641 INFO L225 Difference]: With dead ends: 6633 [2022-03-03 19:21:54,641 INFO L226 Difference]: Without dead ends: 6520 [2022-03-03 19:21:54,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:21:54,642 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:54,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 251 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:21:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2022-03-03 19:21:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 5852. [2022-03-03 19:21:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5852 states, 5851 states have (on average 4.15484532558537) internal successors, (24310), 5851 states have internal predecessors, (24310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5852 states to 5852 states and 24310 transitions. [2022-03-03 19:21:54,755 INFO L78 Accepts]: Start accepts. Automaton has 5852 states and 24310 transitions. Word has length 24 [2022-03-03 19:21:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:54,755 INFO L470 AbstractCegarLoop]: Abstraction has 5852 states and 24310 transitions. [2022-03-03 19:21:54,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5852 states and 24310 transitions. [2022-03-03 19:21:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:54,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:54,764 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:54,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-03-03 19:21:54,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2022-03-03 19:21:54,966 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1552715227, now seen corresponding path program 351 times [2022-03-03 19:21:54,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:54,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450335415] [2022-03-03 19:21:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:54,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:55,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:55,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450335415] [2022-03-03 19:21:55,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450335415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:55,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116994969] [2022-03-03 19:21:55,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:21:55,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:55,207 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) [2022-03-03 19:21:55,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-03 19:21:55,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:21:55,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:55,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:55,726 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 17 treesize of output 13 [2022-03-03 19:21:55,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:21:55,903 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-03 19:21:55,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 135 [2022-03-03 19:21:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:56,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:56,240 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 197 treesize of output 177 [2022-03-03 19:21:56,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:56,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:21:56,528 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 3 treesize of output 1 [2022-03-03 19:21:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:56,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116994969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:56,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:56,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2022-03-03 19:21:56,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354678172] [2022-03-03 19:21:56,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:21:56,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:56,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:21:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:21:56,583 INFO L87 Difference]: Start difference. First operand 5852 states and 24310 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:21:58,113 INFO L93 Difference]: Finished difference Result 6930 states and 27765 transitions. [2022-03-03 19:21:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:21:58,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:21:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:21:58,129 INFO L225 Difference]: With dead ends: 6930 [2022-03-03 19:21:58,130 INFO L226 Difference]: Without dead ends: 6787 [2022-03-03 19:21:58,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=389, Invalid=2803, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:21:58,130 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:21:58,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 611 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1796 Invalid, 0 Unknown, 441 Unchecked, 0.6s Time] [2022-03-03 19:21:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2022-03-03 19:21:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 5893. [2022-03-03 19:21:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5893 states, 5892 states have (on average 4.165648336727767) internal successors, (24544), 5892 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:21:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5893 states to 5893 states and 24544 transitions. [2022-03-03 19:21:58,239 INFO L78 Accepts]: Start accepts. Automaton has 5893 states and 24544 transitions. Word has length 24 [2022-03-03 19:21:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:21:58,239 INFO L470 AbstractCegarLoop]: Abstraction has 5893 states and 24544 transitions. [2022-03-03 19:21:58,239 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) [2022-03-03 19:21:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5893 states and 24544 transitions. [2022-03-03 19:21:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:21:58,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:21:58,250 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:21:58,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-03-03 19:21:58,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-03-03 19:21:58,467 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:21:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:21:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1636871461, now seen corresponding path program 352 times [2022-03-03 19:21:58,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:21:58,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741002370] [2022-03-03 19:21:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:21:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:21:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:21:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:21:58,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:21:58,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741002370] [2022-03-03 19:21:58,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741002370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:21:58,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623077796] [2022-03-03 19:21:58,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:21:58,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:21:58,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:21:58,591 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) [2022-03-03 19:21:58,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-03 19:21:58,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:21:58,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:21:58,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:21:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:21:59,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:21:59,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:21:59,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2022-03-03 19:21:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:59,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:21:59,426 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 264 treesize of output 230 [2022-03-03 19:21:59,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:21:59,780 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 17 treesize of output 21 [2022-03-03 19:21:59,794 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 3 treesize of output 1 [2022-03-03 19:21:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:21:59,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623077796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:21:59,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:21:59,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-03-03 19:21:59,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098590986] [2022-03-03 19:21:59,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:21:59,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:21:59,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:21:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:21:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:21:59,855 INFO L87 Difference]: Start difference. First operand 5893 states and 24544 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:00,667 INFO L93 Difference]: Finished difference Result 7598 states and 30322 transitions. [2022-03-03 19:22:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:22:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:00,685 INFO L225 Difference]: With dead ends: 7598 [2022-03-03 19:22:00,685 INFO L226 Difference]: Without dead ends: 7421 [2022-03-03 19:22:00,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:22:00,685 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 207 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:00,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 314 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:22:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2022-03-03 19:22:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 5977. [2022-03-03 19:22:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 4.178045515394913) internal successors, (24968), 5976 states have internal predecessors, (24968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 24968 transitions. [2022-03-03 19:22:00,802 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 24968 transitions. Word has length 24 [2022-03-03 19:22:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:00,802 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 24968 transitions. [2022-03-03 19:22:00,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 24968 transitions. [2022-03-03 19:22:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:00,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:00,813 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:00,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:01,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2022-03-03 19:22:01,031 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1482605191, now seen corresponding path program 353 times [2022-03-03 19:22:01,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:01,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049878489] [2022-03-03 19:22:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:01,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:01,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049878489] [2022-03-03 19:22:01,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049878489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:01,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114450272] [2022-03-03 19:22:01,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:22:01,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:01,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:01,126 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) [2022-03-03 19:22:01,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-03 19:22:01,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:22:01,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:01,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:01,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:22:01,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:01,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 239 [2022-03-03 19:22:01,777 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 239 treesize of output 203 [2022-03-03 19:22:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:02,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:02,223 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 329 treesize of output 289 [2022-03-03 19:22:02,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:02,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:22:02,395 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 3 treesize of output 1 [2022-03-03 19:22:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:02,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114450272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:02,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:02,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-03 19:22:02,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649526381] [2022-03-03 19:22:02,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:02,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:22:02,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:22:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:22:02,439 INFO L87 Difference]: Start difference. First operand 5977 states and 24968 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:03,717 INFO L93 Difference]: Finished difference Result 9082 states and 34630 transitions. [2022-03-03 19:22:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:22:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:03,767 INFO L225 Difference]: With dead ends: 9082 [2022-03-03 19:22:03,767 INFO L226 Difference]: Without dead ends: 8756 [2022-03-03 19:22:03,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=693, Invalid=4137, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:22:03,768 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 528 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:03,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 527 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1699 Invalid, 0 Unknown, 269 Unchecked, 0.5s Time] [2022-03-03 19:22:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8756 states. [2022-03-03 19:22:03,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8756 to 6107. [2022-03-03 19:22:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6107 states, 6106 states have (on average 4.171306911234851) internal successors, (25470), 6106 states have internal predecessors, (25470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6107 states to 6107 states and 25470 transitions. [2022-03-03 19:22:03,896 INFO L78 Accepts]: Start accepts. Automaton has 6107 states and 25470 transitions. Word has length 24 [2022-03-03 19:22:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:03,896 INFO L470 AbstractCegarLoop]: Abstraction has 6107 states and 25470 transitions. [2022-03-03 19:22:03,897 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) [2022-03-03 19:22:03,897 INFO L276 IsEmpty]: Start isEmpty. Operand 6107 states and 25470 transitions. [2022-03-03 19:22:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:03,907 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:03,907 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:03,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-03-03 19:22:04,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:04,121 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 130961543, now seen corresponding path program 354 times [2022-03-03 19:22:04,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:04,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665275557] [2022-03-03 19:22:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:04,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:04,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665275557] [2022-03-03 19:22:04,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665275557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:04,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713214016] [2022-03-03 19:22:04,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:22:04,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:04,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:04,227 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) [2022-03-03 19:22:04,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-03 19:22:04,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:22:04,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:04,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:04,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:04,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:22:04,800 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 239 treesize of output 201 [2022-03-03 19:22:04,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 211 treesize of output 183 [2022-03-03 19:22:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:05,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:05,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 177 [2022-03-03 19:22:05,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:05,429 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 17 treesize of output 21 [2022-03-03 19:22:05,438 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 3 treesize of output 1 [2022-03-03 19:22:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:05,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713214016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:05,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:05,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-03-03 19:22:05,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26213585] [2022-03-03 19:22:05,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:05,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:22:05,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:05,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:22:05,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:22:05,490 INFO L87 Difference]: Start difference. First operand 6107 states and 25470 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:07,393 INFO L93 Difference]: Finished difference Result 8780 states and 33541 transitions. [2022-03-03 19:22:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:22:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:07,412 INFO L225 Difference]: With dead ends: 8780 [2022-03-03 19:22:07,412 INFO L226 Difference]: Without dead ends: 8392 [2022-03-03 19:22:07,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:22:07,413 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 402 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:07,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 419 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:22:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8392 states. [2022-03-03 19:22:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8392 to 6168. [2022-03-03 19:22:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6168 states, 6167 states have (on average 4.1281011837197985) internal successors, (25458), 6167 states have internal predecessors, (25458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6168 states to 6168 states and 25458 transitions. [2022-03-03 19:22:07,543 INFO L78 Accepts]: Start accepts. Automaton has 6168 states and 25458 transitions. Word has length 24 [2022-03-03 19:22:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:07,543 INFO L470 AbstractCegarLoop]: Abstraction has 6168 states and 25458 transitions. [2022-03-03 19:22:07,544 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) [2022-03-03 19:22:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6168 states and 25458 transitions. [2022-03-03 19:22:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:07,554 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:07,554 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:07,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:07,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:07,770 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:07,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1662016573, now seen corresponding path program 355 times [2022-03-03 19:22:07,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:07,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547149624] [2022-03-03 19:22:07,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:07,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:07,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:07,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547149624] [2022-03-03 19:22:07,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547149624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:07,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149617599] [2022-03-03 19:22:07,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:22:07,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:07,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:07,925 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) [2022-03-03 19:22:07,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-03 19:22:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:08,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:08,491 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 177 treesize of output 159 [2022-03-03 19:22:08,685 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 17 treesize of output 13 [2022-03-03 19:22:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:08,688 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:22:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:08,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:08,886 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 3 treesize of output 1 [2022-03-03 19:22:08,973 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 159 treesize of output 139 [2022-03-03 19:22:09,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:09,015 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 136 [2022-03-03 19:22:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:09,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149617599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:09,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:09,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-03-03 19:22:09,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840792332] [2022-03-03 19:22:09,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:09,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:22:09,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:09,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:22:09,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:22:09,332 INFO L87 Difference]: Start difference. First operand 6168 states and 25458 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:10,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:10,659 INFO L93 Difference]: Finished difference Result 8515 states and 32695 transitions. [2022-03-03 19:22:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:22:10,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:10,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:10,680 INFO L225 Difference]: With dead ends: 8515 [2022-03-03 19:22:10,681 INFO L226 Difference]: Without dead ends: 8345 [2022-03-03 19:22:10,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=412, Invalid=2668, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:22:10,681 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 360 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:10,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 456 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:22:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2022-03-03 19:22:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 6290. [2022-03-03 19:22:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6290 states, 6289 states have (on average 4.138813801876292) internal successors, (26029), 6289 states have internal predecessors, (26029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:10,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6290 states to 6290 states and 26029 transitions. [2022-03-03 19:22:10,822 INFO L78 Accepts]: Start accepts. Automaton has 6290 states and 26029 transitions. Word has length 24 [2022-03-03 19:22:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:10,822 INFO L470 AbstractCegarLoop]: Abstraction has 6290 states and 26029 transitions. [2022-03-03 19:22:10,822 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) [2022-03-03 19:22:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 6290 states and 26029 transitions. [2022-03-03 19:22:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:10,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:10,834 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:10,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:11,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:11,052 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 692394341, now seen corresponding path program 356 times [2022-03-03 19:22:11,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:11,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204339507] [2022-03-03 19:22:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:11,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:11,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204339507] [2022-03-03 19:22:11,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204339507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:11,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376158219] [2022-03-03 19:22:11,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:22:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:11,219 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) [2022-03-03 19:22:11,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-03-03 19:22:11,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:22:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:11,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-03-03 19:22:11,750 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 17 treesize of output 13 [2022-03-03 19:22:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:11,753 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 31 treesize of output 25 [2022-03-03 19:22:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:11,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:11,843 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 3 treesize of output 1 [2022-03-03 19:22:12,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:12,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 228 [2022-03-03 19:22:12,065 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 223 treesize of output 199 [2022-03-03 19:22:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:12,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376158219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:12,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:12,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-03-03 19:22:12,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845278287] [2022-03-03 19:22:12,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:12,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:22:12,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:22:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:22:12,269 INFO L87 Difference]: Start difference. First operand 6290 states and 26029 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:13,721 INFO L93 Difference]: Finished difference Result 7674 states and 30101 transitions. [2022-03-03 19:22:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:22:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:13,740 INFO L225 Difference]: With dead ends: 7674 [2022-03-03 19:22:13,740 INFO L226 Difference]: Without dead ends: 7390 [2022-03-03 19:22:13,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=564, Invalid=4548, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:22:13,741 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 282 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:13,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 583 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:22:13,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2022-03-03 19:22:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 6310. [2022-03-03 19:22:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6310 states, 6309 states have (on average 4.1236329053732765) internal successors, (26016), 6309 states have internal predecessors, (26016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6310 states to 6310 states and 26016 transitions. [2022-03-03 19:22:13,855 INFO L78 Accepts]: Start accepts. Automaton has 6310 states and 26016 transitions. Word has length 24 [2022-03-03 19:22:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:13,855 INFO L470 AbstractCegarLoop]: Abstraction has 6310 states and 26016 transitions. [2022-03-03 19:22:13,855 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) [2022-03-03 19:22:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6310 states and 26016 transitions. [2022-03-03 19:22:13,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:13,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:13,866 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:13,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:14,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:14,075 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:14,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:14,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1684061767, now seen corresponding path program 357 times [2022-03-03 19:22:14,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:14,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555304046] [2022-03-03 19:22:14,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:14,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:14,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:14,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555304046] [2022-03-03 19:22:14,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555304046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:14,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150610349] [2022-03-03 19:22:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:22:14,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:14,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:14,346 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) [2022-03-03 19:22:14,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-03-03 19:22:14,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:22:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:14,818 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 17 treesize of output 13 [2022-03-03 19:22:15,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:15,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:15,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 169 [2022-03-03 19:22:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:15,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:15,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:15,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:15,545 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:22:15,553 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 3 treesize of output 1 [2022-03-03 19:22:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:15,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150610349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:15,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:15,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-03-03 19:22:15,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733730738] [2022-03-03 19:22:15,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:15,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:22:15,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:15,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:22:15,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:22:15,581 INFO L87 Difference]: Start difference. First operand 6310 states and 26016 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:17,569 INFO L93 Difference]: Finished difference Result 7639 states and 30274 transitions. [2022-03-03 19:22:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:22:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:17,586 INFO L225 Difference]: With dead ends: 7639 [2022-03-03 19:22:17,586 INFO L226 Difference]: Without dead ends: 7509 [2022-03-03 19:22:17,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:22:17,587 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 180 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:17,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 718 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1696 Invalid, 0 Unknown, 573 Unchecked, 0.6s Time] [2022-03-03 19:22:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2022-03-03 19:22:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 6353. [2022-03-03 19:22:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6353 states, 6352 states have (on average 4.126731738035264) internal successors, (26213), 6352 states have internal predecessors, (26213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6353 states to 6353 states and 26213 transitions. [2022-03-03 19:22:17,702 INFO L78 Accepts]: Start accepts. Automaton has 6353 states and 26213 transitions. Word has length 24 [2022-03-03 19:22:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 6353 states and 26213 transitions. [2022-03-03 19:22:17,702 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) [2022-03-03 19:22:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 6353 states and 26213 transitions. [2022-03-03 19:22:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:17,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:17,713 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:17,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-03-03 19:22:17,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:17,919 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1338444685, now seen corresponding path program 358 times [2022-03-03 19:22:17,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:17,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588059842] [2022-03-03 19:22:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:18,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:18,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588059842] [2022-03-03 19:22:18,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588059842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:18,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844067780] [2022-03-03 19:22:18,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:22:18,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:18,040 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) [2022-03-03 19:22:18,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-03-03 19:22:18,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:22:18,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:18,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:18,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-03 19:22:18,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:18,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 149 [2022-03-03 19:22:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:18,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:19,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 223 [2022-03-03 19:22:19,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:19,288 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 19 treesize of output 23 [2022-03-03 19:22:19,300 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 3 treesize of output 1 [2022-03-03 19:22:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:19,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844067780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:19,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:19,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-03-03 19:22:19,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234874177] [2022-03-03 19:22:19,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:19,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:22:19,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:22:19,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:22:19,340 INFO L87 Difference]: Start difference. First operand 6353 states and 26213 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:20,093 INFO L93 Difference]: Finished difference Result 7263 states and 29117 transitions. [2022-03-03 19:22:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:22:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:20,111 INFO L225 Difference]: With dead ends: 7263 [2022-03-03 19:22:20,111 INFO L226 Difference]: Without dead ends: 7122 [2022-03-03 19:22:20,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:22:20,112 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:20,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 317 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:22:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-03-03 19:22:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 6289. [2022-03-03 19:22:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 6288 states have (on average 4.116412213740458) internal successors, (25884), 6288 states have internal predecessors, (25884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 25884 transitions. [2022-03-03 19:22:20,228 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 25884 transitions. Word has length 24 [2022-03-03 19:22:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:20,228 INFO L470 AbstractCegarLoop]: Abstraction has 6289 states and 25884 transitions. [2022-03-03 19:22:20,228 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) [2022-03-03 19:22:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 25884 transitions. [2022-03-03 19:22:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:20,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:20,240 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:20,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:20,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-03-03 19:22:20,455 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash 340329627, now seen corresponding path program 359 times [2022-03-03 19:22:20,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:20,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250017461] [2022-03-03 19:22:20,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:20,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:20,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:20,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250017461] [2022-03-03 19:22:20,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250017461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:20,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172166157] [2022-03-03 19:22:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:22:20,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:20,557 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) [2022-03-03 19:22:20,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-03-03 19:22:20,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:22:20,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:21,026 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 17 treesize of output 13 [2022-03-03 19:22:21,119 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 153 treesize of output 133 [2022-03-03 19:22:21,121 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 143 treesize of output 125 [2022-03-03 19:22:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:21,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:21,499 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 197 treesize of output 177 [2022-03-03 19:22:21,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:21,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:22:21,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:21,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172166157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:21,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:21,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-03-03 19:22:21,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679803282] [2022-03-03 19:22:21,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:21,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:22:21,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:22:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:22:21,835 INFO L87 Difference]: Start difference. First operand 6289 states and 25884 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:23,268 INFO L93 Difference]: Finished difference Result 8737 states and 33285 transitions. [2022-03-03 19:22:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:22:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:23,287 INFO L225 Difference]: With dead ends: 8737 [2022-03-03 19:22:23,287 INFO L226 Difference]: Without dead ends: 8493 [2022-03-03 19:22:23,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:22:23,288 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 322 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:23,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 390 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:22:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8493 states. [2022-03-03 19:22:23,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8493 to 6181. [2022-03-03 19:22:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.1029126213592235) internal successors, (25356), 6180 states have internal predecessors, (25356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 25356 transitions. [2022-03-03 19:22:23,411 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 25356 transitions. Word has length 24 [2022-03-03 19:22:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:23,411 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 25356 transitions. [2022-03-03 19:22:23,411 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) [2022-03-03 19:22:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 25356 transitions. [2022-03-03 19:22:23,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:23,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:23,422 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:23,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-03-03 19:22:23,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-03-03 19:22:23,635 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:23,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1677689739, now seen corresponding path program 360 times [2022-03-03 19:22:23,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:23,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346690962] [2022-03-03 19:22:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:23,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:23,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:23,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346690962] [2022-03-03 19:22:23,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346690962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:23,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152645563] [2022-03-03 19:22:23,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:22:23,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:23,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:23,835 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) [2022-03-03 19:22:23,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-03-03 19:22:24,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:22:24,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:24,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:24,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:24,295 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 17 treesize of output 13 [2022-03-03 19:22:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:24,464 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-03 19:22:24,467 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 153 treesize of output 135 [2022-03-03 19:22:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:24,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:24,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 299 [2022-03-03 19:22:25,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:25,156 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 19 treesize of output 23 [2022-03-03 19:22:25,164 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 3 treesize of output 1 [2022-03-03 19:22:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:25,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152645563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:25,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:25,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:22:25,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426418873] [2022-03-03 19:22:25,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:25,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:22:25,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:22:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:22:25,190 INFO L87 Difference]: Start difference. First operand 6181 states and 25356 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:26,129 INFO L93 Difference]: Finished difference Result 6796 states and 27372 transitions. [2022-03-03 19:22:26,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-03 19:22:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:26,145 INFO L225 Difference]: With dead ends: 6796 [2022-03-03 19:22:26,145 INFO L226 Difference]: Without dead ends: 6777 [2022-03-03 19:22:26,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:22:26,145 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:26,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 394 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1037 Invalid, 0 Unknown, 159 Unchecked, 0.4s Time] [2022-03-03 19:22:26,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6777 states. [2022-03-03 19:22:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6777 to 6181. [2022-03-03 19:22:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.1029126213592235) internal successors, (25356), 6180 states have internal predecessors, (25356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 25356 transitions. [2022-03-03 19:22:26,254 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 25356 transitions. Word has length 24 [2022-03-03 19:22:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 25356 transitions. [2022-03-03 19:22:26,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 25356 transitions. [2022-03-03 19:22:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:26,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:26,266 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:26,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-03-03 19:22:26,483 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1337153743, now seen corresponding path program 361 times [2022-03-03 19:22:26,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:26,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955836827] [2022-03-03 19:22:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:26,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:26,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:26,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955836827] [2022-03-03 19:22:26,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955836827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:26,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744073834] [2022-03-03 19:22:26,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:22:26,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:26,628 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) [2022-03-03 19:22:26,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-03-03 19:22:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:27,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:27,077 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 17 treesize of output 13 [2022-03-03 19:22:27,258 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 145 treesize of output 125 [2022-03-03 19:22:27,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:27,260 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 117 [2022-03-03 19:22:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:27,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:27,576 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 206 treesize of output 186 [2022-03-03 19:22:27,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:27,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:22:27,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:22:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:22:27,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744073834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:27,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:27,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-03-03 19:22:27,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308333745] [2022-03-03 19:22:27,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:27,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:22:27,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:22:27,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:22:27,937 INFO L87 Difference]: Start difference. First operand 6181 states and 25356 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:28,294 INFO L93 Difference]: Finished difference Result 6928 states and 27715 transitions. [2022-03-03 19:22:28,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-03 19:22:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:28,312 INFO L225 Difference]: With dead ends: 6928 [2022-03-03 19:22:28,312 INFO L226 Difference]: Without dead ends: 6878 [2022-03-03 19:22:28,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:22:28,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 119 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:28,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 277 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 590 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-03-03 19:22:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2022-03-03 19:22:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 6100. [2022-03-03 19:22:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6100 states, 6099 states have (on average 4.098048860468929) internal successors, (24994), 6099 states have internal predecessors, (24994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6100 states to 6100 states and 24994 transitions. [2022-03-03 19:22:28,411 INFO L78 Accepts]: Start accepts. Automaton has 6100 states and 24994 transitions. Word has length 24 [2022-03-03 19:22:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:28,411 INFO L470 AbstractCegarLoop]: Abstraction has 6100 states and 24994 transitions. [2022-03-03 19:22:28,411 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) [2022-03-03 19:22:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6100 states and 24994 transitions. [2022-03-03 19:22:28,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:28,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:28,421 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:28,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-03-03 19:22:28,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:28,635 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 356999237, now seen corresponding path program 362 times [2022-03-03 19:22:28,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:28,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242908141] [2022-03-03 19:22:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:28,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:28,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242908141] [2022-03-03 19:22:28,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242908141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:28,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534833267] [2022-03-03 19:22:28,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:22:28,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:28,868 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) [2022-03-03 19:22:28,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-03-03 19:22:29,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:22:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:29,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:29,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 226 [2022-03-03 19:22:29,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:29,620 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 198 [2022-03-03 19:22:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:29,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:30,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-03 19:22:30,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:30,352 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 19 treesize of output 23 [2022-03-03 19:22:30,362 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 3 treesize of output 1 [2022-03-03 19:22:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:30,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534833267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:30,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:30,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:22:30,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745544835] [2022-03-03 19:22:30,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:30,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:22:30,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:30,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:22:30,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:22:30,389 INFO L87 Difference]: Start difference. First operand 6100 states and 24994 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:31,504 INFO L93 Difference]: Finished difference Result 7139 states and 28376 transitions. [2022-03-03 19:22:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:22:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:31,520 INFO L225 Difference]: With dead ends: 7139 [2022-03-03 19:22:31,520 INFO L226 Difference]: Without dead ends: 7104 [2022-03-03 19:22:31,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:22:31,520 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:31,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 423 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1460 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-03-03 19:22:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7104 states. [2022-03-03 19:22:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7104 to 6077. [2022-03-03 19:22:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 4.097761685319289) internal successors, (24898), 6076 states have internal predecessors, (24898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 24898 transitions. [2022-03-03 19:22:31,676 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 24898 transitions. Word has length 24 [2022-03-03 19:22:31,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:31,676 INFO L470 AbstractCegarLoop]: Abstraction has 6077 states and 24898 transitions. [2022-03-03 19:22:31,676 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) [2022-03-03 19:22:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 24898 transitions. [2022-03-03 19:22:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:31,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:31,691 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:31,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:31,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:31,903 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash 472538421, now seen corresponding path program 363 times [2022-03-03 19:22:31,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:31,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893122848] [2022-03-03 19:22:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:31,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:32,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:32,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893122848] [2022-03-03 19:22:32,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893122848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:32,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888701697] [2022-03-03 19:22:32,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:22:32,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:32,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:32,005 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) [2022-03-03 19:22:32,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-03-03 19:22:32,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:22:32,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:32,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:22:32,528 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 32 treesize of output 24 [2022-03-03 19:22:32,530 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 4 treesize of output 2 [2022-03-03 19:22:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:32,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:32,732 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 159 treesize of output 139 [2022-03-03 19:22:32,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:32,997 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 19 treesize of output 23 [2022-03-03 19:22:33,008 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 3 treesize of output 1 [2022-03-03 19:22:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:33,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888701697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:33,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:33,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-03-03 19:22:33,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110848725] [2022-03-03 19:22:33,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:22:33,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:33,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:22:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:22:33,067 INFO L87 Difference]: Start difference. First operand 6077 states and 24898 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:33,763 INFO L93 Difference]: Finished difference Result 6939 states and 27718 transitions. [2022-03-03 19:22:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:22:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:33,780 INFO L225 Difference]: With dead ends: 6939 [2022-03-03 19:22:33,781 INFO L226 Difference]: Without dead ends: 6747 [2022-03-03 19:22:33,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:22:33,781 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 149 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:33,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 265 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:22:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6747 states. [2022-03-03 19:22:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6747 to 6109. [2022-03-03 19:22:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 4.0987229862475445) internal successors, (25035), 6108 states have internal predecessors, (25035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 25035 transitions. [2022-03-03 19:22:33,892 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 25035 transitions. Word has length 24 [2022-03-03 19:22:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:33,892 INFO L470 AbstractCegarLoop]: Abstraction has 6109 states and 25035 transitions. [2022-03-03 19:22:33,892 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) [2022-03-03 19:22:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 25035 transitions. [2022-03-03 19:22:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:33,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:33,905 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:33,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:34,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:34,122 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:34,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:34,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1741957279, now seen corresponding path program 364 times [2022-03-03 19:22:34,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:34,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809180360] [2022-03-03 19:22:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:34,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:34,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:34,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809180360] [2022-03-03 19:22:34,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809180360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:34,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255755818] [2022-03-03 19:22:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:22:34,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:34,250 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) [2022-03-03 19:22:34,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-03-03 19:22:34,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:22:34,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:34,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:34,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:34,751 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 17 treesize of output 13 [2022-03-03 19:22:34,819 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 32 treesize of output 24 [2022-03-03 19:22:34,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:34,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:35,021 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 231 treesize of output 207 [2022-03-03 19:22:35,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:35,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:22:35,318 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 3 treesize of output 1 [2022-03-03 19:22:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:35,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255755818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:35,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:35,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-03-03 19:22:35,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687101022] [2022-03-03 19:22:35,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:35,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:22:35,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:35,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:22:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:22:35,377 INFO L87 Difference]: Start difference. First operand 6109 states and 25035 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:36,156 INFO L93 Difference]: Finished difference Result 7459 states and 29377 transitions. [2022-03-03 19:22:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:22:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:36,175 INFO L225 Difference]: With dead ends: 7459 [2022-03-03 19:22:36,176 INFO L226 Difference]: Without dead ends: 7267 [2022-03-03 19:22:36,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:22:36,176 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 158 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:36,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 352 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:22:36,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7267 states. [2022-03-03 19:22:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7267 to 6142. [2022-03-03 19:22:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 4.100472235792216) internal successors, (25181), 6141 states have internal predecessors, (25181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 25181 transitions. [2022-03-03 19:22:36,317 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 25181 transitions. Word has length 24 [2022-03-03 19:22:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:36,317 INFO L470 AbstractCegarLoop]: Abstraction has 6142 states and 25181 transitions. [2022-03-03 19:22:36,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 25181 transitions. [2022-03-03 19:22:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:36,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:36,328 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:36,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:36,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:36,546 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash -566466635, now seen corresponding path program 365 times [2022-03-03 19:22:36,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:36,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588757446] [2022-03-03 19:22:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:36,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:36,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588757446] [2022-03-03 19:22:36,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588757446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:36,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120088616] [2022-03-03 19:22:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:22:36,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:36,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:36,672 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) [2022-03-03 19:22:36,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-03-03 19:22:37,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:22:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:37,133 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 17 treesize of output 13 [2022-03-03 19:22:37,256 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 179 treesize of output 153 [2022-03-03 19:22:37,258 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 153 treesize of output 135 [2022-03-03 19:22:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:37,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:37,575 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 197 treesize of output 177 [2022-03-03 19:22:37,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:37,786 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 19 treesize of output 23 [2022-03-03 19:22:37,795 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 3 treesize of output 1 [2022-03-03 19:22:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:37,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120088616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:37,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:37,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-03-03 19:22:37,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194357004] [2022-03-03 19:22:37,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:37,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:22:37,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:37,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:22:37,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:22:37,846 INFO L87 Difference]: Start difference. First operand 6142 states and 25181 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:38,769 INFO L93 Difference]: Finished difference Result 7982 states and 31033 transitions. [2022-03-03 19:22:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:22:38,769 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:38,787 INFO L225 Difference]: With dead ends: 7982 [2022-03-03 19:22:38,787 INFO L226 Difference]: Without dead ends: 7808 [2022-03-03 19:22:38,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:22:38,787 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 244 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:38,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 337 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:22:38,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7808 states. [2022-03-03 19:22:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7808 to 6154. [2022-03-03 19:22:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 4.106452137168861) internal successors, (25267), 6153 states have internal predecessors, (25267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:38,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 25267 transitions. [2022-03-03 19:22:38,901 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 25267 transitions. Word has length 24 [2022-03-03 19:22:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:38,901 INFO L470 AbstractCegarLoop]: Abstraction has 6154 states and 25267 transitions. [2022-03-03 19:22:38,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 25267 transitions. [2022-03-03 19:22:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:38,912 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:38,912 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:38,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:39,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable383 [2022-03-03 19:22:39,130 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:39,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1047100099, now seen corresponding path program 366 times [2022-03-03 19:22:39,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:39,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841653107] [2022-03-03 19:22:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:39,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:39,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:39,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841653107] [2022-03-03 19:22:39,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841653107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:39,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998657936] [2022-03-03 19:22:39,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:22:39,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:39,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:39,229 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) [2022-03-03 19:22:39,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-03-03 19:22:39,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:22:39,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:39,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:39,560 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 17 treesize of output 13 [2022-03-03 19:22:39,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 153 [2022-03-03 19:22:39,683 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 153 treesize of output 135 [2022-03-03 19:22:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:39,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:39,993 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 159 treesize of output 139 [2022-03-03 19:22:40,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:40,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2022-03-03 19:22:40,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:22:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:40,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998657936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:40,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:40,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-03-03 19:22:40,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204535444] [2022-03-03 19:22:40,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:40,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-03 19:22:40,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-03 19:22:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-03 19:22:40,302 INFO L87 Difference]: Start difference. First operand 6154 states and 25267 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:41,103 INFO L93 Difference]: Finished difference Result 7489 states and 29294 transitions. [2022-03-03 19:22:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-03 19:22:41,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:41,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:41,127 INFO L225 Difference]: With dead ends: 7489 [2022-03-03 19:22:41,127 INFO L226 Difference]: Without dead ends: 7257 [2022-03-03 19:22:41,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:22:41,128 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 219 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:41,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 366 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:22:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7257 states. [2022-03-03 19:22:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7257 to 6007. [2022-03-03 19:22:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6007 states, 6006 states have (on average 4.092241092241093) internal successors, (24578), 6006 states have internal predecessors, (24578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6007 states to 6007 states and 24578 transitions. [2022-03-03 19:22:41,254 INFO L78 Accepts]: Start accepts. Automaton has 6007 states and 24578 transitions. Word has length 24 [2022-03-03 19:22:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:41,254 INFO L470 AbstractCegarLoop]: Abstraction has 6007 states and 24578 transitions. [2022-03-03 19:22:41,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6007 states and 24578 transitions. [2022-03-03 19:22:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:41,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:41,265 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:41,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:41,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:41,484 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 501563873, now seen corresponding path program 367 times [2022-03-03 19:22:41,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:41,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658291641] [2022-03-03 19:22:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:41,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:41,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658291641] [2022-03-03 19:22:41,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658291641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:41,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684846109] [2022-03-03 19:22:41,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:22:41,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:41,627 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) [2022-03-03 19:22:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-03-03 19:22:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:42,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:22:42,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:42,305 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 149 [2022-03-03 19:22:42,307 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 30 treesize of output 22 [2022-03-03 19:22:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:42,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:42,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 139 [2022-03-03 19:22:42,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:42,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:22:42,746 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 [2022-03-03 19:22:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:42,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684846109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:42,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:42,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:22:42,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454796810] [2022-03-03 19:22:42,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:42,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:22:42,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:22:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:22:42,836 INFO L87 Difference]: Start difference. First operand 6007 states and 24578 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:44,829 INFO L93 Difference]: Finished difference Result 7654 states and 29974 transitions. [2022-03-03 19:22:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:22:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:44,846 INFO L225 Difference]: With dead ends: 7654 [2022-03-03 19:22:44,846 INFO L226 Difference]: Without dead ends: 7458 [2022-03-03 19:22:44,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=418, Invalid=4274, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:22:44,847 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 187 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:44,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 893 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2749 Invalid, 0 Unknown, 220 Unchecked, 0.9s Time] [2022-03-03 19:22:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7458 states. [2022-03-03 19:22:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7458 to 6128. [2022-03-03 19:22:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6128 states, 6127 states have (on average 4.098090419454872) internal successors, (25109), 6127 states have internal predecessors, (25109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:44,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6128 states to 6128 states and 25109 transitions. [2022-03-03 19:22:44,959 INFO L78 Accepts]: Start accepts. Automaton has 6128 states and 25109 transitions. Word has length 24 [2022-03-03 19:22:44,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:44,959 INFO L470 AbstractCegarLoop]: Abstraction has 6128 states and 25109 transitions. [2022-03-03 19:22:44,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:44,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6128 states and 25109 transitions. [2022-03-03 19:22:44,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:44,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:44,969 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:44,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-03-03 19:22:45,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:45,182 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1677054517, now seen corresponding path program 368 times [2022-03-03 19:22:45,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:45,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140480838] [2022-03-03 19:22:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:45,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:45,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:45,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140480838] [2022-03-03 19:22:45,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140480838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:45,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617060047] [2022-03-03 19:22:45,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:22:45,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:45,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:45,458 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) [2022-03-03 19:22:45,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-03-03 19:22:45,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:22:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:45,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:46,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:22:46,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 226 [2022-03-03 19:22:46,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:46,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 198 [2022-03-03 19:22:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:46,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:46,749 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 206 treesize of output 186 [2022-03-03 19:22:47,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:47,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:22:47,026 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 3 treesize of output 1 [2022-03-03 19:22:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:47,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617060047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:47,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:47,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:22:47,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663807877] [2022-03-03 19:22:47,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:47,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:22:47,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:22:47,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:22:47,119 INFO L87 Difference]: Start difference. First operand 6128 states and 25109 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:49,296 INFO L93 Difference]: Finished difference Result 8619 states and 33061 transitions. [2022-03-03 19:22:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:22:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:49,317 INFO L225 Difference]: With dead ends: 8619 [2022-03-03 19:22:49,317 INFO L226 Difference]: Without dead ends: 8435 [2022-03-03 19:22:49,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=511, Invalid=3779, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:22:49,317 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 230 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 3185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 395 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:49,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 905 Invalid, 3185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2734 Invalid, 0 Unknown, 395 Unchecked, 1.0s Time] [2022-03-03 19:22:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8435 states. [2022-03-03 19:22:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8435 to 6219. [2022-03-03 19:22:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6219 states, 6218 states have (on average 4.111450627211322) internal successors, (25565), 6218 states have internal predecessors, (25565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6219 states to 6219 states and 25565 transitions. [2022-03-03 19:22:49,454 INFO L78 Accepts]: Start accepts. Automaton has 6219 states and 25565 transitions. Word has length 24 [2022-03-03 19:22:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:49,454 INFO L470 AbstractCegarLoop]: Abstraction has 6219 states and 25565 transitions. [2022-03-03 19:22:49,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6219 states and 25565 transitions. [2022-03-03 19:22:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:49,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:49,465 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:49,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-03-03 19:22:49,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-03-03 19:22:49,683 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1004346045, now seen corresponding path program 369 times [2022-03-03 19:22:49,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:49,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749723407] [2022-03-03 19:22:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:49,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:49,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:49,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749723407] [2022-03-03 19:22:49,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749723407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:49,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883331379] [2022-03-03 19:22:49,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:22:49,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:49,800 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) [2022-03-03 19:22:49,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-03-03 19:22:50,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:22:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:50,264 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 17 treesize of output 13 [2022-03-03 19:22:50,386 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 224 treesize of output 192 [2022-03-03 19:22:50,390 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 192 treesize of output 172 [2022-03-03 19:22:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:50,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:50,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-03-03 19:22:50,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:50,975 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 17 treesize of output 21 [2022-03-03 19:22:50,983 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 [2022-03-03 19:22:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:51,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883331379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:51,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:51,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-03-03 19:22:51,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842168704] [2022-03-03 19:22:51,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:51,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:22:51,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:51,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:22:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:22:51,031 INFO L87 Difference]: Start difference. First operand 6219 states and 25565 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:51,651 INFO L93 Difference]: Finished difference Result 8149 states and 31587 transitions. [2022-03-03 19:22:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:22:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:51,671 INFO L225 Difference]: With dead ends: 8149 [2022-03-03 19:22:51,672 INFO L226 Difference]: Without dead ends: 7949 [2022-03-03 19:22:51,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-03-03 19:22:51,672 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:51,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 378 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:22:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2022-03-03 19:22:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 6210. [2022-03-03 19:22:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 4.105814140763408) internal successors, (25493), 6209 states have internal predecessors, (25493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 25493 transitions. [2022-03-03 19:22:51,810 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 25493 transitions. Word has length 24 [2022-03-03 19:22:51,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:51,810 INFO L470 AbstractCegarLoop]: Abstraction has 6210 states and 25493 transitions. [2022-03-03 19:22:51,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 25493 transitions. [2022-03-03 19:22:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:51,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:51,822 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:51,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-03-03 19:22:52,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-03-03 19:22:52,041 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:52,041 INFO L85 PathProgramCache]: Analyzing trace with hash -537441183, now seen corresponding path program 370 times [2022-03-03 19:22:52,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:52,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500745890] [2022-03-03 19:22:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:52,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:52,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:52,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500745890] [2022-03-03 19:22:52,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500745890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:52,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111110802] [2022-03-03 19:22:52,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:22:52,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:52,212 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) [2022-03-03 19:22:52,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-03-03 19:22:52,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:22:52,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:52,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:52,815 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 171 treesize of output 153 [2022-03-03 19:22:52,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:52,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-03-03 19:22:52,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:22:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:53,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:53,178 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 3 treesize of output 1 [2022-03-03 19:22:53,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:53,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 184 [2022-03-03 19:22:53,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 159 [2022-03-03 19:22:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:53,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111110802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:53,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:53,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:22:53,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143841788] [2022-03-03 19:22:53,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:53,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:22:53,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:22:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:22:53,630 INFO L87 Difference]: Start difference. First operand 6210 states and 25493 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:22:55,871 INFO L93 Difference]: Finished difference Result 8209 states and 31521 transitions. [2022-03-03 19:22:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:22:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:22:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:22:55,890 INFO L225 Difference]: With dead ends: 8209 [2022-03-03 19:22:55,890 INFO L226 Difference]: Without dead ends: 8005 [2022-03-03 19:22:55,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=592, Invalid=4238, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:22:55,894 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 390 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:22:55,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 622 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:22:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8005 states. [2022-03-03 19:22:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8005 to 6204. [2022-03-03 19:22:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6204 states, 6203 states have (on average 4.094147992906658) internal successors, (25396), 6203 states have internal predecessors, (25396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6204 states to 6204 states and 25396 transitions. [2022-03-03 19:22:56,035 INFO L78 Accepts]: Start accepts. Automaton has 6204 states and 25396 transitions. Word has length 24 [2022-03-03 19:22:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:22:56,036 INFO L470 AbstractCegarLoop]: Abstraction has 6204 states and 25396 transitions. [2022-03-03 19:22:56,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:22:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 6204 states and 25396 transitions. [2022-03-03 19:22:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:22:56,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:22:56,048 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:22:56,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-03-03 19:22:56,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-03-03 19:22:56,249 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:22:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:22:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1076125551, now seen corresponding path program 371 times [2022-03-03 19:22:56,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:22:56,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755315329] [2022-03-03 19:22:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:22:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:22:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:22:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:22:56,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:22:56,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755315329] [2022-03-03 19:22:56,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755315329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:22:56,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444740441] [2022-03-03 19:22:56,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:22:56,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:22:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:22:56,461 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) [2022-03-03 19:22:56,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-03-03 19:22:56,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:22:56,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:22:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:22:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:22:57,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:22:57,286 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 17 treesize of output 13 [2022-03-03 19:22:57,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:22:57,288 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2022-03-03 19:22:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:57,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:22:57,478 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 3 treesize of output 1 [2022-03-03 19:22:57,563 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 159 treesize of output 139 [2022-03-03 19:22:57,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:22:57,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 136 [2022-03-03 19:22:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:22:57,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444740441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:22:57,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:22:57,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:22:57,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084695981] [2022-03-03 19:22:57,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:22:57,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:22:57,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:22:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:22:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:22:57,838 INFO L87 Difference]: Start difference. First operand 6204 states and 25396 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:00,473 INFO L93 Difference]: Finished difference Result 8310 states and 31390 transitions. [2022-03-03 19:23:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:23:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:00,492 INFO L225 Difference]: With dead ends: 8310 [2022-03-03 19:23:00,493 INFO L226 Difference]: Without dead ends: 7991 [2022-03-03 19:23:00,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=723, Invalid=6083, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:23:00,495 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 429 mSDsluCounter, 1600 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 2965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:00,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 765 Invalid, 2965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:23:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7991 states. [2022-03-03 19:23:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7991 to 6192. [2022-03-03 19:23:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 4.071555483766758) internal successors, (25207), 6191 states have internal predecessors, (25207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 25207 transitions. [2022-03-03 19:23:00,632 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 25207 transitions. Word has length 24 [2022-03-03 19:23:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:00,632 INFO L470 AbstractCegarLoop]: Abstraction has 6192 states and 25207 transitions. [2022-03-03 19:23:00,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 25207 transitions. [2022-03-03 19:23:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:00,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:00,644 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:00,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-03-03 19:23:00,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-03-03 19:23:00,867 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1567753171, now seen corresponding path program 372 times [2022-03-03 19:23:00,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:00,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134216507] [2022-03-03 19:23:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:01,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:01,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134216507] [2022-03-03 19:23:01,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134216507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:01,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549587358] [2022-03-03 19:23:01,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:23:01,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:01,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:01,055 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:01,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-03-03 19:23:01,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:23:01,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:23:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:01,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:01,637 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 145 treesize of output 125 [2022-03-03 19:23:01,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:23:01,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-03 19:23:01,867 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 17 treesize of output 13 [2022-03-03 19:23:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:23:01,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:02,065 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 3 treesize of output 1 [2022-03-03 19:23:02,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:02,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 193 [2022-03-03 19:23:02,209 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 186 treesize of output 166 [2022-03-03 19:23:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:23:02,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549587358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:23:02,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:23:02,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:23:02,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514744580] [2022-03-03 19:23:02,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:23:02,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:23:02,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:23:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:23:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:23:02,511 INFO L87 Difference]: Start difference. First operand 6192 states and 25207 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:04,451 INFO L93 Difference]: Finished difference Result 8191 states and 31380 transitions. [2022-03-03 19:23:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:23:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:04,469 INFO L225 Difference]: With dead ends: 8191 [2022-03-03 19:23:04,469 INFO L226 Difference]: Without dead ends: 8001 [2022-03-03 19:23:04,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:23:04,470 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 240 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:04,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 542 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2040 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:23:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2022-03-03 19:23:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6140. [2022-03-03 19:23:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6140 states, 6139 states have (on average 4.0591301514904705) internal successors, (24919), 6139 states have internal predecessors, (24919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6140 states to 6140 states and 24919 transitions. [2022-03-03 19:23:04,588 INFO L78 Accepts]: Start accepts. Automaton has 6140 states and 24919 transitions. Word has length 24 [2022-03-03 19:23:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:04,588 INFO L470 AbstractCegarLoop]: Abstraction has 6140 states and 24919 transitions. [2022-03-03 19:23:04,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6140 states and 24919 transitions. [2022-03-03 19:23:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:04,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:04,599 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:04,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Forceful destruction successful, exit code 0 [2022-03-03 19:23:04,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2022-03-03 19:23:04,800 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -372803211, now seen corresponding path program 373 times [2022-03-03 19:23:04,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:04,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678159677] [2022-03-03 19:23:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:04,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:04,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:04,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678159677] [2022-03-03 19:23:04,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678159677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:04,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103904843] [2022-03-03 19:23:04,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:23:04,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:04,927 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:04,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-03-03 19:23:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:05,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:05,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:05,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 145 [2022-03-03 19:23:05,685 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 33 treesize of output 27 [2022-03-03 19:23:05,687 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 17 treesize of output 13 [2022-03-03 19:23:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:23:05,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:05,801 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 3 treesize of output 1 [2022-03-03 19:23:05,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:05,939 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 186 [2022-03-03 19:23:05,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:23:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:23:06,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103904843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:23:06,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:23:06,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-03-03 19:23:06,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772850453] [2022-03-03 19:23:06,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:23:06,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:23:06,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:23:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:23:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:23:06,224 INFO L87 Difference]: Start difference. First operand 6140 states and 24919 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:07,038 INFO L93 Difference]: Finished difference Result 7324 states and 28345 transitions. [2022-03-03 19:23:07,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:23:07,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:07,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:07,055 INFO L225 Difference]: With dead ends: 7324 [2022-03-03 19:23:07,055 INFO L226 Difference]: Without dead ends: 7066 [2022-03-03 19:23:07,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:23:07,056 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:07,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 292 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:23:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7066 states. [2022-03-03 19:23:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7066 to 6134. [2022-03-03 19:23:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6134 states, 6133 states have (on average 4.046469916843306) internal successors, (24817), 6133 states have internal predecessors, (24817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6134 states to 6134 states and 24817 transitions. [2022-03-03 19:23:07,167 INFO L78 Accepts]: Start accepts. Automaton has 6134 states and 24817 transitions. Word has length 24 [2022-03-03 19:23:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:07,167 INFO L470 AbstractCegarLoop]: Abstraction has 6134 states and 24817 transitions. [2022-03-03 19:23:07,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6134 states and 24817 transitions. [2022-03-03 19:23:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:07,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:07,177 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:07,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Forceful destruction successful, exit code 0 [2022-03-03 19:23:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-03-03 19:23:07,391 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -218365693, now seen corresponding path program 374 times [2022-03-03 19:23:07,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:07,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715628761] [2022-03-03 19:23:07,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:07,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:07,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:07,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715628761] [2022-03-03 19:23:07,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715628761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:07,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147858429] [2022-03-03 19:23:07,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:23:07,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:07,537 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:07,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-03-03 19:23:07,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:23:07,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:23:07,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:08,042 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 272 treesize of output 232 [2022-03-03 19:23:08,346 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 17 treesize of output 13 [2022-03-03 19:23:08,348 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 33 treesize of output 27 [2022-03-03 19:23:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:23:08,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:08,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:23:08,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-03 19:23:08,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:08,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 159 [2022-03-03 19:23:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-03 19:23:08,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147858429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:23:08,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:23:08,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-03-03 19:23:08,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795060787] [2022-03-03 19:23:08,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:23:08,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-03 19:23:08,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:23:08,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-03 19:23:08,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:23:08,891 INFO L87 Difference]: Start difference. First operand 6134 states and 24817 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:09,685 INFO L93 Difference]: Finished difference Result 6950 states and 27118 transitions. [2022-03-03 19:23:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:23:09,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:09,700 INFO L225 Difference]: With dead ends: 6950 [2022-03-03 19:23:09,700 INFO L226 Difference]: Without dead ends: 6668 [2022-03-03 19:23:09,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:23:09,701 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:09,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 398 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:23:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6668 states. [2022-03-03 19:23:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6668 to 6275. [2022-03-03 19:23:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 4.019764105833599) internal successors, (25220), 6274 states have internal predecessors, (25220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 25220 transitions. [2022-03-03 19:23:09,804 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 25220 transitions. Word has length 24 [2022-03-03 19:23:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:09,804 INFO L470 AbstractCegarLoop]: Abstraction has 6275 states and 25220 transitions. [2022-03-03 19:23:09,804 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) [2022-03-03 19:23:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 25220 transitions. [2022-03-03 19:23:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:09,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:09,815 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:09,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-03-03 19:23:10,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2022-03-03 19:23:10,023 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash -794111297, now seen corresponding path program 375 times [2022-03-03 19:23:10,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:10,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243699897] [2022-03-03 19:23:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:10,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:10,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:10,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243699897] [2022-03-03 19:23:10,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243699897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:10,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113217730] [2022-03-03 19:23:10,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:23:10,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:10,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:10,347 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:10,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-03-03 19:23:10,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:23:10,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:23:10,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:10,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:10,945 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 17 treesize of output 13 [2022-03-03 19:23:11,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:23:11,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 149 [2022-03-03 19:23:11,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-03 19:23:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:11,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:11,374 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 159 treesize of output 139 [2022-03-03 19:23:11,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:11,684 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:23:11,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:23:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:11,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113217730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:23:11,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:23:11,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:23:11,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058936520] [2022-03-03 19:23:11,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:23:11,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:23:11,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:23:11,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:23:11,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:23:11,804 INFO L87 Difference]: Start difference. First operand 6275 states and 25220 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:15,317 INFO L93 Difference]: Finished difference Result 7500 states and 29060 transitions. [2022-03-03 19:23:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:23:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:15,332 INFO L225 Difference]: With dead ends: 7500 [2022-03-03 19:23:15,332 INFO L226 Difference]: Without dead ends: 7463 [2022-03-03 19:23:15,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=757, Invalid=5885, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:23:15,333 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 188 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:15,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 853 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2262 Invalid, 0 Unknown, 150 Unchecked, 1.0s Time] [2022-03-03 19:23:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2022-03-03 19:23:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 6275. [2022-03-03 19:23:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6275 states, 6274 states have (on average 4.019764105833599) internal successors, (25220), 6274 states have internal predecessors, (25220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6275 states to 6275 states and 25220 transitions. [2022-03-03 19:23:15,434 INFO L78 Accepts]: Start accepts. Automaton has 6275 states and 25220 transitions. Word has length 24 [2022-03-03 19:23:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:15,434 INFO L470 AbstractCegarLoop]: Abstraction has 6275 states and 25220 transitions. [2022-03-03 19:23:15,434 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) [2022-03-03 19:23:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6275 states and 25220 transitions. [2022-03-03 19:23:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:15,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:15,445 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:15,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-03-03 19:23:15,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:15,658 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:15,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash 700491667, now seen corresponding path program 376 times [2022-03-03 19:23:15,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:15,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038286233] [2022-03-03 19:23:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:15,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:15,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038286233] [2022-03-03 19:23:15,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038286233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:15,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713218228] [2022-03-03 19:23:15,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:23:15,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:15,888 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:15,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-03-03 19:23:16,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:23:16,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:23:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:16,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:23:16,613 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 276 treesize of output 244 [2022-03-03 19:23:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:23:16,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 206 [2022-03-03 19:23:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:16,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:16,830 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 247 treesize of output 223 [2022-03-03 19:23:17,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:17,073 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:23:17,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:23:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:17,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713218228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:23:17,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:23:17,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2022-03-03 19:23:17,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713036347] [2022-03-03 19:23:17,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:23:17,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:23:17,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:23:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:23:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:23:17,176 INFO L87 Difference]: Start difference. First operand 6275 states and 25220 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:19,927 INFO L93 Difference]: Finished difference Result 8346 states and 31810 transitions. [2022-03-03 19:23:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 19:23:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:19,946 INFO L225 Difference]: With dead ends: 8346 [2022-03-03 19:23:19,946 INFO L226 Difference]: Without dead ends: 8125 [2022-03-03 19:23:19,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=646, Invalid=5360, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:23:19,947 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 249 mSDsluCounter, 2200 mSDsCounter, 0 mSdLazyCounter, 2613 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 817 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:19,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1077 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2613 Invalid, 0 Unknown, 817 Unchecked, 0.9s Time] [2022-03-03 19:23:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8125 states. [2022-03-03 19:23:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8125 to 6321. [2022-03-03 19:23:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 6320 states have (on average 4.02120253164557) internal successors, (25414), 6320 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:20,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 25414 transitions. [2022-03-03 19:23:20,073 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 25414 transitions. Word has length 24 [2022-03-03 19:23:20,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:20,073 INFO L470 AbstractCegarLoop]: Abstraction has 6321 states and 25414 transitions. [2022-03-03 19:23:20,073 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) [2022-03-03 19:23:20,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 25414 transitions. [2022-03-03 19:23:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:20,084 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:20,084 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:20,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2022-03-03 19:23:20,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:20,287 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:20,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1810913095, now seen corresponding path program 377 times [2022-03-03 19:23:20,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:20,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756631622] [2022-03-03 19:23:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:20,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:20,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756631622] [2022-03-03 19:23:20,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756631622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:20,439 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815000077] [2022-03-03 19:23:20,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:23:20,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:20,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:20,440 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:20,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-03-03 19:23:20,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:23:20,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:23:20,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:20,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:23:21,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2022-03-03 19:23:21,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-03-03 19:23:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:21,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:21,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 164 [2022-03-03 19:23:21,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:21,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-03-03 19:23:21,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2022-03-03 19:23:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:21,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815000077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:23:21,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:23:21,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 21 [2022-03-03 19:23:21,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275148225] [2022-03-03 19:23:21,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:23:21,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:23:21,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:23:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:23:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:23:21,605 INFO L87 Difference]: Start difference. First operand 6321 states and 25414 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:23:22,296 INFO L93 Difference]: Finished difference Result 7513 states and 29097 transitions. [2022-03-03 19:23:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:23:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:23:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:23:22,311 INFO L225 Difference]: With dead ends: 7513 [2022-03-03 19:23:22,311 INFO L226 Difference]: Without dead ends: 7456 [2022-03-03 19:23:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:23:22,312 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:23:22,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 429 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:23:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-03-03 19:23:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6267. [2022-03-03 19:23:22,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6267 states, 6266 states have (on average 4.022023619533993) internal successors, (25202), 6266 states have internal predecessors, (25202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:23:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6267 states to 6267 states and 25202 transitions. [2022-03-03 19:23:22,411 INFO L78 Accepts]: Start accepts. Automaton has 6267 states and 25202 transitions. Word has length 24 [2022-03-03 19:23:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:23:22,411 INFO L470 AbstractCegarLoop]: Abstraction has 6267 states and 25202 transitions. [2022-03-03 19:23:22,411 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) [2022-03-03 19:23:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6267 states and 25202 transitions. [2022-03-03 19:23:22,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:23:22,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:23:22,422 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:23:22,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-03-03 19:23:22,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:22,635 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:23:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:23:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1847553732, now seen corresponding path program 378 times [2022-03-03 19:23:22,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:23:22,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697196321] [2022-03-03 19:23:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:23:22,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:23:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:23:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:23:22,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:23:22,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697196321] [2022-03-03 19:23:22,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697196321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:23:22,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25023568] [2022-03-03 19:23:22,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:23:22,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:23:22,775 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:23:22,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-03-03 19:23:23,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:23:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:23:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:23:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:23:23,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:23:23,503 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 181 treesize of output 157 [2022-03-03 19:23:23,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:23:23,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 145 [2022-03-03 19:23:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:23:23,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:23:23,691 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 188 treesize of output 168 [2022-03-03 19:23:23,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:23:23,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 Received shutdown request... [2022-03-03 19:23:23,957 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 19:23:23,960 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-03 19:23:23,965 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 [2022-03-03 19:23:23,977 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:23:23,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Forceful destruction successful, exit code 0 [2022-03-03 19:23:24,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:23:24,165 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. [2022-03-03 19:23:24,167 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-03 19:23:24,167 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-03 19:23:24,167 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-03 19:23:24,169 INFO L732 BasicCegarLoop]: Path program histogram: [378, 6, 4, 3, 3, 1, 1, 1] [2022-03-03 19:23:24,170 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:23:24,170 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:23:24,171 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:23:24 BasicIcfg [2022-03-03 19:23:24,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:23:24,171 INFO L158 Benchmark]: Toolchain (without parser) took 912057.30ms. Allocated memory was 203.4MB in the beginning and 879.8MB in the end (delta: 676.3MB). Free memory was 168.5MB in the beginning and 605.3MB in the end (delta: -436.8MB). Peak memory consumption was 240.2MB. Max. memory is 8.0GB. [2022-03-03 19:23:24,172 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 170.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:23:24,172 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.49ms. Allocated memory is still 203.4MB. Free memory was 168.5MB in the beginning and 167.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:23:24,172 INFO L158 Benchmark]: Boogie Preprocessor took 12.84ms. Allocated memory is still 203.4MB. Free memory was 167.0MB in the beginning and 165.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:23:24,172 INFO L158 Benchmark]: RCFGBuilder took 375.86ms. Allocated memory is still 203.4MB. Free memory was 165.8MB in the beginning and 149.2MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-03-03 19:23:24,172 INFO L158 Benchmark]: TraceAbstraction took 911639.79ms. Allocated memory was 203.4MB in the beginning and 879.8MB in the end (delta: 676.3MB). Free memory was 148.7MB in the beginning and 605.3MB in the end (delta: -456.6MB). Peak memory consumption was 220.3MB. Max. memory is 8.0GB. [2022-03-03 19:23:24,172 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 170.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.49ms. Allocated memory is still 203.4MB. Free memory was 168.5MB in the beginning and 167.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.84ms. Allocated memory is still 203.4MB. Free memory was 167.0MB in the beginning and 165.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 375.86ms. Allocated memory is still 203.4MB. Free memory was 165.8MB in the beginning and 149.2MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 911639.79ms. Allocated memory was 203.4MB in the beginning and 879.8MB in the end (delta: 676.3MB). Free memory was 148.7MB in the beginning and 605.3MB in the end (delta: -456.6MB). Peak memory consumption was 220.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - 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 analyzing trace of length 25 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - 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 analyzing trace of length 25 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - 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 analyzing trace of length 25 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 911.5s, OverallIterations: 397, TraceHistogramMax: 3, PathProgramHistogramMax: 378, EmptinessCheckTime: 1.0s, AutomataDifference: 352.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69562 SdHoareTripleChecker+Valid, 139.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69562 mSDsluCounter, 148605 SdHoareTripleChecker+Invalid, 117.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 40128 IncrementalHoareTripleChecker+Unchecked, 319479 mSDsCounter, 16279 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 437977 IncrementalHoareTripleChecker+Invalid, 494384 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16279 mSolverCounterUnsat, 12018 mSDtfsCounter, 437977 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29993 GetRequests, 14006 SyntacticMatches, 557 SemanticMatches, 15430 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 243998 ImplicationChecksByTransitivity, 270.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6353occurred in iteration=376, InterpolantAutomatonStates: 11051, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.5s AutomataMinimizationTime, 396 MinimizatonAttempts, 220047 StatesRemovedByMinimization, 391 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.0s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 374.8s InterpolantComputationTime, 17189 NumberOfCodeBlocks, 17171 NumberOfCodeBlocksAsserted, 1230 NumberOfCheckSat, 24495 ConstructedInterpolants, 793 QuantifiedInterpolants, 215478 SizeOfPredicates, 4601 NumberOfNonLiveVariables, 39694 ConjunctsInSsa, 7678 ConjunctsInUnsatCore, 1152 InterpolantComputations, 18 PerfectInterpolantSequences, 2307/8958 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