/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 07:30:14,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 07:30:14,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 07:30:14,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 07:30:14,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 07:30:14,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 07:30:14,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 07:30:14,111 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 [2022-01-18 07:30:14,138 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 07:30:14,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 07:30:14,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 07:30:14,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 07:30:14,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 07:30:14,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 07:30:14,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 07:30:14,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 07:30:14,140 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 07:30:14,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 07:30:14,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 07:30:14,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 07:30:14,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 07:30:14,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 07:30:14,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 07:30:14,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 07:30:14,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 07:30:14,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 07:30:14,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:30:14,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 07:30:14,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 07:30:14,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 07:30:14,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 07:30:14,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 07:30:14,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 07:30:14,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 07:30:14,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 07:30:14,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 07:30:14,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 07:30:14,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 07:30:14,355 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 07:30:14,358 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 07:30:14,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl [2022-01-18 07:30:14,359 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-4-semi-Q67.wvr.bpl' [2022-01-18 07:30:14,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 07:30:14,388 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 07:30:14,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 07:30:14,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 07:30:14,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 07:30:14,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,406 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 07:30:14,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 07:30:14,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 07:30:14,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 07:30:14,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 07:30:14,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 07:30:14,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 07:30:14,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 07:30:14,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 07:30:14,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/1) ... [2022-01-18 07:30:14,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 07:30:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:14,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 07:30:14,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 07:30:14,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 07:30:14,477 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 07:30:14,477 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 07:30:14,477 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 07:30:14,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 07:30:14,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 07:30:14,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 07:30:14,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 07:30:14,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 07:30:14,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 07:30:14,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 07:30:14,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 07:30:14,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 07:30:14,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 07:30:14,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 07:30:14,481 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 07:30:14,512 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 07:30:14,513 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 07:30:14,595 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 07:30:14,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 07:30:14,608 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 07:30:14,609 INFO L202 PluginConnector]: Adding new model counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:30:14 BoogieIcfgContainer [2022-01-18 07:30:14,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 07:30:14,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 07:30:14,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 07:30:14,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 07:30:14,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 07:30:14" (1/2) ... [2022-01-18 07:30:14,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2267ccd4 and model type counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 07:30:14, skipping insertion in model container [2022-01-18 07:30:14,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-4-semi-Q67.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 07:30:14" (2/2) ... [2022-01-18 07:30:14,614 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-4-semi-Q67.wvr.bpl [2022-01-18 07:30:14,617 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 07:30:14,617 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 07:30:14,617 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 07:30:14,617 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 07:30:14,664 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-18 07:30:14,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 07:30:14,703 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 07:30:14,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 07:30:14,714 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-01-18 07:30:14,795 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:14,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 07:30:14,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:14,811 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, 1] [2022-01-18 07:30:14,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:14,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash 792171695, now seen corresponding path program 1 times [2022-01-18 07:30:14,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:14,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127382638] [2022-01-18 07:30:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:14,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:14,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:14,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127382638] [2022-01-18 07:30:14,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127382638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:14,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:14,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 07:30:14,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069173026] [2022-01-18 07:30:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:14,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 07:30:14,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 07:30:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 07:30:14,938 INFO L87 Difference]: Start difference. First operand has 431 states, 430 states have (on average 3.8488372093023258) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:14,998 INFO L93 Difference]: Finished difference Result 856 states and 3119 transitions. [2022-01-18 07:30:14,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 07:30:15,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 07:30:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:15,014 INFO L225 Difference]: With dead ends: 856 [2022-01-18 07:30:15,014 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 07:30:15,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 07:30:15,024 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:15,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 07:30:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 697. [2022-01-18 07:30:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.7241379310344827) internal successors, (2592), 696 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2592 transitions. [2022-01-18 07:30:15,149 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2592 transitions. Word has length 21 [2022-01-18 07:30:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:15,150 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2592 transitions. [2022-01-18 07:30:15,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2592 transitions. [2022-01-18 07:30:15,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:30:15,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:15,153 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, 1, 1, 1] [2022-01-18 07:30:15,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 07:30:15,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1463348563, now seen corresponding path program 1 times [2022-01-18 07:30:15,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:15,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124339778] [2022-01-18 07:30:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:15,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:15,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:15,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124339778] [2022-01-18 07:30:15,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124339778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:15,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785050805] [2022-01-18 07:30:15,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:15,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:15,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:15,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:15,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 07:30:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 07:30:15,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:15,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785050805] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:15,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 07:30:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-18 07:30:15,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020908769] [2022-01-18 07:30:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:15,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:30:15,524 INFO L87 Difference]: Start difference. First operand 697 states and 2592 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:15,639 INFO L93 Difference]: Finished difference Result 1568 states and 5771 transitions. [2022-01-18 07:30:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:30:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:15,648 INFO L225 Difference]: With dead ends: 1568 [2022-01-18 07:30:15,649 INFO L226 Difference]: Without dead ends: 1568 [2022-01-18 07:30:15,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 07:30:15,650 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:15,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 73 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-01-18 07:30:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 817. [2022-01-18 07:30:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.7830882352941178) internal successors, (3087), 816 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 3087 transitions. [2022-01-18 07:30:15,697 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 3087 transitions. Word has length 23 [2022-01-18 07:30:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:15,697 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 3087 transitions. [2022-01-18 07:30:15,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 3087 transitions. [2022-01-18 07:30:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:30:15,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:15,700 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, 1, 1, 1] [2022-01-18 07:30:15,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:15,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:15,916 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1782373011, now seen corresponding path program 1 times [2022-01-18 07:30:15,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:15,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929391768] [2022-01-18 07:30:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:15,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:15,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929391768] [2022-01-18 07:30:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929391768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:15,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:15,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:30:15,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43665574] [2022-01-18 07:30:15,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:15,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:15,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:30:15,972 INFO L87 Difference]: Start difference. First operand 817 states and 3087 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:16,034 INFO L93 Difference]: Finished difference Result 911 states and 3304 transitions. [2022-01-18 07:30:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 07:30:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:30:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:16,039 INFO L225 Difference]: With dead ends: 911 [2022-01-18 07:30:16,039 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 07:30:16,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:16,042 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:16,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 07:30:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 785. [2022-01-18 07:30:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.7997448979591835) internal successors, (2979), 784 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2979 transitions. [2022-01-18 07:30:16,073 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2979 transitions. Word has length 23 [2022-01-18 07:30:16,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:16,073 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2979 transitions. [2022-01-18 07:30:16,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,073 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2979 transitions. [2022-01-18 07:30:16,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:30:16,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:16,076 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, 1, 1, 1] [2022-01-18 07:30:16,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 07:30:16,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:16,079 INFO L85 PathProgramCache]: Analyzing trace with hash 736027925, now seen corresponding path program 2 times [2022-01-18 07:30:16,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:16,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665531200] [2022-01-18 07:30:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:16,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:16,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:16,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665531200] [2022-01-18 07:30:16,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665531200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:16,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:16,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:30:16,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726030261] [2022-01-18 07:30:16,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:16,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:16,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:30:16,141 INFO L87 Difference]: Start difference. First operand 785 states and 2979 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:16,221 INFO L93 Difference]: Finished difference Result 1413 states and 5150 transitions. [2022-01-18 07:30:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 07:30:16,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:30:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:16,231 INFO L225 Difference]: With dead ends: 1413 [2022-01-18 07:30:16,231 INFO L226 Difference]: Without dead ends: 1413 [2022-01-18 07:30:16,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:16,238 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:16,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 75 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-01-18 07:30:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 869. [2022-01-18 07:30:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.743087557603687) internal successors, (3249), 868 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3249 transitions. [2022-01-18 07:30:16,294 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3249 transitions. Word has length 23 [2022-01-18 07:30:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:16,294 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 3249 transitions. [2022-01-18 07:30:16,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3249 transitions. [2022-01-18 07:30:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:30:16,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:16,296 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, 1, 1, 1] [2022-01-18 07:30:16,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 07:30:16,297 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2123902699, now seen corresponding path program 2 times [2022-01-18 07:30:16,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:16,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148567522] [2022-01-18 07:30:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:16,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:16,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148567522] [2022-01-18 07:30:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148567522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:16,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:16,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 07:30:16,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519940242] [2022-01-18 07:30:16,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:16,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 07:30:16,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 07:30:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:16,388 INFO L87 Difference]: Start difference. First operand 869 states and 3249 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:16,475 INFO L93 Difference]: Finished difference Result 1346 states and 4899 transitions. [2022-01-18 07:30:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:30:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:16,481 INFO L225 Difference]: With dead ends: 1346 [2022-01-18 07:30:16,481 INFO L226 Difference]: Without dead ends: 1310 [2022-01-18 07:30:16,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 07:30:16,482 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 78 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:16,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-01-18 07:30:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 915. [2022-01-18 07:30:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.7308533916849016) internal successors, (3410), 914 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3410 transitions. [2022-01-18 07:30:16,504 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3410 transitions. Word has length 23 [2022-01-18 07:30:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:16,505 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 3410 transitions. [2022-01-18 07:30:16,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3410 transitions. [2022-01-18 07:30:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:30:16,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:16,512 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, 1, 1, 1] [2022-01-18 07:30:16,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 07:30:16,512 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1980678467, now seen corresponding path program 3 times [2022-01-18 07:30:16,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:16,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704136631] [2022-01-18 07:30:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:16,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:16,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:16,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704136631] [2022-01-18 07:30:16,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704136631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:16,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:16,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:30:16,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366120985] [2022-01-18 07:30:16,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:16,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:16,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:16,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:30:16,558 INFO L87 Difference]: Start difference. First operand 915 states and 3410 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:16,615 INFO L93 Difference]: Finished difference Result 1446 states and 5318 transitions. [2022-01-18 07:30:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 07:30:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:30:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:16,621 INFO L225 Difference]: With dead ends: 1446 [2022-01-18 07:30:16,621 INFO L226 Difference]: Without dead ends: 1424 [2022-01-18 07:30:16,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:16,623 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:16,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 49 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-18 07:30:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1117. [2022-01-18 07:30:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 3.8082437275985663) internal successors, (4250), 1116 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 4250 transitions. [2022-01-18 07:30:16,648 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 4250 transitions. Word has length 23 [2022-01-18 07:30:16,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:16,649 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 4250 transitions. [2022-01-18 07:30:16,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 4250 transitions. [2022-01-18 07:30:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 07:30:16,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:16,651 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, 1, 1, 1] [2022-01-18 07:30:16,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 07:30:16,652 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1924327101, now seen corresponding path program 4 times [2022-01-18 07:30:16,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:16,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249081937] [2022-01-18 07:30:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:16,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:16,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249081937] [2022-01-18 07:30:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249081937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:16,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:16,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 07:30:16,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897631313] [2022-01-18 07:30:16,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:16,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 07:30:16,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 07:30:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:16,723 INFO L87 Difference]: Start difference. First operand 1117 states and 4250 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:16,765 INFO L93 Difference]: Finished difference Result 1471 states and 5538 transitions. [2022-01-18 07:30:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 07:30:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 07:30:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:16,773 INFO L225 Difference]: With dead ends: 1471 [2022-01-18 07:30:16,773 INFO L226 Difference]: Without dead ends: 1471 [2022-01-18 07:30:16,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:16,774 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:16,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 51 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-01-18 07:30:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1137. [2022-01-18 07:30:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.8221830985915495) internal successors, (4342), 1136 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 4342 transitions. [2022-01-18 07:30:16,802 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 4342 transitions. Word has length 23 [2022-01-18 07:30:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:16,802 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 4342 transitions. [2022-01-18 07:30:16,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 4342 transitions. [2022-01-18 07:30:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 07:30:16,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:16,806 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, 1, 1, 1, 1, 1] [2022-01-18 07:30:16,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 07:30:16,806 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:16,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1459606317, now seen corresponding path program 1 times [2022-01-18 07:30:16,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:16,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360591892] [2022-01-18 07:30:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:16,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:16,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360591892] [2022-01-18 07:30:16,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360591892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:16,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574003700] [2022-01-18 07:30:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:16,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:16,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:16,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:16,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 07:30:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:16,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 07:30:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:16,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574003700] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:17,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 07:30:17,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-18 07:30:17,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541426704] [2022-01-18 07:30:17,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:17,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:17,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:17,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:30:17,024 INFO L87 Difference]: Start difference. First operand 1137 states and 4342 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:17,092 INFO L93 Difference]: Finished difference Result 1771 states and 6544 transitions. [2022-01-18 07:30:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 07:30:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:17,101 INFO L225 Difference]: With dead ends: 1771 [2022-01-18 07:30:17,101 INFO L226 Difference]: Without dead ends: 1692 [2022-01-18 07:30:17,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-18 07:30:17,101 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:17,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 60 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-01-18 07:30:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1058. [2022-01-18 07:30:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.7899716177861875) internal successors, (4006), 1057 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 4006 transitions. [2022-01-18 07:30:17,147 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 4006 transitions. Word has length 25 [2022-01-18 07:30:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:17,147 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 4006 transitions. [2022-01-18 07:30:17,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 4006 transitions. [2022-01-18 07:30:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 07:30:17,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:17,150 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, 1, 1, 1, 1, 1] [2022-01-18 07:30:17,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:17,352 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,SelfDestructingSolverStorable7 [2022-01-18 07:30:17,352 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 966321903, now seen corresponding path program 2 times [2022-01-18 07:30:17,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:17,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253835960] [2022-01-18 07:30:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:17,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:17,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253835960] [2022-01-18 07:30:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253835960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:17,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:17,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:30:17,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073518991] [2022-01-18 07:30:17,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:17,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:17,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:30:17,397 INFO L87 Difference]: Start difference. First operand 1058 states and 4006 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:17,434 INFO L93 Difference]: Finished difference Result 1311 states and 4876 transitions. [2022-01-18 07:30:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 07:30:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 07:30:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:17,440 INFO L225 Difference]: With dead ends: 1311 [2022-01-18 07:30:17,440 INFO L226 Difference]: Without dead ends: 1311 [2022-01-18 07:30:17,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:30:17,441 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:17,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 50 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-01-18 07:30:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1077. [2022-01-18 07:30:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 3.774163568773234) internal successors, (4061), 1076 states have internal predecessors, (4061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 4061 transitions. [2022-01-18 07:30:17,461 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 4061 transitions. Word has length 25 [2022-01-18 07:30:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:17,461 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 4061 transitions. [2022-01-18 07:30:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 4061 transitions. [2022-01-18 07:30:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 07:30:17,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:17,463 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, 1, 1, 1, 1, 1] [2022-01-18 07:30:17,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 07:30:17,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1528957573, now seen corresponding path program 1 times [2022-01-18 07:30:17,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:17,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395551219] [2022-01-18 07:30:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:17,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:17,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395551219] [2022-01-18 07:30:17,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395551219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:17,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138143951] [2022-01-18 07:30:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:17,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:17,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:17,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:17,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 07:30:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 07:30:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:17,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:17,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138143951] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:17,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 07:30:17,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2022-01-18 07:30:17,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668740955] [2022-01-18 07:30:17,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:17,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:17,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-18 07:30:17,661 INFO L87 Difference]: Start difference. First operand 1077 states and 4061 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:17,725 INFO L93 Difference]: Finished difference Result 1792 states and 6625 transitions. [2022-01-18 07:30:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 07:30:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:17,733 INFO L225 Difference]: With dead ends: 1792 [2022-01-18 07:30:17,733 INFO L226 Difference]: Without dead ends: 1750 [2022-01-18 07:30:17,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:30:17,733 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:17,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 72 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:17,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-01-18 07:30:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1127. [2022-01-18 07:30:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 3.7886323268206037) internal successors, (4266), 1126 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 4266 transitions. [2022-01-18 07:30:17,756 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 4266 transitions. Word has length 25 [2022-01-18 07:30:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 4266 transitions. [2022-01-18 07:30:17,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 4266 transitions. [2022-01-18 07:30:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 07:30:17,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:17,759 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, 1, 1, 1, 1, 1] [2022-01-18 07:30:17,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:17,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:17,974 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1454208321, now seen corresponding path program 3 times [2022-01-18 07:30:17,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:17,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739156344] [2022-01-18 07:30:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:17,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:17,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:17,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739156344] [2022-01-18 07:30:17,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739156344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 07:30:17,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 07:30:17,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 07:30:17,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618526162] [2022-01-18 07:30:17,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:17,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:17,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 07:30:17,997 INFO L87 Difference]: Start difference. First operand 1127 states and 4266 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:18,047 INFO L93 Difference]: Finished difference Result 1118 states and 4210 transitions. [2022-01-18 07:30:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 07:30:18,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 07:30:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:18,062 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 07:30:18,062 INFO L226 Difference]: Without dead ends: 938 [2022-01-18 07:30:18,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:18,063 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:18,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 69 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-01-18 07:30:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 858. [2022-01-18 07:30:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.8751458576429405) internal successors, (3321), 857 states have internal predecessors, (3321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3321 transitions. [2022-01-18 07:30:18,078 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3321 transitions. Word has length 25 [2022-01-18 07:30:18,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:18,079 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 3321 transitions. [2022-01-18 07:30:18,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3321 transitions. [2022-01-18 07:30:18,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 07:30:18,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:18,081 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:18,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 07:30:18,081 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:18,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash -149664725, now seen corresponding path program 1 times [2022-01-18 07:30:18,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525908199] [2022-01-18 07:30:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:18,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:18,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525908199] [2022-01-18 07:30:18,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525908199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:18,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197229194] [2022-01-18 07:30:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:18,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:18,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:18,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 07:30:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:18,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 07:30:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:18,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:18,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197229194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:18,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:18,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-18 07:30:18,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851018346] [2022-01-18 07:30:18,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:18,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 07:30:18,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:18,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 07:30:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 07:30:18,221 INFO L87 Difference]: Start difference. First operand 858 states and 3321 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:18,281 INFO L93 Difference]: Finished difference Result 2765 states and 10475 transitions. [2022-01-18 07:30:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 07:30:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:18,289 INFO L225 Difference]: With dead ends: 2765 [2022-01-18 07:30:18,289 INFO L226 Difference]: Without dead ends: 2631 [2022-01-18 07:30:18,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 07:30:18,290 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:18,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 111 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-18 07:30:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1964. [2022-01-18 07:30:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.905756495160469) internal successors, (7667), 1963 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 7667 transitions. [2022-01-18 07:30:18,339 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 7667 transitions. Word has length 27 [2022-01-18 07:30:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:18,339 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 7667 transitions. [2022-01-18 07:30:18,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 7667 transitions. [2022-01-18 07:30:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:30:18,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:18,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:18,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:18,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:18,551 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1329540183, now seen corresponding path program 2 times [2022-01-18 07:30:18,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:18,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225662007] [2022-01-18 07:30:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:18,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 07:30:18,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225662007] [2022-01-18 07:30:18,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225662007] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:18,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279932417] [2022-01-18 07:30:18,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:30:18,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:18,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:18,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 07:30:18,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:30:18,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 07:30:18,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 07:30:18,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279932417] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:18,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 07:30:18,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 9 [2022-01-18 07:30:18,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613331674] [2022-01-18 07:30:18,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 07:30:18,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 07:30:18,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 07:30:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-18 07:30:18,789 INFO L87 Difference]: Start difference. First operand 1964 states and 7667 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:18,846 INFO L93 Difference]: Finished difference Result 3007 states and 11629 transitions. [2022-01-18 07:30:18,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 07:30:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:18,855 INFO L225 Difference]: With dead ends: 3007 [2022-01-18 07:30:18,855 INFO L226 Difference]: Without dead ends: 3007 [2022-01-18 07:30:18,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 07:30:18,856 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:18,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 64 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 07:30:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2022-01-18 07:30:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2137. [2022-01-18 07:30:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.9307116104868913) internal successors, (8396), 2136 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 8396 transitions. [2022-01-18 07:30:18,942 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 8396 transitions. Word has length 29 [2022-01-18 07:30:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:18,943 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 8396 transitions. [2022-01-18 07:30:18,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 8396 transitions. [2022-01-18 07:30:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:30:18,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:18,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:18,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:19,164 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,SelfDestructingSolverStorable12 [2022-01-18 07:30:19,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:19,165 INFO L85 PathProgramCache]: Analyzing trace with hash -695147281, now seen corresponding path program 1 times [2022-01-18 07:30:19,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:19,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033476576] [2022-01-18 07:30:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:19,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:19,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033476576] [2022-01-18 07:30:19,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033476576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:19,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140745596] [2022-01-18 07:30:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:19,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:19,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:19,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 07:30:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:30:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:19,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:19,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140745596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:19,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:19,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 07:30:19,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530119383] [2022-01-18 07:30:19,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:19,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 07:30:19,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 07:30:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 07:30:19,387 INFO L87 Difference]: Start difference. First operand 2137 states and 8396 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:19,463 INFO L93 Difference]: Finished difference Result 2794 states and 10644 transitions. [2022-01-18 07:30:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 07:30:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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 29 [2022-01-18 07:30:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:19,471 INFO L225 Difference]: With dead ends: 2794 [2022-01-18 07:30:19,471 INFO L226 Difference]: Without dead ends: 2640 [2022-01-18 07:30:19,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-18 07:30:19,472 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 95 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:19,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 162 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-01-18 07:30:19,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 1918. [2022-01-18 07:30:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.9431403234220137) internal successors, (7559), 1917 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:19,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 7559 transitions. [2022-01-18 07:30:19,511 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 7559 transitions. Word has length 29 [2022-01-18 07:30:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:19,511 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 7559 transitions. [2022-01-18 07:30:19,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:19,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 7559 transitions. [2022-01-18 07:30:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 07:30:19,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:19,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:19,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:19,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:19,732 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1929157723, now seen corresponding path program 2 times [2022-01-18 07:30:19,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13240271] [2022-01-18 07:30:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:19,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:19,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:19,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13240271] [2022-01-18 07:30:19,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13240271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:19,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138771358] [2022-01-18 07:30:19,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:30:19,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:19,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:19,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:19,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 07:30:19,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:30:19,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 07:30:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:19,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:19,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138771358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:19,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:19,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2022-01-18 07:30:19,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225911840] [2022-01-18 07:30:19,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:19,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 07:30:19,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 07:30:19,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 07:30:19,977 INFO L87 Difference]: Start difference. First operand 1918 states and 7559 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:20,083 INFO L93 Difference]: Finished difference Result 5257 states and 20273 transitions. [2022-01-18 07:30:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 07:30:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 07:30:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:20,097 INFO L225 Difference]: With dead ends: 5257 [2022-01-18 07:30:20,098 INFO L226 Difference]: Without dead ends: 4937 [2022-01-18 07:30:20,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 07:30:20,099 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 113 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:20,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 212 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2022-01-18 07:30:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 2629. [2022-01-18 07:30:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2629 states, 2628 states have (on average 3.980213089802131) internal successors, (10460), 2628 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2629 states to 2629 states and 10460 transitions. [2022-01-18 07:30:20,164 INFO L78 Accepts]: Start accepts. Automaton has 2629 states and 10460 transitions. Word has length 29 [2022-01-18 07:30:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:20,164 INFO L470 AbstractCegarLoop]: Abstraction has 2629 states and 10460 transitions. [2022-01-18 07:30:20,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2629 states and 10460 transitions. [2022-01-18 07:30:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:20,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:20,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:20,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:20,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:20,377 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -638022169, now seen corresponding path program 3 times [2022-01-18 07:30:20,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:20,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228206308] [2022-01-18 07:30:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:20,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:20,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228206308] [2022-01-18 07:30:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228206308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599123279] [2022-01-18 07:30:20,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:30:20,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:20,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:20,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:20,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 07:30:20,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:30:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:20,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:20,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599123279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:20,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:20,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-01-18 07:30:20,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794551650] [2022-01-18 07:30:20,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:20,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:30:20,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:30:20,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:30:20,617 INFO L87 Difference]: Start difference. First operand 2629 states and 10460 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:21,593 INFO L93 Difference]: Finished difference Result 13022 states and 49751 transitions. [2022-01-18 07:30:21,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 07:30:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 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 31 [2022-01-18 07:30:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:21,644 INFO L225 Difference]: With dead ends: 13022 [2022-01-18 07:30:21,644 INFO L226 Difference]: Without dead ends: 12499 [2022-01-18 07:30:21,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=705, Invalid=2717, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 07:30:21,646 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 675 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:21,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [675 Valid, 326 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:30:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2022-01-18 07:30:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 5776. [2022-01-18 07:30:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5776 states, 5775 states have (on average 4.045367965367966) internal successors, (23362), 5775 states have internal predecessors, (23362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:21,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5776 states to 5776 states and 23362 transitions. [2022-01-18 07:30:21,829 INFO L78 Accepts]: Start accepts. Automaton has 5776 states and 23362 transitions. Word has length 31 [2022-01-18 07:30:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:21,830 INFO L470 AbstractCegarLoop]: Abstraction has 5776 states and 23362 transitions. [2022-01-18 07:30:21,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5776 states and 23362 transitions. [2022-01-18 07:30:21,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:21,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:21,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:21,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:22,051 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,SelfDestructingSolverStorable15 [2022-01-18 07:30:22,052 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash -871799379, now seen corresponding path program 4 times [2022-01-18 07:30:22,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:22,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079668670] [2022-01-18 07:30:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:22,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:22,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079668670] [2022-01-18 07:30:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079668670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723512067] [2022-01-18 07:30:22,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:30:22,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:22,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:22,086 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:22,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 07:30:22,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:30:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:22,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:22,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723512067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:22,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:22,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 07:30:22,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550463124] [2022-01-18 07:30:22,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:22,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 07:30:22,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 07:30:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 07:30:22,274 INFO L87 Difference]: Start difference. First operand 5776 states and 23362 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:22,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:22,468 INFO L93 Difference]: Finished difference Result 13141 states and 52344 transitions. [2022-01-18 07:30:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 07:30:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 07:30:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:22,508 INFO L225 Difference]: With dead ends: 13141 [2022-01-18 07:30:22,509 INFO L226 Difference]: Without dead ends: 12241 [2022-01-18 07:30:22,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:30:22,509 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 229 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:22,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 162 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12241 states. [2022-01-18 07:30:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12241 to 8849. [2022-01-18 07:30:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8849 states, 8848 states have (on average 4.189421338155515) internal successors, (37068), 8848 states have internal predecessors, (37068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8849 states to 8849 states and 37068 transitions. [2022-01-18 07:30:22,733 INFO L78 Accepts]: Start accepts. Automaton has 8849 states and 37068 transitions. Word has length 31 [2022-01-18 07:30:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:22,733 INFO L470 AbstractCegarLoop]: Abstraction has 8849 states and 37068 transitions. [2022-01-18 07:30:22,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 8849 states and 37068 transitions. [2022-01-18 07:30:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:22,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:22,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:22,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:22,967 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,SelfDestructingSolverStorable16 [2022-01-18 07:30:22,967 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash 325420737, now seen corresponding path program 5 times [2022-01-18 07:30:22,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:22,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403937515] [2022-01-18 07:30:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:22,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:23,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403937515] [2022-01-18 07:30:23,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403937515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438223599] [2022-01-18 07:30:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:30:23,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:23,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:23,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 07:30:23,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:30:23,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:23,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:23,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:23,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:23,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438223599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:23,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:23,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-18 07:30:23,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921689602] [2022-01-18 07:30:23,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:23,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:30:23,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:30:23,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:30:23,206 INFO L87 Difference]: Start difference. First operand 8849 states and 37068 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:23,713 INFO L93 Difference]: Finished difference Result 24527 states and 98100 transitions. [2022-01-18 07:30:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 07:30:23,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 07:30:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:23,791 INFO L225 Difference]: With dead ends: 24527 [2022-01-18 07:30:23,791 INFO L226 Difference]: Without dead ends: 24223 [2022-01-18 07:30:23,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-01-18 07:30:23,792 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 483 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:23,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 191 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:30:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24223 states. [2022-01-18 07:30:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24223 to 12684. [2022-01-18 07:30:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12684 states, 12683 states have (on average 4.337932665773082) internal successors, (55018), 12683 states have internal predecessors, (55018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12684 states to 12684 states and 55018 transitions. [2022-01-18 07:30:24,392 INFO L78 Accepts]: Start accepts. Automaton has 12684 states and 55018 transitions. Word has length 31 [2022-01-18 07:30:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:24,393 INFO L470 AbstractCegarLoop]: Abstraction has 12684 states and 55018 transitions. [2022-01-18 07:30:24,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 12684 states and 55018 transitions. [2022-01-18 07:30:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:24,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:24,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:24,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:24,635 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,SelfDestructingSolverStorable17 [2022-01-18 07:30:24,635 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -132626495, now seen corresponding path program 6 times [2022-01-18 07:30:24,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601705858] [2022-01-18 07:30:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:24,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:24,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601705858] [2022-01-18 07:30:24,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601705858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642253460] [2022-01-18 07:30:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:30:24,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:24,715 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:24,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 07:30:24,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:30:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:30:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:24,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642253460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:24,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:24,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2022-01-18 07:30:24,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833752753] [2022-01-18 07:30:24,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:24,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:30:24,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:24,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:30:24,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:30:24,947 INFO L87 Difference]: Start difference. First operand 12684 states and 55018 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:26,208 INFO L93 Difference]: Finished difference Result 66695 states and 282227 transitions. [2022-01-18 07:30:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 07:30:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 07:30:26,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:26,550 INFO L225 Difference]: With dead ends: 66695 [2022-01-18 07:30:26,550 INFO L226 Difference]: Without dead ends: 65385 [2022-01-18 07:30:26,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 07:30:26,552 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 667 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:26,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 174 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:30:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65385 states. [2022-01-18 07:30:27,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65385 to 33143. [2022-01-18 07:30:27,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33143 states, 33142 states have (on average 4.745911532194798) internal successors, (157289), 33142 states have internal predecessors, (157289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33143 states to 33143 states and 157289 transitions. [2022-01-18 07:30:27,810 INFO L78 Accepts]: Start accepts. Automaton has 33143 states and 157289 transitions. Word has length 31 [2022-01-18 07:30:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:27,810 INFO L470 AbstractCegarLoop]: Abstraction has 33143 states and 157289 transitions. [2022-01-18 07:30:27,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 33143 states and 157289 transitions. [2022-01-18 07:30:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:28,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:28,115 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:28,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:28,323 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1854514437, now seen corresponding path program 7 times [2022-01-18 07:30:28,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:28,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411514055] [2022-01-18 07:30:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:28,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:28,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411514055] [2022-01-18 07:30:28,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411514055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:28,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395121680] [2022-01-18 07:30:28,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:30:28,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:28,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:28,390 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:28,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 07:30:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:30:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:28,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:28,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395121680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:28,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:28,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 07:30:28,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332744729] [2022-01-18 07:30:28,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:28,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:30:28,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:30:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:30:28,618 INFO L87 Difference]: Start difference. First operand 33143 states and 157289 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:29,424 INFO L93 Difference]: Finished difference Result 48619 states and 218179 transitions. [2022-01-18 07:30:29,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 07:30:29,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 31 [2022-01-18 07:30:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:29,732 INFO L225 Difference]: With dead ends: 48619 [2022-01-18 07:30:29,732 INFO L226 Difference]: Without dead ends: 48487 [2022-01-18 07:30:29,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-01-18 07:30:29,732 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 262 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:29,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 218 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:30:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48487 states. [2022-01-18 07:30:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48487 to 33850. [2022-01-18 07:30:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33850 states, 33849 states have (on average 4.7301249667641585) internal successors, (160110), 33849 states have internal predecessors, (160110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:30,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33850 states to 33850 states and 160110 transitions. [2022-01-18 07:30:30,888 INFO L78 Accepts]: Start accepts. Automaton has 33850 states and 160110 transitions. Word has length 31 [2022-01-18 07:30:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:30,888 INFO L470 AbstractCegarLoop]: Abstraction has 33850 states and 160110 transitions. [2022-01-18 07:30:30,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 33850 states and 160110 transitions. [2022-01-18 07:30:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:30,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:30,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:30,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:31,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:31,195 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash -670266441, now seen corresponding path program 8 times [2022-01-18 07:30:31,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301248148] [2022-01-18 07:30:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:31,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:31,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:31,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301248148] [2022-01-18 07:30:31,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301248148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:31,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510345611] [2022-01-18 07:30:31,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:30:31,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:31,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:31,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 07:30:31,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:30:31,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:31,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:31,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:31,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510345611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:31,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:31,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 14 [2022-01-18 07:30:31,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010477982] [2022-01-18 07:30:31,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:31,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 07:30:31,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 07:30:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:30:31,492 INFO L87 Difference]: Start difference. First operand 33850 states and 160110 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:33,747 INFO L93 Difference]: Finished difference Result 83302 states and 345101 transitions. [2022-01-18 07:30:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 07:30:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 31 [2022-01-18 07:30:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:34,106 INFO L225 Difference]: With dead ends: 83302 [2022-01-18 07:30:34,106 INFO L226 Difference]: Without dead ends: 81495 [2022-01-18 07:30:34,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 07:30:34,108 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 855 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:34,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 371 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 07:30:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81495 states. [2022-01-18 07:30:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81495 to 32872. [2022-01-18 07:30:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32872 states, 32871 states have (on average 4.6574183931124695) internal successors, (153094), 32871 states have internal predecessors, (153094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32872 states to 32872 states and 153094 transitions. [2022-01-18 07:30:35,840 INFO L78 Accepts]: Start accepts. Automaton has 32872 states and 153094 transitions. Word has length 31 [2022-01-18 07:30:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:35,840 INFO L470 AbstractCegarLoop]: Abstraction has 32872 states and 153094 transitions. [2022-01-18 07:30:35,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32872 states and 153094 transitions. [2022-01-18 07:30:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 07:30:35,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:35,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:35,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:36,120 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,SelfDestructingSolverStorable20 [2022-01-18 07:30:36,122 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash 135314879, now seen corresponding path program 9 times [2022-01-18 07:30:36,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619589576] [2022-01-18 07:30:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:36,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:36,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619589576] [2022-01-18 07:30:36,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619589576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21255739] [2022-01-18 07:30:36,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:30:36,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:36,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:36,155 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:36,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 07:30:36,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:30:36,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:36,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:36,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:36,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:36,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21255739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:36,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:36,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 07:30:36,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026594080] [2022-01-18 07:30:36,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:36,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:30:36,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:36,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:30:36,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:30:36,399 INFO L87 Difference]: Start difference. First operand 32872 states and 153094 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:37,553 INFO L93 Difference]: Finished difference Result 59892 states and 264687 transitions. [2022-01-18 07:30:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 07:30:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 07:30:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:37,811 INFO L225 Difference]: With dead ends: 59892 [2022-01-18 07:30:37,811 INFO L226 Difference]: Without dead ends: 59562 [2022-01-18 07:30:37,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=402, Invalid=1320, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 07:30:37,813 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 503 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:37,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 271 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:30:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59562 states. [2022-01-18 07:30:38,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59562 to 32800. [2022-01-18 07:30:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32800 states, 32799 states have (on average 4.647367297783469) internal successors, (152429), 32799 states have internal predecessors, (152429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32800 states to 32800 states and 152429 transitions. [2022-01-18 07:30:38,900 INFO L78 Accepts]: Start accepts. Automaton has 32800 states and 152429 transitions. Word has length 31 [2022-01-18 07:30:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:38,900 INFO L470 AbstractCegarLoop]: Abstraction has 32800 states and 152429 transitions. [2022-01-18 07:30:38,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 32800 states and 152429 transitions. [2022-01-18 07:30:38,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:30:38,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:38,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:38,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:39,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:39,185 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -917380623, now seen corresponding path program 10 times [2022-01-18 07:30:39,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:39,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439148788] [2022-01-18 07:30:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:39,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:39,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:39,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439148788] [2022-01-18 07:30:39,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439148788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511889989] [2022-01-18 07:30:39,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:30:39,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:39,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:39,237 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:39,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 07:30:39,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:30:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 07:30:39,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:39,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511889989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:39,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:39,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-18 07:30:39,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127736084] [2022-01-18 07:30:39,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:39,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:30:39,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:30:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:30:39,648 INFO L87 Difference]: Start difference. First operand 32800 states and 152429 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:40,163 INFO L93 Difference]: Finished difference Result 52086 states and 238055 transitions. [2022-01-18 07:30:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 07:30:40,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 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 33 [2022-01-18 07:30:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:40,402 INFO L225 Difference]: With dead ends: 52086 [2022-01-18 07:30:40,402 INFO L226 Difference]: Without dead ends: 51911 [2022-01-18 07:30:40,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-18 07:30:40,403 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:40,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 192 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:30:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51911 states. [2022-01-18 07:30:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51911 to 44066. [2022-01-18 07:30:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44066 states, 44065 states have (on average 4.725019857029388) internal successors, (208208), 44065 states have internal predecessors, (208208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44066 states to 44066 states and 208208 transitions. [2022-01-18 07:30:41,908 INFO L78 Accepts]: Start accepts. Automaton has 44066 states and 208208 transitions. Word has length 33 [2022-01-18 07:30:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:41,908 INFO L470 AbstractCegarLoop]: Abstraction has 44066 states and 208208 transitions. [2022-01-18 07:30:41,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 44066 states and 208208 transitions. [2022-01-18 07:30:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:30:42,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:42,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:42,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:42,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:42,228 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1712141219, now seen corresponding path program 11 times [2022-01-18 07:30:42,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:42,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385598148] [2022-01-18 07:30:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:42,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:42,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385598148] [2022-01-18 07:30:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385598148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:42,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128416679] [2022-01-18 07:30:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:30:42,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:42,281 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:42,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 07:30:42,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:30:42,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:30:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:42,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:30:42,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128416679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:42,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:42,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 07:30:42,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724851691] [2022-01-18 07:30:42,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:42,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:30:42,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:30:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:30:42,540 INFO L87 Difference]: Start difference. First operand 44066 states and 208208 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:44,468 INFO L93 Difference]: Finished difference Result 144748 states and 644596 transitions. [2022-01-18 07:30:44,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 07:30:44,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 07:30:44,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:45,539 INFO L225 Difference]: With dead ends: 144748 [2022-01-18 07:30:45,539 INFO L226 Difference]: Without dead ends: 143934 [2022-01-18 07:30:45,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 07:30:45,540 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 663 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:45,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 360 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:30:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143934 states. [2022-01-18 07:30:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143934 to 81343. [2022-01-18 07:30:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81343 states, 81342 states have (on average 4.821174792849942) internal successors, (392164), 81342 states have internal predecessors, (392164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81343 states to 81343 states and 392164 transitions. [2022-01-18 07:30:49,300 INFO L78 Accepts]: Start accepts. Automaton has 81343 states and 392164 transitions. Word has length 33 [2022-01-18 07:30:49,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:49,300 INFO L470 AbstractCegarLoop]: Abstraction has 81343 states and 392164 transitions. [2022-01-18 07:30:49,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 81343 states and 392164 transitions. [2022-01-18 07:30:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 07:30:49,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:49,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:49,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:49,724 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,SelfDestructingSolverStorable23 [2022-01-18 07:30:49,724 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:49,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:49,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1370285983, now seen corresponding path program 12 times [2022-01-18 07:30:49,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:49,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458308104] [2022-01-18 07:30:49,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:49,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:49,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:49,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458308104] [2022-01-18 07:30:49,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458308104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:49,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598889626] [2022-01-18 07:30:49,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:30:49,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:49,768 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:49,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 07:30:49,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:30:49,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:30:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:30:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:50,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:30:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598889626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:50,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:50,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-01-18 07:30:50,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44158589] [2022-01-18 07:30:50,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:50,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:30:50,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:30:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:30:50,366 INFO L87 Difference]: Start difference. First operand 81343 states and 392164 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:30:52,642 INFO L93 Difference]: Finished difference Result 162029 states and 737624 transitions. [2022-01-18 07:30:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 07:30:52,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 07:30:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:30:53,464 INFO L225 Difference]: With dead ends: 162029 [2022-01-18 07:30:53,464 INFO L226 Difference]: Without dead ends: 161582 [2022-01-18 07:30:53,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 07:30:53,465 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 444 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:30:53,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 338 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:30:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161582 states. [2022-01-18 07:30:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161582 to 110132. [2022-01-18 07:30:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110132 states, 110131 states have (on average 4.7964878190518565) internal successors, (528242), 110131 states have internal predecessors, (528242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110132 states to 110132 states and 528242 transitions. [2022-01-18 07:30:58,114 INFO L78 Accepts]: Start accepts. Automaton has 110132 states and 528242 transitions. Word has length 33 [2022-01-18 07:30:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:30:58,115 INFO L470 AbstractCegarLoop]: Abstraction has 110132 states and 528242 transitions. [2022-01-18 07:30:58,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:30:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 110132 states and 528242 transitions. [2022-01-18 07:30:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:30:58,430 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:30:58,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:30:58,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 07:30:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:58,631 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:30:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:30:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 707900697, now seen corresponding path program 13 times [2022-01-18 07:30:58,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:30:58,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926594599] [2022-01-18 07:30:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:30:58,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:30:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:30:58,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:30:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926594599] [2022-01-18 07:30:58,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926594599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:30:58,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883095602] [2022-01-18 07:30:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:30:58,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:30:58,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:30:58,681 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:30:58,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 07:30:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:30:58,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:30:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:30:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:58,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:30:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:30:58,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883095602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:30:58,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:30:58,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-18 07:30:58,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271530827] [2022-01-18 07:30:58,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:30:58,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 07:30:58,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:30:58,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 07:30:58,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-18 07:30:58,817 INFO L87 Difference]: Start difference. First operand 110132 states and 528242 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:31:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:31:01,639 INFO L93 Difference]: Finished difference Result 232640 states and 1102907 transitions. [2022-01-18 07:31:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 07:31:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 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 35 [2022-01-18 07:31:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:31:03,462 INFO L225 Difference]: With dead ends: 232640 [2022-01-18 07:31:03,462 INFO L226 Difference]: Without dead ends: 231487 [2022-01-18 07:31:03,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:31:03,463 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 317 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:31:03,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 209 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 07:31:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231487 states. [2022-01-18 07:31:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231487 to 217570. [2022-01-18 07:31:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217570 states, 217569 states have (on average 4.7864263750810085) internal successors, (1041378), 217569 states have internal predecessors, (1041378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:31:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217570 states to 217570 states and 1041378 transitions. [2022-01-18 07:31:12,249 INFO L78 Accepts]: Start accepts. Automaton has 217570 states and 1041378 transitions. Word has length 35 [2022-01-18 07:31:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:31:12,249 INFO L470 AbstractCegarLoop]: Abstraction has 217570 states and 1041378 transitions. [2022-01-18 07:31:12,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:31:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 217570 states and 1041378 transitions. [2022-01-18 07:31:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:31:12,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:31:12,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:31:12,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 07:31:13,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:31:13,171 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:31:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:31:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1721346381, now seen corresponding path program 14 times [2022-01-18 07:31:13,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:31:13,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967449382] [2022-01-18 07:31:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:31:13,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:31:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:31:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 07:31:13,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:31:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967449382] [2022-01-18 07:31:13,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967449382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:31:13,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166067971] [2022-01-18 07:31:13,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:31:13,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:31:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:31:13,227 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:31:13,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 07:31:13,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:31:13,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:31:13,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:31:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:31:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 07:31:13,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:31:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:31:13,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166067971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:31:13,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:31:13,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 13 [2022-01-18 07:31:13,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539250633] [2022-01-18 07:31:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:31:13,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:31:13,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:31:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:31:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:31:13,466 INFO L87 Difference]: Start difference. First operand 217570 states and 1041378 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:31:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:31:22,407 INFO L93 Difference]: Finished difference Result 665622 states and 3017455 transitions. [2022-01-18 07:31:22,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 07:31:22,407 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:31:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:31:27,563 INFO L225 Difference]: With dead ends: 665622 [2022-01-18 07:31:27,564 INFO L226 Difference]: Without dead ends: 663051 [2022-01-18 07:31:27,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1495, Invalid=5815, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 07:31:27,565 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1085 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:31:27,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 392 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:31:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663051 states. [2022-01-18 07:31:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663051 to 429202. [2022-01-18 07:31:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429202 states, 429201 states have (on average 4.839436534397636) internal successors, (2077091), 429201 states have internal predecessors, (2077091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:31:54,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429202 states to 429202 states and 2077091 transitions. [2022-01-18 07:31:54,223 INFO L78 Accepts]: Start accepts. Automaton has 429202 states and 2077091 transitions. Word has length 35 [2022-01-18 07:31:54,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:31:54,224 INFO L470 AbstractCegarLoop]: Abstraction has 429202 states and 2077091 transitions. [2022-01-18 07:31:54,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:31:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 429202 states and 2077091 transitions. [2022-01-18 07:31:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:31:57,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:31:57,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:31:57,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 07:31:57,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:31:57,586 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:31:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:31:57,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1329498949, now seen corresponding path program 15 times [2022-01-18 07:31:57,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:31:57,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898861372] [2022-01-18 07:31:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:31:57,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:31:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:31:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:31:57,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:31:57,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898861372] [2022-01-18 07:31:57,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898861372] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:31:57,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531325995] [2022-01-18 07:31:57,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:31:57,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:31:57,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:31:57,667 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:31:57,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 07:31:57,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:31:57,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:31:57,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:31:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:31:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 07:31:57,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:31:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:31:57,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531325995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:31:57,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:31:57,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 13 [2022-01-18 07:31:57,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405056525] [2022-01-18 07:31:57,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:31:57,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 07:31:57,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:31:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 07:31:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-01-18 07:31:57,944 INFO L87 Difference]: Start difference. First operand 429202 states and 2077091 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:32:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:32:03,846 INFO L93 Difference]: Finished difference Result 455471 states and 2171017 transitions. [2022-01-18 07:32:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 07:32:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:32:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:32:07,472 INFO L225 Difference]: With dead ends: 455471 [2022-01-18 07:32:07,473 INFO L226 Difference]: Without dead ends: 454320 [2022-01-18 07:32:07,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2022-01-18 07:32:07,473 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:32:07,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 162 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:32:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454320 states. [2022-01-18 07:32:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454320 to 401530. [2022-01-18 07:32:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401530 states, 401529 states have (on average 4.856503515312717) internal successors, (1950027), 401529 states have internal predecessors, (1950027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:32:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401530 states to 401530 states and 1950027 transitions. [2022-01-18 07:32:24,453 INFO L78 Accepts]: Start accepts. Automaton has 401530 states and 1950027 transitions. Word has length 35 [2022-01-18 07:32:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:32:24,453 INFO L470 AbstractCegarLoop]: Abstraction has 401530 states and 1950027 transitions. [2022-01-18 07:32:24,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:32:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 401530 states and 1950027 transitions. [2022-01-18 07:32:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:32:26,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:32:26,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:32:26,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 07:32:26,956 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,SelfDestructingSolverStorable27 [2022-01-18 07:32:26,957 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:32:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:32:26,957 INFO L85 PathProgramCache]: Analyzing trace with hash -923485257, now seen corresponding path program 16 times [2022-01-18 07:32:26,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:32:26,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118928611] [2022-01-18 07:32:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:32:26,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:32:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:32:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:32:27,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:32:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118928611] [2022-01-18 07:32:27,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118928611] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:32:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847283397] [2022-01-18 07:32:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:32:27,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:32:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:32:27,030 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:32:27,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 07:32:27,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:32:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:32:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:32:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:32:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 07:32:27,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:32:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:32:27,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847283397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:32:27,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:32:27,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 12 [2022-01-18 07:32:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017048566] [2022-01-18 07:32:27,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:32:27,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 07:32:27,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:32:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 07:32:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-01-18 07:32:27,280 INFO L87 Difference]: Start difference. First operand 401530 states and 1950027 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:32:36,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:32:36,790 INFO L93 Difference]: Finished difference Result 587552 states and 2801184 transitions. [2022-01-18 07:32:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 07:32:36,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 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 35 [2022-01-18 07:32:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:32:44,509 INFO L225 Difference]: With dead ends: 587552 [2022-01-18 07:32:44,509 INFO L226 Difference]: Without dead ends: 583480 [2022-01-18 07:32:44,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:32:44,510 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 339 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:32:44,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 143 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 07:32:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583480 states. [2022-01-18 07:33:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583480 to 503491. [2022-01-18 07:33:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503491 states, 503490 states have (on average 4.88280402788536) internal successors, (2458443), 503490 states have internal predecessors, (2458443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:33:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503491 states to 503491 states and 2458443 transitions. [2022-01-18 07:33:12,404 INFO L78 Accepts]: Start accepts. Automaton has 503491 states and 2458443 transitions. Word has length 35 [2022-01-18 07:33:12,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:33:12,404 INFO L470 AbstractCegarLoop]: Abstraction has 503491 states and 2458443 transitions. [2022-01-18 07:33:12,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:33:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 503491 states and 2458443 transitions. [2022-01-18 07:33:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:33:15,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:33:15,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:33:15,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-18 07:33:15,883 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,SelfDestructingSolverStorable28 [2022-01-18 07:33:15,883 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:33:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:33:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2027409861, now seen corresponding path program 17 times [2022-01-18 07:33:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:33:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860094142] [2022-01-18 07:33:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:33:15,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:33:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:33:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:33:15,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:33:15,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860094142] [2022-01-18 07:33:15,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860094142] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:33:15,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932841893] [2022-01-18 07:33:15,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:33:15,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:33:15,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:33:15,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:33:15,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 07:33:15,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:33:15,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:33:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:33:15,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:33:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 07:33:16,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:33:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:33:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932841893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:33:16,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:33:16,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2022-01-18 07:33:16,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459632578] [2022-01-18 07:33:16,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:33:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 07:33:16,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:33:16,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 07:33:16,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 07:33:16,170 INFO L87 Difference]: Start difference. First operand 503491 states and 2458443 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:33:27,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:33:27,699 INFO L93 Difference]: Finished difference Result 882190 states and 4102264 transitions. [2022-01-18 07:33:27,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 07:33:27,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:33:27,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:33:40,437 INFO L225 Difference]: With dead ends: 882190 [2022-01-18 07:33:40,437 INFO L226 Difference]: Without dead ends: 865498 [2022-01-18 07:33:40,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=504, Invalid=1388, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 07:33:40,451 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 651 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:33:40,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 292 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:33:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865498 states. [2022-01-18 07:34:10,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865498 to 652930. [2022-01-18 07:34:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652930 states, 652929 states have (on average 4.884675056552856) internal successors, (3189346), 652929 states have internal predecessors, (3189346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:34:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652930 states to 652930 states and 3189346 transitions. [2022-01-18 07:34:17,951 INFO L78 Accepts]: Start accepts. Automaton has 652930 states and 3189346 transitions. Word has length 35 [2022-01-18 07:34:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:34:17,951 INFO L470 AbstractCegarLoop]: Abstraction has 652930 states and 3189346 transitions. [2022-01-18 07:34:17,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:34:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 652930 states and 3189346 transitions. [2022-01-18 07:34:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:34:21,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:34:21,968 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:34:21,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 07:34:22,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:34:22,185 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:34:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:34:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1179768517, now seen corresponding path program 18 times [2022-01-18 07:34:22,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:34:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696917498] [2022-01-18 07:34:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:34:22,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:34:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:34:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:34:22,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:34:22,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696917498] [2022-01-18 07:34:22,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696917498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:34:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247542899] [2022-01-18 07:34:22,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:34:22,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:34:22,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:34:22,247 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:34:22,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 07:34:22,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 07:34:22,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:34:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 07:34:22,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:34:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 07:34:23,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:34:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 07:34:23,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247542899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:34:23,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:34:23,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2022-01-18 07:34:23,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291802629] [2022-01-18 07:34:23,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:34:23,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 07:34:23,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:34:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 07:34:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-18 07:34:23,234 INFO L87 Difference]: Start difference. First operand 652930 states and 3189346 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:34:35,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:34:35,500 INFO L93 Difference]: Finished difference Result 850757 states and 4076963 transitions. [2022-01-18 07:34:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 07:34:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-18 07:34:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:34:43,071 INFO L225 Difference]: With dead ends: 850757 [2022-01-18 07:34:43,071 INFO L226 Difference]: Without dead ends: 850426 [2022-01-18 07:34:43,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=667, Invalid=2195, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 07:34:43,072 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 737 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:34:43,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 332 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 07:34:44,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850426 states. [2022-01-18 07:35:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850426 to 662345. [2022-01-18 07:35:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662345 states, 662344 states have (on average 4.8847456910608384) internal successors, (3235382), 662344 states have internal predecessors, (3235382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:35:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662345 states to 662345 states and 3235382 transitions. [2022-01-18 07:35:19,491 INFO L78 Accepts]: Start accepts. Automaton has 662345 states and 3235382 transitions. Word has length 35 [2022-01-18 07:35:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:35:19,491 INFO L470 AbstractCegarLoop]: Abstraction has 662345 states and 3235382 transitions. [2022-01-18 07:35:19,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:35:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 662345 states and 3235382 transitions. [2022-01-18 07:35:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 07:35:23,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:35:23,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:35:23,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 07:35:23,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:35:23,872 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-18 07:35:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:35:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1215150113, now seen corresponding path program 19 times [2022-01-18 07:35:23,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:35:23,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134880442] [2022-01-18 07:35:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:35:23,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:35:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:35:23,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:35:23,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:35:23,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134880442] [2022-01-18 07:35:23,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134880442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:35:23,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122862802] [2022-01-18 07:35:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:35:23,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:35:23,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:35:23,916 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 07:35:23,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 07:35:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:35:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 07:35:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:35:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:35:24,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:35:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 07:35:24,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122862802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:35:24,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:35:24,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-01-18 07:35:24,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126691402] [2022-01-18 07:35:24,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:35:24,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 07:35:24,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:35:24,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 07:35:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-18 07:35:24,109 INFO L87 Difference]: Start difference. First operand 662345 states and 3235382 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 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)