/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:31:16,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:31:16,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:31:16,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 17:31:16,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:31:16,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:31:16,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:31:16,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 17:31:16,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:31:16,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:31:16,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:31:16,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:31:16,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:31:16,153 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:31:16,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:31:16,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:31:16,154 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:31:16,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:31:16,154 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:31:16,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:31:16,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:31:16,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:31:16,155 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:31:16,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:31:16,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:31:16,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:31:16,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:31:16,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:31:16,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:31:16,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:31:16,157 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:31:16,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:31:16,157 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:31:16,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:31:16,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:31:16,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:31:16,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:31:16,356 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:31:16,357 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:31:16,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2022-01-18 17:31:16,358 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2022-01-18 17:31:16,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:31:16,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:31:16,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:31:16,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:31:16,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:31:16,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,398 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:31:16,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:31:16,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:31:16,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:31:16,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:31:16,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:31:16,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:31:16,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:31:16,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:31:16,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/1) ... [2022-01-18 17:31:16,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:31:16,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:16,440 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 17:31:16,444 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 17:31:16,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:31:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:31:16,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:31:16,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:31:16,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:31:16,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:31:16,469 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:31:16,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:31:16,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:31:16,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 17:31:16,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 17:31:16,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 17:31:16,470 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 17:31:16,503 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:31:16,505 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:31:16,607 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:31:16,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:31:16,623 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:31:16,629 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:31:16 BoogieIcfgContainer [2022-01-18 17:31:16,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:31:16,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:31:16,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:31:16,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:31:16,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:16" (1/2) ... [2022-01-18 17:31:16,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28863df3 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:31:16, skipping insertion in model container [2022-01-18 17:31:16,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:31:16" (2/2) ... [2022-01-18 17:31:16,641 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2022-01-18 17:31:16,644 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:31:16,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:31:16,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:31:16,645 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:31:16,682 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 17:31:16,752 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:31:16,757 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 17:31:16,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 17:31:16,780 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2022-01-18 17:31:16,818 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 17:31:16,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:16,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:16,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash 599746223, now seen corresponding path program 1 times [2022-01-18 17:31:16,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:16,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824138729] [2022-01-18 17:31:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:16,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:16,974 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 17:31:16,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:16,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824138729] [2022-01-18 17:31:16,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824138729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:31:16,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:31:16,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:31:16,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023090499] [2022-01-18 17:31:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:31:16,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:31:16,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:17,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:31:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:31:17,004 INFO L87 Difference]: Start difference. First operand has 114 states, 113 states have (on average 2.7787610619469025) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:17,096 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2022-01-18 17:31:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 17:31:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 17:31:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:17,105 INFO L225 Difference]: With dead ends: 156 [2022-01-18 17:31:17,105 INFO L226 Difference]: Without dead ends: 156 [2022-01-18 17:31:17,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 17:31:17,108 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:17,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:31:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-18 17:31:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2022-01-18 17:31:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2022-01-18 17:31:17,166 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2022-01-18 17:31:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:17,167 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2022-01-18 17:31:17,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2022-01-18 17:31:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 17:31:17,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:17,169 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] [2022-01-18 17:31:17,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:31:17,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash -530635729, now seen corresponding path program 1 times [2022-01-18 17:31:17,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:17,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827953040] [2022-01-18 17:31:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:17,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:17,201 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 17:31:17,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:17,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827953040] [2022-01-18 17:31:17,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827953040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:31:17,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:31:17,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:31:17,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596323405] [2022-01-18 17:31:17,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:31:17,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 17:31:17,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 17:31:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 17:31:17,204 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:17,258 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2022-01-18 17:31:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:31:17,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 17:31:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:17,260 INFO L225 Difference]: With dead ends: 160 [2022-01-18 17:31:17,260 INFO L226 Difference]: Without dead ends: 160 [2022-01-18 17:31:17,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:31:17,261 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:17,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 16 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:31:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-18 17:31:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-18 17:31:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2022-01-18 17:31:17,280 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2022-01-18 17:31:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:17,280 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2022-01-18 17:31:17,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2022-01-18 17:31:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:31:17,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:17,282 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] [2022-01-18 17:31:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 17:31:17,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash 247610633, now seen corresponding path program 1 times [2022-01-18 17:31:17,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:17,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134228359] [2022-01-18 17:31:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:17,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:17,578 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 17:31:17,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:17,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134228359] [2022-01-18 17:31:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134228359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273551174] [2022-01-18 17:31:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:17,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:17,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:17,588 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 17:31:17,591 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 17:31:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:17,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 17:31:17,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:17,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:18,010 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:18,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273551174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:18,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2022-01-18 17:31:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700167422] [2022-01-18 17:31:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:18,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:31:18,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:31:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:31:18,272 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 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 17:31:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:18,860 INFO L93 Difference]: Finished difference Result 480 states and 1349 transitions. [2022-01-18 17:31:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:31:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 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 24 [2022-01-18 17:31:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:18,863 INFO L225 Difference]: With dead ends: 480 [2022-01-18 17:31:18,863 INFO L226 Difference]: Without dead ends: 312 [2022-01-18 17:31:18,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:31:18,864 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 335 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:18,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 121 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-18 17:31:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 194. [2022-01-18 17:31:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2022-01-18 17:31:18,877 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2022-01-18 17:31:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:18,878 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2022-01-18 17:31:18,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 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 17:31:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2022-01-18 17:31:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:31:18,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:18,879 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] [2022-01-18 17:31:18,898 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 17:31:19,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:19,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1205438725, now seen corresponding path program 2 times [2022-01-18 17:31:19,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:19,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756382479] [2022-01-18 17:31:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:19,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:19,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:19,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756382479] [2022-01-18 17:31:19,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756382479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205768640] [2022-01-18 17:31:19,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:19,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:19,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:19,263 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 17:31:19,264 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 17:31:19,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:19,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 17:31:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:19,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:19,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:19,641 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:19,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:19,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205768640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:19,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:19,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 17:31:19,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954456812] [2022-01-18 17:31:19,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:19,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:31:19,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:19,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:31:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:31:19,818 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:20,747 INFO L93 Difference]: Finished difference Result 598 states and 1797 transitions. [2022-01-18 17:31:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:31:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:31:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:20,751 INFO L225 Difference]: With dead ends: 598 [2022-01-18 17:31:20,751 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 17:31:20,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:31:20,752 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 307 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:20,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 219 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 477 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-01-18 17:31:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 17:31:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 287. [2022-01-18 17:31:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.944055944055944) internal successors, (842), 286 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 842 transitions. [2022-01-18 17:31:20,765 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 842 transitions. Word has length 24 [2022-01-18 17:31:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:20,765 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 842 transitions. [2022-01-18 17:31:20,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 842 transitions. [2022-01-18 17:31:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:31:20,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:20,767 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] [2022-01-18 17:31:20,795 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 17:31:20,983 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,SelfDestructingSolverStorable3 [2022-01-18 17:31:20,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:20,984 INFO L85 PathProgramCache]: Analyzing trace with hash -695052013, now seen corresponding path program 3 times [2022-01-18 17:31:20,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:20,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345793190] [2022-01-18 17:31:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:20,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:21,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345793190] [2022-01-18 17:31:21,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345793190] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271586193] [2022-01-18 17:31:21,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:21,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:21,156 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 17:31:21,156 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 17:31:21,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:31:21,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:21,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 17:31:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:21,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:21,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:21,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:21,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271586193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:21,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:21,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 17:31:21,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899427738] [2022-01-18 17:31:21,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:21,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:31:21,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:21,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:31:21,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:31:21,690 INFO L87 Difference]: Start difference. First operand 287 states and 842 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:23,377 INFO L93 Difference]: Finished difference Result 935 states and 2785 transitions. [2022-01-18 17:31:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:31:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:31:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:23,381 INFO L225 Difference]: With dead ends: 935 [2022-01-18 17:31:23,381 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 17:31:23,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=817, Invalid=3875, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:31:23,383 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 429 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:23,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 299 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 606 Invalid, 0 Unknown, 453 Unchecked, 0.4s Time] [2022-01-18 17:31:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 17:31:23,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 321. [2022-01-18 17:31:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 3.003125) internal successors, (961), 320 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 961 transitions. [2022-01-18 17:31:23,394 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 961 transitions. Word has length 24 [2022-01-18 17:31:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:23,394 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 961 transitions. [2022-01-18 17:31:23,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 961 transitions. [2022-01-18 17:31:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:31:23,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:23,395 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] [2022-01-18 17:31:23,413 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 17:31:23,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:23,613 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1991715119, now seen corresponding path program 4 times [2022-01-18 17:31:23,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058005848] [2022-01-18 17:31:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:23,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:23,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:23,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058005848] [2022-01-18 17:31:23,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058005848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:23,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867283670] [2022-01-18 17:31:23,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:31:23,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:23,773 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 17:31:23,774 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 17:31:23,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:31:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:23,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:31:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:23,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:23,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:23,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:24,024 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:24,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:24,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867283670] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:24,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:24,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 17:31:24,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544350496] [2022-01-18 17:31:24,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:24,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:31:24,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:31:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:31:24,205 INFO L87 Difference]: Start difference. First operand 321 states and 961 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:24,729 INFO L93 Difference]: Finished difference Result 517 states and 1513 transitions. [2022-01-18 17:31:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:31:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:31:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:24,732 INFO L225 Difference]: With dead ends: 517 [2022-01-18 17:31:24,732 INFO L226 Difference]: Without dead ends: 486 [2022-01-18 17:31:24,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:31:24,733 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 156 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:24,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 228 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-18 17:31:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 325. [2022-01-18 17:31:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.996913580246914) internal successors, (971), 324 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 971 transitions. [2022-01-18 17:31:24,741 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 971 transitions. Word has length 24 [2022-01-18 17:31:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:24,742 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 971 transitions. [2022-01-18 17:31:24,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 971 transitions. [2022-01-18 17:31:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:31:24,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:24,744 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] [2022-01-18 17:31:24,765 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 17:31:24,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:24,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1504212173, now seen corresponding path program 5 times [2022-01-18 17:31:24,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:24,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885291057] [2022-01-18 17:31:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:24,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:25,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885291057] [2022-01-18 17:31:25,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885291057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269790598] [2022-01-18 17:31:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:25,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:25,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:25,099 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 17:31:25,100 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 17:31:25,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:31:25,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:25,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:31:25,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:25,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:25,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:25,406 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:25,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:25,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269790598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:25,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:25,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 17:31:25,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797173428] [2022-01-18 17:31:25,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:25,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:31:25,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:25,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:31:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:31:25,579 INFO L87 Difference]: Start difference. First operand 325 states and 971 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:26,236 INFO L93 Difference]: Finished difference Result 556 states and 1609 transitions. [2022-01-18 17:31:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:31:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:31:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:26,238 INFO L225 Difference]: With dead ends: 556 [2022-01-18 17:31:26,238 INFO L226 Difference]: Without dead ends: 510 [2022-01-18 17:31:26,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:31:26,239 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 148 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:26,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 265 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 718 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-01-18 17:31:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-18 17:31:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 327. [2022-01-18 17:31:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9938650306748467) internal successors, (976), 326 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 976 transitions. [2022-01-18 17:31:26,248 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 976 transitions. Word has length 24 [2022-01-18 17:31:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 976 transitions. [2022-01-18 17:31:26,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 976 transitions. [2022-01-18 17:31:26,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 17:31:26,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:26,251 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] [2022-01-18 17:31:26,273 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 17:31:26,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:26,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash 206371921, now seen corresponding path program 6 times [2022-01-18 17:31:26,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735711226] [2022-01-18 17:31:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:26,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:26,543 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 17:31:26,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735711226] [2022-01-18 17:31:26,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735711226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533343177] [2022-01-18 17:31:26,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:31:26,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:26,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:26,544 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 17:31:26,545 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 17:31:26,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:31:26,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:26,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 17:31:26,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:26,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:26,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:26,875 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:26,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:27,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533343177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:27,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:27,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2022-01-18 17:31:27,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47668700] [2022-01-18 17:31:27,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:27,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:31:27,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:31:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:31:27,024 INFO L87 Difference]: Start difference. First operand 327 states and 976 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 17:31:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:28,338 INFO L93 Difference]: Finished difference Result 827 states and 2341 transitions. [2022-01-18 17:31:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:31:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 17:31:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:28,342 INFO L225 Difference]: With dead ends: 827 [2022-01-18 17:31:28,342 INFO L226 Difference]: Without dead ends: 785 [2022-01-18 17:31:28,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:31:28,343 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:28,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 313 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 737 Invalid, 0 Unknown, 313 Unchecked, 0.4s Time] [2022-01-18 17:31:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-18 17:31:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 353. [2022-01-18 17:31:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.022727272727273) internal successors, (1064), 352 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1064 transitions. [2022-01-18 17:31:28,353 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1064 transitions. Word has length 24 [2022-01-18 17:31:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:28,353 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 1064 transitions. [2022-01-18 17:31:28,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 17:31:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1064 transitions. [2022-01-18 17:31:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:28,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:28,354 INFO 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] [2022-01-18 17:31:28,372 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 17:31:28,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:28,570 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:28,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1282993899, now seen corresponding path program 7 times [2022-01-18 17:31:28,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:28,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256803849] [2022-01-18 17:31:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:28,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:28,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256803849] [2022-01-18 17:31:28,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256803849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129890089] [2022-01-18 17:31:28,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:31:28,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:28,617 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 17:31:28,618 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 17:31:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:28,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:28,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129890089] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:28,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:28,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:31:28,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528630287] [2022-01-18 17:31:28,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:28,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:31:28,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:31:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:31:28,840 INFO L87 Difference]: Start difference. First operand 353 states and 1064 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:30,543 INFO L93 Difference]: Finished difference Result 2020 states and 5811 transitions. [2022-01-18 17:31:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 17:31:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:30,550 INFO L225 Difference]: With dead ends: 2020 [2022-01-18 17:31:30,550 INFO L226 Difference]: Without dead ends: 2020 [2022-01-18 17:31:30,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:31:30,553 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 434 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:30,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 389 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:31:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2022-01-18 17:31:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 426. [2022-01-18 17:31:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.2188235294117646) internal successors, (1368), 425 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1368 transitions. [2022-01-18 17:31:30,571 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1368 transitions. Word has length 26 [2022-01-18 17:31:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:30,572 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1368 transitions. [2022-01-18 17:31:30,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1368 transitions. [2022-01-18 17:31:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:30,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:30,573 INFO 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] [2022-01-18 17:31:30,590 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 17:31:30,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:30,788 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1524378449, now seen corresponding path program 8 times [2022-01-18 17:31:30,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:30,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137887486] [2022-01-18 17:31:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:30,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:30,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137887486] [2022-01-18 17:31:30,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137887486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:30,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548596827] [2022-01-18 17:31:30,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:30,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:30,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:30,829 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 17:31:30,829 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 17:31:30,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:30,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:30,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:30,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:30,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548596827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:30,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:30,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:31:30,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802788170] [2022-01-18 17:31:30,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:30,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:31:30,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:30,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:31:30,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:31:30,994 INFO L87 Difference]: Start difference. First operand 426 states and 1368 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:31,663 INFO L93 Difference]: Finished difference Result 1467 states and 4213 transitions. [2022-01-18 17:31:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:31:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:31,668 INFO L225 Difference]: With dead ends: 1467 [2022-01-18 17:31:31,668 INFO L226 Difference]: Without dead ends: 1467 [2022-01-18 17:31:31,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 17:31:31,669 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 344 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:31,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 186 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:31,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-01-18 17:31:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 438. [2022-01-18 17:31:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.2128146453089244) internal successors, (1404), 437 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1404 transitions. [2022-01-18 17:31:31,682 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1404 transitions. Word has length 26 [2022-01-18 17:31:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:31,682 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1404 transitions. [2022-01-18 17:31:31,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1404 transitions. [2022-01-18 17:31:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:31,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:31,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:31,703 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 17:31:31,901 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,SelfDestructingSolverStorable9 [2022-01-18 17:31:31,901 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:31,902 INFO L85 PathProgramCache]: Analyzing trace with hash 673708591, now seen corresponding path program 9 times [2022-01-18 17:31:31,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:31,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501598403] [2022-01-18 17:31:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:31,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:31,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501598403] [2022-01-18 17:31:31,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501598403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271535943] [2022-01-18 17:31:31,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:31,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:31,947 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 17:31:31,948 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 17:31:31,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:31:31,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:31:31,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:32,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:32,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:32,345 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:32,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-01-18 17:31:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:32,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271535943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:32,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:32,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 27 [2022-01-18 17:31:32,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332793815] [2022-01-18 17:31:32,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:32,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:31:32,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:32,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:31:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:31:32,552 INFO L87 Difference]: Start difference. First operand 438 states and 1404 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:33,923 INFO L93 Difference]: Finished difference Result 1576 states and 4704 transitions. [2022-01-18 17:31:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:31:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:33,930 INFO L225 Difference]: With dead ends: 1576 [2022-01-18 17:31:33,930 INFO L226 Difference]: Without dead ends: 1576 [2022-01-18 17:31:33,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1436, Invalid=5704, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:31:33,932 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 550 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 513 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:33,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 418 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 871 Invalid, 0 Unknown, 513 Unchecked, 0.4s Time] [2022-01-18 17:31:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-01-18 17:31:33,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 431. [2022-01-18 17:31:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.2093023255813953) internal successors, (1380), 430 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1380 transitions. [2022-01-18 17:31:33,946 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1380 transitions. Word has length 26 [2022-01-18 17:31:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:33,946 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1380 transitions. [2022-01-18 17:31:33,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1380 transitions. [2022-01-18 17:31:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:33,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:33,947 INFO 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] [2022-01-18 17:31:33,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-18 17:31:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:34,163 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash -48760871, now seen corresponding path program 10 times [2022-01-18 17:31:34,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:34,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325964928] [2022-01-18 17:31:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:34,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:34,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325964928] [2022-01-18 17:31:34,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325964928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720628161] [2022-01-18 17:31:34,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:31:34,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:34,206 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 17:31:34,207 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 17:31:34,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:31:34,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:34,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:34,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:34,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720628161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:34,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:34,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:31:34,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419825689] [2022-01-18 17:31:34,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:34,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:31:34,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:31:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:31:34,378 INFO L87 Difference]: Start difference. First operand 431 states and 1380 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:34,819 INFO L93 Difference]: Finished difference Result 1470 states and 4175 transitions. [2022-01-18 17:31:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:31:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:34,824 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 17:31:34,824 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 17:31:34,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:31:34,825 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 276 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:34,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 174 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 17:31:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 443. [2022-01-18 17:31:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2036199095022626) internal successors, (1416), 442 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:34,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1416 transitions. [2022-01-18 17:31:34,837 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1416 transitions. Word has length 26 [2022-01-18 17:31:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:34,837 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1416 transitions. [2022-01-18 17:31:34,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:34,837 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1416 transitions. [2022-01-18 17:31:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:34,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:34,838 INFO 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] [2022-01-18 17:31:34,865 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 17:31:35,047 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,SelfDestructingSolverStorable11 [2022-01-18 17:31:35,047 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash 483145443, now seen corresponding path program 11 times [2022-01-18 17:31:35,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:35,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166689537] [2022-01-18 17:31:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:35,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:35,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:35,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166689537] [2022-01-18 17:31:35,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166689537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:35,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673696473] [2022-01-18 17:31:35,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:35,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:35,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:35,082 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 17:31:35,083 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 17:31:35,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:31:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:35,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:35,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673696473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:35,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:35,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:31:35,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895296598] [2022-01-18 17:31:35,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:35,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:31:35,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:31:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:31:35,244 INFO L87 Difference]: Start difference. First operand 443 states and 1416 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:35,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:35,716 INFO L93 Difference]: Finished difference Result 1271 states and 3742 transitions. [2022-01-18 17:31:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:31:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:35,721 INFO L225 Difference]: With dead ends: 1271 [2022-01-18 17:31:35,721 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 17:31:35,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:31:35,722 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 283 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:35,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 164 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 17:31:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 491. [2022-01-18 17:31:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.1714285714285713) internal successors, (1554), 490 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1554 transitions. [2022-01-18 17:31:35,733 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1554 transitions. Word has length 26 [2022-01-18 17:31:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:35,733 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1554 transitions. [2022-01-18 17:31:35,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1554 transitions. [2022-01-18 17:31:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:35,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:35,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:35,752 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 17:31:35,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-18 17:31:35,952 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:35,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1461702887, now seen corresponding path program 12 times [2022-01-18 17:31:35,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:35,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254930934] [2022-01-18 17:31:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:35,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:35,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254930934] [2022-01-18 17:31:35,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254930934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698116669] [2022-01-18 17:31:35,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:31:35,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:35,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:35,995 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 17:31:35,998 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 17:31:36,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:31:36,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:36,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:36,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:36,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:36,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698116669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:36,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:36,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:31:36,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498077045] [2022-01-18 17:31:36,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:36,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:31:36,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:31:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:31:36,176 INFO L87 Difference]: Start difference. First operand 491 states and 1554 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:36,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:36,695 INFO L93 Difference]: Finished difference Result 1396 states and 4042 transitions. [2022-01-18 17:31:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:31:36,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:36,699 INFO L225 Difference]: With dead ends: 1396 [2022-01-18 17:31:36,699 INFO L226 Difference]: Without dead ends: 1396 [2022-01-18 17:31:36,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:31:36,700 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 269 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:36,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 197 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-01-18 17:31:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 485. [2022-01-18 17:31:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.1714876033057853) internal successors, (1535), 484 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1535 transitions. [2022-01-18 17:31:36,713 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1535 transitions. Word has length 26 [2022-01-18 17:31:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:36,713 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1535 transitions. [2022-01-18 17:31:36,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1535 transitions. [2022-01-18 17:31:36,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:36,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:36,714 INFO 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] [2022-01-18 17:31:36,731 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 17:31:36,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 17:31:36,930 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1976268135, now seen corresponding path program 13 times [2022-01-18 17:31:36,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:36,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709481548] [2022-01-18 17:31:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:36,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:36,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:36,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709481548] [2022-01-18 17:31:36,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709481548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:36,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830544131] [2022-01-18 17:31:36,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:31:36,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:36,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:36,969 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 17:31:36,969 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 17:31:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:37,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:37,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830544131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:37,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:37,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:31:37,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816742373] [2022-01-18 17:31:37,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:37,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:31:37,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:31:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:31:37,157 INFO L87 Difference]: Start difference. First operand 485 states and 1535 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:37,981 INFO L93 Difference]: Finished difference Result 2177 states and 6037 transitions. [2022-01-18 17:31:37,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:31:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:37,989 INFO L225 Difference]: With dead ends: 2177 [2022-01-18 17:31:37,989 INFO L226 Difference]: Without dead ends: 2177 [2022-01-18 17:31:37,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:31:37,990 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 427 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:37,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 306 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-01-18 17:31:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 509. [2022-01-18 17:31:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.22244094488189) internal successors, (1637), 508 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1637 transitions. [2022-01-18 17:31:38,008 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1637 transitions. Word has length 26 [2022-01-18 17:31:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1637 transitions. [2022-01-18 17:31:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1637 transitions. [2022-01-18 17:31:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:38,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:38,009 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] [2022-01-18 17:31:38,027 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 17:31:38,209 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,SelfDestructingSolverStorable14 [2022-01-18 17:31:38,209 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 845077903, now seen corresponding path program 1 times [2022-01-18 17:31:38,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751985280] [2022-01-18 17:31:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:38,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:38,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751985280] [2022-01-18 17:31:38,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751985280] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754992550] [2022-01-18 17:31:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:38,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:38,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:38,279 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 17:31:38,280 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 17:31:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:31:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:38,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754992550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:38,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:38,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 17:31:38,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550045428] [2022-01-18 17:31:38,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:38,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 17:31:38,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:38,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 17:31:38,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 17:31:38,428 INFO L87 Difference]: Start difference. First operand 509 states and 1637 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 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 17:31:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:38,530 INFO L93 Difference]: Finished difference Result 734 states and 2247 transitions. [2022-01-18 17:31:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 17:31:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 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 26 [2022-01-18 17:31:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:38,533 INFO L225 Difference]: With dead ends: 734 [2022-01-18 17:31:38,533 INFO L226 Difference]: Without dead ends: 734 [2022-01-18 17:31:38,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:31:38,533 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:38,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 52 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:31:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-01-18 17:31:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 529. [2022-01-18 17:31:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.234848484848485) internal successors, (1708), 528 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1708 transitions. [2022-01-18 17:31:38,542 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1708 transitions. Word has length 26 [2022-01-18 17:31:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:38,542 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 1708 transitions. [2022-01-18 17:31:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 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 17:31:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1708 transitions. [2022-01-18 17:31:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:38,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:38,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:38,559 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 17:31:38,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:38,759 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1808051533, now seen corresponding path program 14 times [2022-01-18 17:31:38,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:38,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556400195] [2022-01-18 17:31:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:38,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:38,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:38,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556400195] [2022-01-18 17:31:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556400195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:38,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781361926] [2022-01-18 17:31:38,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:38,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:38,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:38,797 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 17:31:38,798 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 17:31:38,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:38,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:38,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781361926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:38,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:38,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:31:38,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486176849] [2022-01-18 17:31:38,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:38,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:31:38,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:31:38,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:31:38,929 INFO L87 Difference]: Start difference. First operand 529 states and 1708 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) 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 17:31:39,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:39,243 INFO L93 Difference]: Finished difference Result 1299 states and 3870 transitions. [2022-01-18 17:31:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:31:39,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) 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 26 [2022-01-18 17:31:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:39,247 INFO L225 Difference]: With dead ends: 1299 [2022-01-18 17:31:39,247 INFO L226 Difference]: Without dead ends: 1299 [2022-01-18 17:31:39,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:31:39,247 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:39,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 160 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-01-18 17:31:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 559. [2022-01-18 17:31:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.227598566308244) internal successors, (1801), 558 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1801 transitions. [2022-01-18 17:31:39,259 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1801 transitions. Word has length 26 [2022-01-18 17:31:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:39,259 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1801 transitions. [2022-01-18 17:31:39,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) 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 17:31:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1801 transitions. [2022-01-18 17:31:39,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:39,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:39,261 INFO 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] [2022-01-18 17:31:39,276 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 17:31:39,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 17:31:39,475 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:39,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -957947885, now seen corresponding path program 15 times [2022-01-18 17:31:39,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:39,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139319786] [2022-01-18 17:31:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:39,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:39,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139319786] [2022-01-18 17:31:39,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139319786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271811969] [2022-01-18 17:31:39,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:39,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:39,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:39,530 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 17:31:39,531 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 17:31:39,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:31:39,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:39,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:39,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:39,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271811969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:39,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:39,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:31:39,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584663213] [2022-01-18 17:31:39,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:39,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:31:39,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:31:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:31:39,744 INFO L87 Difference]: Start difference. First operand 559 states and 1801 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:40,344 INFO L93 Difference]: Finished difference Result 2205 states and 6353 transitions. [2022-01-18 17:31:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:31:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:40,350 INFO L225 Difference]: With dead ends: 2205 [2022-01-18 17:31:40,350 INFO L226 Difference]: Without dead ends: 2205 [2022-01-18 17:31:40,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:31:40,351 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 472 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:40,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 247 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2022-01-18 17:31:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 652. [2022-01-18 17:31:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 651 states have (on average 3.3179723502304146) internal successors, (2160), 651 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2160 transitions. [2022-01-18 17:31:40,370 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2160 transitions. Word has length 26 [2022-01-18 17:31:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:40,370 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2160 transitions. [2022-01-18 17:31:40,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2160 transitions. [2022-01-18 17:31:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:40,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:40,372 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] [2022-01-18 17:31:40,388 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 17:31:40,588 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,SelfDestructingSolverStorable17 [2022-01-18 17:31:40,588 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2007423219, now seen corresponding path program 2 times [2022-01-18 17:31:40,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:40,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697394869] [2022-01-18 17:31:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:40,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:40,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697394869] [2022-01-18 17:31:40,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697394869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837165978] [2022-01-18 17:31:40,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:40,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:40,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:40,613 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 17:31:40,614 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 17:31:40,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:40,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:40,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 17:31:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:40,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:40,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837165978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:40,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:40,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 17:31:40,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115962198] [2022-01-18 17:31:40,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:40,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 17:31:40,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:40,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 17:31:40,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 17:31:40,780 INFO L87 Difference]: Start difference. First operand 652 states and 2160 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:40,906 INFO L93 Difference]: Finished difference Result 1170 states and 3661 transitions. [2022-01-18 17:31:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 17:31:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:40,909 INFO L225 Difference]: With dead ends: 1170 [2022-01-18 17:31:40,909 INFO L226 Difference]: Without dead ends: 1146 [2022-01-18 17:31:40,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:31:40,909 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 167 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:40,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 58 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:31:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-01-18 17:31:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 757. [2022-01-18 17:31:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.3465608465608465) internal successors, (2530), 756 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2530 transitions. [2022-01-18 17:31:40,936 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2530 transitions. Word has length 26 [2022-01-18 17:31:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:40,936 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2530 transitions. [2022-01-18 17:31:40,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2530 transitions. [2022-01-18 17:31:40,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:40,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:40,938 INFO 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] [2022-01-18 17:31:40,967 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 17:31:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:41,154 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:41,155 INFO L85 PathProgramCache]: Analyzing trace with hash -370202563, now seen corresponding path program 16 times [2022-01-18 17:31:41,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:41,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189788688] [2022-01-18 17:31:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:41,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:41,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:41,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189788688] [2022-01-18 17:31:41,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189788688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:41,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800986276] [2022-01-18 17:31:41,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:31:41,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:41,198 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 17:31:41,199 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 17:31:41,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:31:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:41,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:41,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:41,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800986276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:41,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:41,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 17:31:41,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549622776] [2022-01-18 17:31:41,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:41,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:31:41,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:31:41,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:31:41,397 INFO L87 Difference]: Start difference. First operand 757 states and 2530 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:42,178 INFO L93 Difference]: Finished difference Result 2137 states and 6442 transitions. [2022-01-18 17:31:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:31:42,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:42,183 INFO L225 Difference]: With dead ends: 2137 [2022-01-18 17:31:42,183 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 17:31:42,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:31:42,184 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 312 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:42,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 223 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 17:31:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 804. [2022-01-18 17:31:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.415940224159402) internal successors, (2743), 803 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2743 transitions. [2022-01-18 17:31:42,207 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2743 transitions. Word has length 26 [2022-01-18 17:31:42,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:42,207 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 2743 transitions. [2022-01-18 17:31:42,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2743 transitions. [2022-01-18 17:31:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:42,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:42,209 INFO 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] [2022-01-18 17:31:42,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 17:31:42,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:42,415 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:42,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1473534255, now seen corresponding path program 17 times [2022-01-18 17:31:42,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:42,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367917765] [2022-01-18 17:31:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:42,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:42,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367917765] [2022-01-18 17:31:42,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367917765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:42,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952901607] [2022-01-18 17:31:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:42,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:42,480 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 17:31:42,495 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 17:31:42,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:31:42,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:42,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:42,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:42,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:42,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952901607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:42,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:42,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:31:42,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676125988] [2022-01-18 17:31:42,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:42,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:31:42,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:31:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:31:42,683 INFO L87 Difference]: Start difference. First operand 804 states and 2743 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:43,337 INFO L93 Difference]: Finished difference Result 2884 states and 8879 transitions. [2022-01-18 17:31:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:31:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:43,343 INFO L225 Difference]: With dead ends: 2884 [2022-01-18 17:31:43,343 INFO L226 Difference]: Without dead ends: 2884 [2022-01-18 17:31:43,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:31:43,344 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 362 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:43,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 223 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-01-18 17:31:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 926. [2022-01-18 17:31:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.5945945945945947) internal successors, (3325), 925 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3325 transitions. [2022-01-18 17:31:43,373 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3325 transitions. Word has length 26 [2022-01-18 17:31:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:43,373 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3325 transitions. [2022-01-18 17:31:43,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3325 transitions. [2022-01-18 17:31:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:43,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:43,375 INFO 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] [2022-01-18 17:31:43,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 17:31:43,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:43,591 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash 465961067, now seen corresponding path program 18 times [2022-01-18 17:31:43,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:43,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288267643] [2022-01-18 17:31:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:43,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:43,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:43,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288267643] [2022-01-18 17:31:43,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288267643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:43,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494709342] [2022-01-18 17:31:43,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:31:43,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:43,654 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 17:31:43,655 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 17:31:43,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:31:43,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:43,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:43,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:31:43,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494709342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:43,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:43,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 17:31:43,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054376289] [2022-01-18 17:31:43,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:43,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:31:43,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:31:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:31:43,870 INFO L87 Difference]: Start difference. First operand 926 states and 3325 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:44,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:44,693 INFO L93 Difference]: Finished difference Result 3162 states and 9670 transitions. [2022-01-18 17:31:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:31:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:44,701 INFO L225 Difference]: With dead ends: 3162 [2022-01-18 17:31:44,701 INFO L226 Difference]: Without dead ends: 3162 [2022-01-18 17:31:44,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:31:44,703 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 412 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:44,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 241 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-01-18 17:31:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 923. [2022-01-18 17:31:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.5911062906724514) internal successors, (3311), 922 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:44,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3311 transitions. [2022-01-18 17:31:44,735 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3311 transitions. Word has length 26 [2022-01-18 17:31:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:44,736 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 3311 transitions. [2022-01-18 17:31:44,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3311 transitions. [2022-01-18 17:31:44,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:44,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:44,738 INFO 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] [2022-01-18 17:31:44,777 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 17:31:44,953 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,SelfDestructingSolverStorable21 [2022-01-18 17:31:44,954 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:44,954 INFO L85 PathProgramCache]: Analyzing trace with hash -654035971, now seen corresponding path program 19 times [2022-01-18 17:31:44,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:44,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449257053] [2022-01-18 17:31:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:44,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:44,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449257053] [2022-01-18 17:31:44,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449257053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:44,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925179435] [2022-01-18 17:31:44,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:31:44,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:44,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:44,996 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 17:31:44,997 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 17:31:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:45,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:45,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925179435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:45,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:45,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:31:45,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613924098] [2022-01-18 17:31:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:45,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:31:45,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:45,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:31:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:31:45,167 INFO L87 Difference]: Start difference. First operand 923 states and 3311 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 17:31:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:45,691 INFO L93 Difference]: Finished difference Result 2838 states and 8728 transitions. [2022-01-18 17:31:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:31:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 26 [2022-01-18 17:31:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:45,697 INFO L225 Difference]: With dead ends: 2838 [2022-01-18 17:31:45,697 INFO L226 Difference]: Without dead ends: 2834 [2022-01-18 17:31:45,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:31:45,698 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 327 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:45,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 198 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2022-01-18 17:31:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 929. [2022-01-18 17:31:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.5905172413793105) internal successors, (3332), 928 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:45,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3332 transitions. [2022-01-18 17:31:45,727 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3332 transitions. Word has length 26 [2022-01-18 17:31:45,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:45,727 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 3332 transitions. [2022-01-18 17:31:45,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 17:31:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3332 transitions. [2022-01-18 17:31:45,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:45,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:45,729 INFO 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] [2022-01-18 17:31:45,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 17:31:45,945 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,SelfDestructingSolverStorable22 [2022-01-18 17:31:45,945 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -383526279, now seen corresponding path program 20 times [2022-01-18 17:31:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339305492] [2022-01-18 17:31:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:45,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:45,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339305492] [2022-01-18 17:31:45,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339305492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123751724] [2022-01-18 17:31:45,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:45,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:45,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:45,987 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 17:31:45,988 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 17:31:46,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:46,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:46,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123751724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:46,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:46,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 17:31:46,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263482950] [2022-01-18 17:31:46,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:46,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:31:46,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:31:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:31:46,157 INFO L87 Difference]: Start difference. First operand 929 states and 3332 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 17:31:46,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:46,746 INFO L93 Difference]: Finished difference Result 3029 states and 9169 transitions. [2022-01-18 17:31:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:31:46,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 26 [2022-01-18 17:31:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:46,753 INFO L225 Difference]: With dead ends: 3029 [2022-01-18 17:31:46,753 INFO L226 Difference]: Without dead ends: 3029 [2022-01-18 17:31:46,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:31:46,753 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 440 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:46,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 223 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-01-18 17:31:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 925. [2022-01-18 17:31:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 3.593073593073593) internal successors, (3320), 924 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 3320 transitions. [2022-01-18 17:31:46,783 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 3320 transitions. Word has length 26 [2022-01-18 17:31:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:46,783 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 3320 transitions. [2022-01-18 17:31:46,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 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 17:31:46,783 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 3320 transitions. [2022-01-18 17:31:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:46,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:46,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:46,801 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 17:31:47,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:47,001 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash 201501907, now seen corresponding path program 21 times [2022-01-18 17:31:47,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248272660] [2022-01-18 17:31:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:47,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:47,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248272660] [2022-01-18 17:31:47,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248272660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40695855] [2022-01-18 17:31:47,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:47,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:47,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:47,041 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 17:31:47,056 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 17:31:47,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:31:47,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:47,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:47,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:47,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:47,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40695855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:47,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:47,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:31:47,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155707699] [2022-01-18 17:31:47,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:47,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:31:47,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:31:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:31:47,232 INFO L87 Difference]: Start difference. First operand 925 states and 3320 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:47,783 INFO L93 Difference]: Finished difference Result 2778 states and 8527 transitions. [2022-01-18 17:31:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:31:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:47,789 INFO L225 Difference]: With dead ends: 2778 [2022-01-18 17:31:47,789 INFO L226 Difference]: Without dead ends: 2766 [2022-01-18 17:31:47,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=508, Invalid=1748, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:31:47,790 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 274 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:47,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 206 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-01-18 17:31:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 943. [2022-01-18 17:31:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 3.58067940552017) internal successors, (3373), 942 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 3373 transitions. [2022-01-18 17:31:47,833 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 3373 transitions. Word has length 26 [2022-01-18 17:31:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 3373 transitions. [2022-01-18 17:31:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 3373 transitions. [2022-01-18 17:31:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:47,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:47,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:47,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 17:31:48,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:48,052 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1290502825, now seen corresponding path program 22 times [2022-01-18 17:31:48,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:48,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61325331] [2022-01-18 17:31:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:48,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:48,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61325331] [2022-01-18 17:31:48,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61325331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338713851] [2022-01-18 17:31:48,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:31:48,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:48,084 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 17:31:48,086 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 17:31:48,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:31:48,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:48,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:48,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338713851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:48,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:48,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:31:48,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737353419] [2022-01-18 17:31:48,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:48,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:31:48,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:31:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:31:48,235 INFO L87 Difference]: Start difference. First operand 943 states and 3373 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:48,671 INFO L93 Difference]: Finished difference Result 2518 states and 7974 transitions. [2022-01-18 17:31:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:31:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:48,676 INFO L225 Difference]: With dead ends: 2518 [2022-01-18 17:31:48,676 INFO L226 Difference]: Without dead ends: 2514 [2022-01-18 17:31:48,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:31:48,677 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 309 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:48,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 147 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-01-18 17:31:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 993. [2022-01-18 17:31:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.5524193548387095) internal successors, (3524), 992 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3524 transitions. [2022-01-18 17:31:48,703 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3524 transitions. Word has length 26 [2022-01-18 17:31:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 3524 transitions. [2022-01-18 17:31:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3524 transitions. [2022-01-18 17:31:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:48,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:48,705 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:48,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 17:31:48,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 17:31:48,921 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:48,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1019993133, now seen corresponding path program 23 times [2022-01-18 17:31:48,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:48,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649335110] [2022-01-18 17:31:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:48,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:48,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:48,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649335110] [2022-01-18 17:31:48,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649335110] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:48,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717932953] [2022-01-18 17:31:48,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:48,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:48,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:48,957 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:31:48,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 17:31:48,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:31:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:49,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:49,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717932953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:49,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:49,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 17:31:49,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19111913] [2022-01-18 17:31:49,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:49,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:31:49,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:31:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:31:49,112 INFO L87 Difference]: Start difference. First operand 993 states and 3524 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:49,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:49,667 INFO L93 Difference]: Finished difference Result 2664 states and 8331 transitions. [2022-01-18 17:31:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:31:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:49,675 INFO L225 Difference]: With dead ends: 2664 [2022-01-18 17:31:49,676 INFO L226 Difference]: Without dead ends: 2664 [2022-01-18 17:31:49,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 17:31:49,676 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 297 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:49,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 164 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-01-18 17:31:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 983. [2022-01-18 17:31:49,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 3.5570264765784114) internal successors, (3493), 982 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3493 transitions. [2022-01-18 17:31:49,700 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3493 transitions. Word has length 26 [2022-01-18 17:31:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:49,700 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 3493 transitions. [2022-01-18 17:31:49,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3493 transitions. [2022-01-18 17:31:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:49,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:49,702 INFO 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] [2022-01-18 17:31:49,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 17:31:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 17:31:49,918 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1735381837, now seen corresponding path program 24 times [2022-01-18 17:31:49,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:49,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136690409] [2022-01-18 17:31:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:49,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:49,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136690409] [2022-01-18 17:31:49,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136690409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:49,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297137194] [2022-01-18 17:31:49,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:31:49,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:49,957 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:31:49,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 17:31:49,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:31:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:49,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:31:49,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:50,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:50,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297137194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:50,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:50,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 17:31:50,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364065873] [2022-01-18 17:31:50,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:31:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:31:50,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:31:50,139 INFO L87 Difference]: Start difference. First operand 983 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:50,670 INFO L93 Difference]: Finished difference Result 2141 states and 6857 transitions. [2022-01-18 17:31:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:31:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:50,679 INFO L225 Difference]: With dead ends: 2141 [2022-01-18 17:31:50,679 INFO L226 Difference]: Without dead ends: 2133 [2022-01-18 17:31:50,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 17:31:50,680 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 263 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:50,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 178 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2022-01-18 17:31:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 984. [2022-01-18 17:31:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.5595116988809767) internal successors, (3499), 983 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3499 transitions. [2022-01-18 17:31:50,701 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3499 transitions. Word has length 26 [2022-01-18 17:31:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:50,701 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 3499 transitions. [2022-01-18 17:31:50,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3499 transitions. [2022-01-18 17:31:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:31:50,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:50,703 INFO 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] [2022-01-18 17:31:50,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 17:31:50,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 17:31:50,919 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:50,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash -619306999, now seen corresponding path program 3 times [2022-01-18 17:31:50,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:50,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139629810] [2022-01-18 17:31:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:50,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:51,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139629810] [2022-01-18 17:31:51,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139629810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394055266] [2022-01-18 17:31:51,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:51,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:51,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:51,130 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:31:51,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 17:31:51,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:31:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:51,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:51,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:51,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:51,402 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:31:51,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:31:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:31:51,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:51,641 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:31:51,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:31:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:31:51,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394055266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:51,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:51,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 17:31:51,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885634977] [2022-01-18 17:31:51,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:51,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:31:51,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:51,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:31:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:31:51,810 INFO L87 Difference]: Start difference. First operand 984 states and 3499 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:53,078 INFO L93 Difference]: Finished difference Result 2741 states and 8807 transitions. [2022-01-18 17:31:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:31:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:31:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:53,084 INFO L225 Difference]: With dead ends: 2741 [2022-01-18 17:31:53,084 INFO L226 Difference]: Without dead ends: 2584 [2022-01-18 17:31:53,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=821, Invalid=4149, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:31:53,085 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 560 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:53,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 367 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 722 Invalid, 0 Unknown, 495 Unchecked, 0.4s Time] [2022-01-18 17:31:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-01-18 17:31:53,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1171. [2022-01-18 17:31:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.4752136752136753) internal successors, (4066), 1170 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 4066 transitions. [2022-01-18 17:31:53,110 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 4066 transitions. Word has length 28 [2022-01-18 17:31:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:53,110 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 4066 transitions. [2022-01-18 17:31:53,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 4066 transitions. [2022-01-18 17:31:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:31:53,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:53,112 INFO 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] [2022-01-18 17:31:53,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 17:31:53,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 17:31:53,328 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1096873097, now seen corresponding path program 4 times [2022-01-18 17:31:53,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394554104] [2022-01-18 17:31:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:53,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:53,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:53,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394554104] [2022-01-18 17:31:53,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394554104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:53,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242010995] [2022-01-18 17:31:53,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:31:53,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:53,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:53,586 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:31:53,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 17:31:53,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:31:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:31:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:53,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:31:53,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:31:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:54,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:54,060 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:31:54,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:31:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:54,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242010995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:54,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:54,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 17:31:54,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116635006] [2022-01-18 17:31:54,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:54,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:31:54,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:31:54,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:31:54,384 INFO L87 Difference]: Start difference. First operand 1171 states and 4066 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 17:31:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:55,922 INFO L93 Difference]: Finished difference Result 2434 states and 7660 transitions. [2022-01-18 17:31:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:31:55,923 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 28 [2022-01-18 17:31:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:55,927 INFO L225 Difference]: With dead ends: 2434 [2022-01-18 17:31:55,928 INFO L226 Difference]: Without dead ends: 2420 [2022-01-18 17:31:55,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=783, Invalid=3249, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:31:55,928 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 531 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:55,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 278 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 550 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2022-01-18 17:31:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-01-18 17:31:55,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1228. [2022-01-18 17:31:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 3.493072534637327) internal successors, (4286), 1227 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 4286 transitions. [2022-01-18 17:31:55,950 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 4286 transitions. Word has length 28 [2022-01-18 17:31:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:55,950 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 4286 transitions. [2022-01-18 17:31:55,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 17:31:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 4286 transitions. [2022-01-18 17:31:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:31:55,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:55,952 INFO 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] [2022-01-18 17:31:55,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 17:31:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:56,153 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:31:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1118800371, now seen corresponding path program 5 times [2022-01-18 17:31:56,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:56,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849927948] [2022-01-18 17:31:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:56,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:56,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849927948] [2022-01-18 17:31:56,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849927948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775726407] [2022-01-18 17:31:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:56,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:56,380 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:31:56,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 17:31:56,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:31:56,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:56,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:31:56,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:56,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:31:56,623 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:31:56,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:31:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:56,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:56,795 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:31:56,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:31:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775726407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:57,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:57,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-01-18 17:31:57,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246201675] [2022-01-18 17:31:57,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:31:57,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:31:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:31:57,024 INFO L87 Difference]: Start difference. First operand 1228 states and 4286 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 17:32:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:00,042 INFO L93 Difference]: Finished difference Result 3044 states and 9116 transitions. [2022-01-18 17:32:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 17:32:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 28 [2022-01-18 17:32:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:00,048 INFO L225 Difference]: With dead ends: 3044 [2022-01-18 17:32:00,048 INFO L226 Difference]: Without dead ends: 3010 [2022-01-18 17:32:00,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5332 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2250, Invalid=11556, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 17:32:00,050 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 806 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:00,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 531 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 870 Invalid, 0 Unknown, 732 Unchecked, 0.4s Time] [2022-01-18 17:32:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-01-18 17:32:00,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 1385. [2022-01-18 17:32:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 3.538294797687861) internal successors, (4897), 1384 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4897 transitions. [2022-01-18 17:32:00,080 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4897 transitions. Word has length 28 [2022-01-18 17:32:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:00,080 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 4897 transitions. [2022-01-18 17:32:00,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 17:32:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4897 transitions. [2022-01-18 17:32:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:00,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:00,082 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] [2022-01-18 17:32:00,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:00,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:00,295 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1056275707, now seen corresponding path program 25 times [2022-01-18 17:32:00,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:00,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668318576] [2022-01-18 17:32:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:00,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:00,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668318576] [2022-01-18 17:32:00,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668318576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834836066] [2022-01-18 17:32:00,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:32:00,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:00,599 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:00,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 17:32:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:32:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:00,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:32:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:00,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:32:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:00,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:01,020 INFO L353 Elim1Store]: treesize reduction 20, result has 31.0 percent of original size [2022-01-18 17:32:01,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 22 [2022-01-18 17:32:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:01,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834836066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:01,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:01,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2022-01-18 17:32:01,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114692853] [2022-01-18 17:32:01,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:01,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:32:01,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:01,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:32:01,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:32:01,286 INFO L87 Difference]: Start difference. First operand 1385 states and 4897 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:05,128 INFO L93 Difference]: Finished difference Result 2663 states and 8706 transitions. [2022-01-18 17:32:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 17:32:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:05,134 INFO L225 Difference]: With dead ends: 2663 [2022-01-18 17:32:05,134 INFO L226 Difference]: Without dead ends: 2636 [2022-01-18 17:32:05,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4309 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1806, Invalid=11304, Unknown=0, NotChecked=0, Total=13110 [2022-01-18 17:32:05,135 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 564 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:05,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 419 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1923 Invalid, 0 Unknown, 68 Unchecked, 0.8s Time] [2022-01-18 17:32:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-01-18 17:32:05,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1620. [2022-01-18 17:32:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.449042618900556) internal successors, (5584), 1619 states have internal predecessors, (5584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5584 transitions. [2022-01-18 17:32:05,163 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5584 transitions. Word has length 28 [2022-01-18 17:32:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:05,163 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 5584 transitions. [2022-01-18 17:32:05,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5584 transitions. [2022-01-18 17:32:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:05,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:05,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:05,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:05,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-01-18 17:32:05,383 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -418897327, now seen corresponding path program 6 times [2022-01-18 17:32:05,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:05,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062746982] [2022-01-18 17:32:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:05,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:05,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062746982] [2022-01-18 17:32:05,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062746982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505294421] [2022-01-18 17:32:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:32:05,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:05,645 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 17:32:05,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:32:05,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:32:05,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:05,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:05,893 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:05,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:05,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:06,080 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:06,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505294421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:06,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:06,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-01-18 17:32:06,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842835424] [2022-01-18 17:32:06,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:06,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:32:06,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:32:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:32:06,250 INFO L87 Difference]: Start difference. First operand 1620 states and 5584 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:07,574 INFO L93 Difference]: Finished difference Result 2371 states and 7702 transitions. [2022-01-18 17:32:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:32:07,574 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:07,579 INFO L225 Difference]: With dead ends: 2371 [2022-01-18 17:32:07,579 INFO L226 Difference]: Without dead ends: 2357 [2022-01-18 17:32:07,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=576, Invalid=2846, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:32:07,579 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 375 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:07,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 353 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 609 Invalid, 0 Unknown, 530 Unchecked, 0.3s Time] [2022-01-18 17:32:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-01-18 17:32:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1669. [2022-01-18 17:32:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.4502398081534773) internal successors, (5755), 1668 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5755 transitions. [2022-01-18 17:32:07,605 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5755 transitions. Word has length 28 [2022-01-18 17:32:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:07,605 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 5755 transitions. [2022-01-18 17:32:07,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5755 transitions. [2022-01-18 17:32:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:07,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:07,608 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] [2022-01-18 17:32:07,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:07,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:07,823 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1851738833, now seen corresponding path program 26 times [2022-01-18 17:32:07,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400293101] [2022-01-18 17:32:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:07,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:08,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400293101] [2022-01-18 17:32:08,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400293101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:08,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409043714] [2022-01-18 17:32:08,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:32:08,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:08,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:08,077 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:08,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 17:32:08,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:32:08,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:08,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:32:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:08,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:08,298 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:08,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:08,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:08,617 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:08,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:08,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409043714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:08,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:08,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 17:32:08,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351633849] [2022-01-18 17:32:08,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:08,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:32:08,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:32:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:32:08,817 INFO L87 Difference]: Start difference. First operand 1669 states and 5755 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 17:32:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:19,092 INFO L93 Difference]: Finished difference Result 5759 states and 17999 transitions. [2022-01-18 17:32:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-01-18 17:32:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 28 [2022-01-18 17:32:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:19,103 INFO L225 Difference]: With dead ends: 5759 [2022-01-18 17:32:19,103 INFO L226 Difference]: Without dead ends: 5521 [2022-01-18 17:32:19,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24477 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=6244, Invalid=49688, Unknown=0, NotChecked=0, Total=55932 [2022-01-18 17:32:19,106 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 891 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3320 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:19,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 919 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1475 Invalid, 0 Unknown, 3320 Unchecked, 0.7s Time] [2022-01-18 17:32:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2022-01-18 17:32:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 2289. [2022-01-18 17:32:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2288 states have (on average 3.513986013986014) internal successors, (8040), 2288 states have internal predecessors, (8040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 8040 transitions. [2022-01-18 17:32:19,171 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 8040 transitions. Word has length 28 [2022-01-18 17:32:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:19,171 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 8040 transitions. [2022-01-18 17:32:19,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 17:32:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 8040 transitions. [2022-01-18 17:32:19,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:19,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:19,175 INFO 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] [2022-01-18 17:32:19,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:19,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:19,390 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:19,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:19,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1976681611, now seen corresponding path program 7 times [2022-01-18 17:32:19,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:19,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79617830] [2022-01-18 17:32:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:19,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:19,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79617830] [2022-01-18 17:32:19,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79617830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:19,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535894127] [2022-01-18 17:32:19,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:32:19,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:19,622 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:19,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 17:32:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:32:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:19,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:19,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:20,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:20,055 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:20,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535894127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:20,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 17:32:20,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454657179] [2022-01-18 17:32:20,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:20,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:32:20,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:32:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:32:20,342 INFO L87 Difference]: Start difference. First operand 2289 states and 8040 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 17:32:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:22,025 INFO L93 Difference]: Finished difference Result 4514 states and 14306 transitions. [2022-01-18 17:32:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:32:22,026 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 28 [2022-01-18 17:32:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:22,032 INFO L225 Difference]: With dead ends: 4514 [2022-01-18 17:32:22,032 INFO L226 Difference]: Without dead ends: 3964 [2022-01-18 17:32:22,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=802, Invalid=3358, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:32:22,033 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 542 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:22,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 291 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 794 Invalid, 0 Unknown, 328 Unchecked, 0.4s Time] [2022-01-18 17:32:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2022-01-18 17:32:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 2294. [2022-01-18 17:32:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.4888791975577846) internal successors, (8000), 2293 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8000 transitions. [2022-01-18 17:32:22,073 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8000 transitions. Word has length 28 [2022-01-18 17:32:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:22,073 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 8000 transitions. [2022-01-18 17:32:22,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 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 17:32:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8000 transitions. [2022-01-18 17:32:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:22,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:22,077 INFO 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] [2022-01-18 17:32:22,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 17:32:22,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-18 17:32:22,291 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash 114975881, now seen corresponding path program 8 times [2022-01-18 17:32:22,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:22,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367511646] [2022-01-18 17:32:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:22,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:22,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:22,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367511646] [2022-01-18 17:32:22,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367511646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:22,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242446824] [2022-01-18 17:32:22,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:32:22,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:22,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:22,548 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:22,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 17:32:22,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:32:22,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:32:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:22,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:22,796 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:22,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:22,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:22,967 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:22,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:23,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242446824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:23,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:23,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-01-18 17:32:23,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663734732] [2022-01-18 17:32:23,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:23,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:32:23,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:23,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:32:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:32:23,121 INFO L87 Difference]: Start difference. First operand 2294 states and 8000 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:24,459 INFO L93 Difference]: Finished difference Result 3130 states and 10228 transitions. [2022-01-18 17:32:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:32:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:24,464 INFO L225 Difference]: With dead ends: 3130 [2022-01-18 17:32:24,464 INFO L226 Difference]: Without dead ends: 3112 [2022-01-18 17:32:24,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=586, Invalid=2954, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:32:24,465 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 408 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:24,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 354 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 582 Invalid, 0 Unknown, 552 Unchecked, 0.3s Time] [2022-01-18 17:32:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2022-01-18 17:32:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2324. [2022-01-18 17:32:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 3.484287559190702) internal successors, (8094), 2323 states have internal predecessors, (8094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 8094 transitions. [2022-01-18 17:32:24,497 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 8094 transitions. Word has length 28 [2022-01-18 17:32:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 2324 states and 8094 transitions. [2022-01-18 17:32:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 8094 transitions. [2022-01-18 17:32:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:24,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:24,501 INFO 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] [2022-01-18 17:32:24,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-18 17:32:24,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 17:32:24,709 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1675136757, now seen corresponding path program 9 times [2022-01-18 17:32:24,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951195383] [2022-01-18 17:32:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:24,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:24,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:24,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951195383] [2022-01-18 17:32:24,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951195383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:24,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490565142] [2022-01-18 17:32:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:32:24,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:24,956 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:24,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 17:32:24,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:32:24,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:32:24,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:25,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:25,184 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:25,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:25,439 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:25,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:32:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490565142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:25,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:25,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-01-18 17:32:25,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703010230] [2022-01-18 17:32:25,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:25,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 17:32:25,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 17:32:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 17:32:25,583 INFO L87 Difference]: Start difference. First operand 2324 states and 8094 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 17:32:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:27,003 INFO L93 Difference]: Finished difference Result 3157 states and 10316 transitions. [2022-01-18 17:32:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:32:27,003 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 28 [2022-01-18 17:32:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:27,008 INFO L225 Difference]: With dead ends: 3157 [2022-01-18 17:32:27,008 INFO L226 Difference]: Without dead ends: 3121 [2022-01-18 17:32:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=540, Invalid=2766, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:32:27,008 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 389 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 947 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:27,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 359 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 595 Invalid, 0 Unknown, 947 Unchecked, 0.3s Time] [2022-01-18 17:32:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-01-18 17:32:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2355. [2022-01-18 17:32:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.4766355140186915) internal successors, (8184), 2354 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8184 transitions. [2022-01-18 17:32:27,042 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8184 transitions. Word has length 28 [2022-01-18 17:32:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:27,043 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 8184 transitions. [2022-01-18 17:32:27,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 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 17:32:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8184 transitions. [2022-01-18 17:32:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:27,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:27,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:27,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:27,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 17:32:27,259 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1315804659, now seen corresponding path program 10 times [2022-01-18 17:32:27,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:27,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127770661] [2022-01-18 17:32:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:27,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:27,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:27,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127770661] [2022-01-18 17:32:27,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127770661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:27,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626113855] [2022-01-18 17:32:27,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:32:27,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:27,507 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:27,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 17:32:27,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:32:27,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:27,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:32:27,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:27,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:27,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:27,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:27,938 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:27,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:28,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626113855] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:28,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:28,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 17:32:28,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819970285] [2022-01-18 17:32:28,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:28,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:32:28,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:28,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:32:28,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:32:28,215 INFO L87 Difference]: Start difference. First operand 2355 states and 8184 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:30,346 INFO L93 Difference]: Finished difference Result 5240 states and 16371 transitions. [2022-01-18 17:32:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:32:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:30,355 INFO L225 Difference]: With dead ends: 5240 [2022-01-18 17:32:30,355 INFO L226 Difference]: Without dead ends: 5044 [2022-01-18 17:32:30,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1015, Invalid=4241, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:32:30,356 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 707 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:30,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 309 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 888 Invalid, 0 Unknown, 171 Unchecked, 0.5s Time] [2022-01-18 17:32:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2022-01-18 17:32:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 2447. [2022-01-18 17:32:30,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 3.4603434178250203) internal successors, (8464), 2446 states have internal predecessors, (8464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 8464 transitions. [2022-01-18 17:32:30,407 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 8464 transitions. Word has length 28 [2022-01-18 17:32:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:30,407 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 8464 transitions. [2022-01-18 17:32:30,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 8464 transitions. [2022-01-18 17:32:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:30,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:30,411 INFO 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] [2022-01-18 17:32:30,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:30,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:30,611 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:30,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:30,611 INFO L85 PathProgramCache]: Analyzing trace with hash 114198423, now seen corresponding path program 11 times [2022-01-18 17:32:30,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:30,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813515752] [2022-01-18 17:32:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:30,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:30,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813515752] [2022-01-18 17:32:30,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813515752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:30,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465985927] [2022-01-18 17:32:30,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:32:30,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:30,855 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:30,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 17:32:30,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:32:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:32:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:31,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:31,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:31,280 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:31,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:31,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465985927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:31,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:31,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 17:32:31,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407347920] [2022-01-18 17:32:31,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:31,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:32:31,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:32:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:32:31,593 INFO L87 Difference]: Start difference. First operand 2447 states and 8464 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:34,190 INFO L93 Difference]: Finished difference Result 4592 states and 14339 transitions. [2022-01-18 17:32:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 17:32:34,190 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:34,197 INFO L225 Difference]: With dead ends: 4592 [2022-01-18 17:32:34,197 INFO L226 Difference]: Without dead ends: 3982 [2022-01-18 17:32:34,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1266, Invalid=7290, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 17:32:34,198 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 539 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:34,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 450 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1311 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2022-01-18 17:32:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2022-01-18 17:32:34,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 2437. [2022-01-18 17:32:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.4564860426929394) internal successors, (8420), 2436 states have internal predecessors, (8420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:34,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8420 transitions. [2022-01-18 17:32:34,238 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8420 transitions. Word has length 28 [2022-01-18 17:32:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:34,238 INFO L470 AbstractCegarLoop]: Abstraction has 2437 states and 8420 transitions. [2022-01-18 17:32:34,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8420 transitions. [2022-01-18 17:32:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:34,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:34,242 INFO 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] [2022-01-18 17:32:34,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:34,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 17:32:34,442 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:34,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:34,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1910068349, now seen corresponding path program 12 times [2022-01-18 17:32:34,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:34,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002646386] [2022-01-18 17:32:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:34,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:34,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002646386] [2022-01-18 17:32:34,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002646386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373644662] [2022-01-18 17:32:34,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:32:34,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:34,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:34,787 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:34,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 17:32:34,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:32:34,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:32:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:34,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:35,001 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:35,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:32:35,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:35,216 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:35,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:32:35,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373644662] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:35,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:35,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2022-01-18 17:32:35,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952347187] [2022-01-18 17:32:35,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:35,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 17:32:35,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 17:32:35,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:32:35,360 INFO L87 Difference]: Start difference. First operand 2437 states and 8420 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:37,314 INFO L93 Difference]: Finished difference Result 5107 states and 16349 transitions. [2022-01-18 17:32:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:32:37,315 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:37,322 INFO L225 Difference]: With dead ends: 5107 [2022-01-18 17:32:37,323 INFO L226 Difference]: Without dead ends: 5003 [2022-01-18 17:32:37,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=898, Invalid=4214, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:32:37,323 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 535 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:37,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 291 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1254 Invalid, 0 Unknown, 213 Unchecked, 0.6s Time] [2022-01-18 17:32:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2022-01-18 17:32:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 2590. [2022-01-18 17:32:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 3.467361915797605) internal successors, (8977), 2589 states have internal predecessors, (8977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 8977 transitions. [2022-01-18 17:32:37,368 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 8977 transitions. Word has length 28 [2022-01-18 17:32:37,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:37,368 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 8977 transitions. [2022-01-18 17:32:37,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 8977 transitions. [2022-01-18 17:32:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:37,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:37,373 INFO 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] [2022-01-18 17:32:37,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 17:32:37,573 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1658751993, now seen corresponding path program 13 times [2022-01-18 17:32:37,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:37,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559793448] [2022-01-18 17:32:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:37,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:37,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:37,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559793448] [2022-01-18 17:32:37,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559793448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:37,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972467180] [2022-01-18 17:32:37,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:32:37,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:37,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:37,802 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:37,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 17:32:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:32:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:38,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:38,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:38,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:38,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:38,266 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:38,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:38,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972467180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:38,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:38,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-18 17:32:38,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365732682] [2022-01-18 17:32:38,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:38,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:32:38,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:38,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:32:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:32:38,549 INFO L87 Difference]: Start difference. First operand 2590 states and 8977 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:42,640 INFO L93 Difference]: Finished difference Result 7272 states and 22400 transitions. [2022-01-18 17:32:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 17:32:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:42,652 INFO L225 Difference]: With dead ends: 7272 [2022-01-18 17:32:42,652 INFO L226 Difference]: Without dead ends: 6253 [2022-01-18 17:32:42,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4695 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2043, Invalid=9729, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 17:32:42,654 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 751 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:42,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [751 Valid, 590 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1320 Invalid, 0 Unknown, 437 Unchecked, 0.6s Time] [2022-01-18 17:32:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2022-01-18 17:32:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 2336. [2022-01-18 17:32:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 3.5190578158458243) internal successors, (8217), 2335 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 8217 transitions. [2022-01-18 17:32:42,719 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 8217 transitions. Word has length 28 [2022-01-18 17:32:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:42,719 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 8217 transitions. [2022-01-18 17:32:42,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 8217 transitions. [2022-01-18 17:32:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:42,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:42,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:42,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:42,923 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1985955337, now seen corresponding path program 14 times [2022-01-18 17:32:42,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:42,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119169781] [2022-01-18 17:32:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:42,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:43,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:43,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119169781] [2022-01-18 17:32:43,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119169781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:43,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812717347] [2022-01-18 17:32:43,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:32:43,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:43,116 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:43,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 17:32:43,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:32:43,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:43,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:32:43,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:43,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:43,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:43,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:43,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:43,566 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:43,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812717347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:43,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:43,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-01-18 17:32:43,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785950726] [2022-01-18 17:32:43,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:43,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:32:43,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:32:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:32:43,831 INFO L87 Difference]: Start difference. First operand 2336 states and 8217 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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 17:32:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:48,336 INFO L93 Difference]: Finished difference Result 6744 states and 20808 transitions. [2022-01-18 17:32:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-18 17:32:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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 28 [2022-01-18 17:32:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:48,346 INFO L225 Difference]: With dead ends: 6744 [2022-01-18 17:32:48,346 INFO L226 Difference]: Without dead ends: 6046 [2022-01-18 17:32:48,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1746, Invalid=10026, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 17:32:48,347 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 707 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:48,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 501 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1947 Invalid, 0 Unknown, 215 Unchecked, 0.9s Time] [2022-01-18 17:32:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2022-01-18 17:32:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 2663. [2022-01-18 17:32:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 3.477460555972953) internal successors, (9257), 2662 states have internal predecessors, (9257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 9257 transitions. [2022-01-18 17:32:48,408 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 9257 transitions. Word has length 28 [2022-01-18 17:32:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:48,408 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 9257 transitions. [2022-01-18 17:32:48,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 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 17:32:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 9257 transitions. [2022-01-18 17:32:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:48,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:48,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:48,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:48,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 17:32:48,628 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 343870545, now seen corresponding path program 15 times [2022-01-18 17:32:48,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:48,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348995909] [2022-01-18 17:32:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:48,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:48,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:48,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348995909] [2022-01-18 17:32:48,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348995909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:48,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824785961] [2022-01-18 17:32:48,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:32:48,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:48,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:48,956 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:48,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 17:32:48,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:32:48,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:48,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:32:48,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:49,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:49,160 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-18 17:32:49,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-18 17:32:49,242 INFO L353 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-01-18 17:32:49,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-01-18 17:32:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:49,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:49,506 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 17:32:49,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 34 [2022-01-18 17:32:49,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:32:49,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2022-01-18 17:32:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:49,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824785961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:49,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:49,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-01-18 17:32:49,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405031161] [2022-01-18 17:32:49,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:49,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:32:49,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:32:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:32:49,751 INFO L87 Difference]: Start difference. First operand 2663 states and 9257 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:52,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:52,579 INFO L93 Difference]: Finished difference Result 5559 states and 18294 transitions. [2022-01-18 17:32:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:32:52,580 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:52,589 INFO L225 Difference]: With dead ends: 5559 [2022-01-18 17:32:52,589 INFO L226 Difference]: Without dead ends: 5190 [2022-01-18 17:32:52,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=721, Invalid=4681, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:32:52,590 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 492 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:52,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 526 Invalid, 2319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1698 Invalid, 0 Unknown, 512 Unchecked, 0.8s Time] [2022-01-18 17:32:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2022-01-18 17:32:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 3152. [2022-01-18 17:32:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3151 states have (on average 3.502697556331323) internal successors, (11037), 3151 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:52,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 11037 transitions. [2022-01-18 17:32:52,644 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 11037 transitions. Word has length 28 [2022-01-18 17:32:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:52,644 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 11037 transitions. [2022-01-18 17:32:52,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 11037 transitions. [2022-01-18 17:32:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:52,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:52,650 INFO 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] [2022-01-18 17:32:52,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:52,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:52,855 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1015948307, now seen corresponding path program 16 times [2022-01-18 17:32:52,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742917342] [2022-01-18 17:32:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:52,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:53,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:53,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742917342] [2022-01-18 17:32:53,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742917342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:53,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701554591] [2022-01-18 17:32:53,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:32:53,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:53,130 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:53,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 17:32:53,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:32:53,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:32:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:53,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:53,365 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:53,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:32:53,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:53,478 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:53,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:32:53,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701554591] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:53,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:53,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-01-18 17:32:53,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221313400] [2022-01-18 17:32:53,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:53,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:32:53,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:32:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:32:53,651 INFO L87 Difference]: Start difference. First operand 3152 states and 11037 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:54,294 INFO L93 Difference]: Finished difference Result 6285 states and 20866 transitions. [2022-01-18 17:32:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:32:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 17:32:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:54,305 INFO L225 Difference]: With dead ends: 6285 [2022-01-18 17:32:54,305 INFO L226 Difference]: Without dead ends: 6055 [2022-01-18 17:32:54,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:32:54,306 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 323 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:54,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 257 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 463 Invalid, 0 Unknown, 558 Unchecked, 0.2s Time] [2022-01-18 17:32:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2022-01-18 17:32:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 3620. [2022-01-18 17:32:54,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 3.4995855208621167) internal successors, (12665), 3619 states have internal predecessors, (12665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 12665 transitions. [2022-01-18 17:32:54,376 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 12665 transitions. Word has length 28 [2022-01-18 17:32:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:54,376 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 12665 transitions. [2022-01-18 17:32:54,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 12665 transitions. [2022-01-18 17:32:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:54,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:54,383 INFO 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] [2022-01-18 17:32:54,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:54,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:54,584 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:54,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1605273733, now seen corresponding path program 17 times [2022-01-18 17:32:54,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:54,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110706423] [2022-01-18 17:32:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:54,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:54,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:54,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110706423] [2022-01-18 17:32:54,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110706423] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:54,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129020097] [2022-01-18 17:32:54,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:32:54,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:54,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:54,895 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:54,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 17:32:54,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:32:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:32:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:55,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:55,118 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:55,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:32:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:55,234 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:32:55,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:32:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:32:55,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129020097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:55,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:55,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 26 [2022-01-18 17:32:55,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737125060] [2022-01-18 17:32:55,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:55,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 17:32:55,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:55,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 17:32:55,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:32:55,390 INFO L87 Difference]: Start difference. First operand 3620 states and 12665 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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 17:32:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:56,113 INFO L93 Difference]: Finished difference Result 6620 states and 22064 transitions. [2022-01-18 17:32:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:32:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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 28 [2022-01-18 17:32:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:56,125 INFO L225 Difference]: With dead ends: 6620 [2022-01-18 17:32:56,126 INFO L226 Difference]: Without dead ends: 6238 [2022-01-18 17:32:56,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=347, Invalid=1723, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:32:56,126 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 296 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:56,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 338 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 563 Invalid, 0 Unknown, 408 Unchecked, 0.2s Time] [2022-01-18 17:32:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2022-01-18 17:32:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 3748. [2022-01-18 17:32:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 3.493461435815319) internal successors, (13090), 3747 states have internal predecessors, (13090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 13090 transitions. [2022-01-18 17:32:56,194 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 13090 transitions. Word has length 28 [2022-01-18 17:32:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:56,195 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 13090 transitions. [2022-01-18 17:32:56,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 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 17:32:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 13090 transitions. [2022-01-18 17:32:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 17:32:56,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:56,201 INFO 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] [2022-01-18 17:32:56,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:56,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 17:32:56,405 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:32:56,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:56,405 INFO L85 PathProgramCache]: Analyzing trace with hash 931718669, now seen corresponding path program 18 times [2022-01-18 17:32:56,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:56,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772975430] [2022-01-18 17:32:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:56,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:56,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:56,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772975430] [2022-01-18 17:32:56,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772975430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663078934] [2022-01-18 17:32:56,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:32:56,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:56,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:56,661 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:32:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 17:32:56,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:32:56,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:32:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:56,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:32:56,885 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:32:56,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:32:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:32:56,993 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-01-18 17:32:56,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:32:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:57,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:57,264 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:32:57,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:32:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:57,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663078934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:57,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:57,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-01-18 17:32:57,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285270347] [2022-01-18 17:32:57,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:57,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:32:57,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:32:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:32:57,563 INFO L87 Difference]: Start difference. First operand 3748 states and 13090 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 17:33:02,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:02,018 INFO L93 Difference]: Finished difference Result 7139 states and 22944 transitions. [2022-01-18 17:33:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-18 17:33:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 28 [2022-01-18 17:33:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:02,030 INFO L225 Difference]: With dead ends: 7139 [2022-01-18 17:33:02,030 INFO L226 Difference]: Without dead ends: 6600 [2022-01-18 17:33:02,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2276, Invalid=12244, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 17:33:02,032 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 573 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:02,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 660 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1713 Invalid, 0 Unknown, 1051 Unchecked, 0.8s Time] [2022-01-18 17:33:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6600 states. [2022-01-18 17:33:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6600 to 3868. [2022-01-18 17:33:02,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3867 states have (on average 3.507887251099043) internal successors, (13565), 3867 states have internal predecessors, (13565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 13565 transitions. [2022-01-18 17:33:02,116 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 13565 transitions. Word has length 28 [2022-01-18 17:33:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:02,117 INFO L470 AbstractCegarLoop]: Abstraction has 3868 states and 13565 transitions. [2022-01-18 17:33:02,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 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 17:33:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 13565 transitions. [2022-01-18 17:33:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:02,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:02,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:02,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:02,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 17:33:02,323 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:02,324 INFO L85 PathProgramCache]: Analyzing trace with hash 246162663, now seen corresponding path program 19 times [2022-01-18 17:33:02,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:02,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582053918] [2022-01-18 17:33:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:02,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:02,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582053918] [2022-01-18 17:33:02,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582053918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:02,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863935921] [2022-01-18 17:33:02,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:02,373 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:02,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 17:33:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:02,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:02,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863935921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:02,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:02,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:33:02,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374157783] [2022-01-18 17:33:02,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:02,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:33:02,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:33:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:33:02,682 INFO L87 Difference]: Start difference. First operand 3868 states and 13565 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 17:33:07,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:07,732 INFO L93 Difference]: Finished difference Result 16600 states and 52297 transitions. [2022-01-18 17:33:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-01-18 17:33:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 30 [2022-01-18 17:33:07,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:07,766 INFO L225 Difference]: With dead ends: 16600 [2022-01-18 17:33:07,766 INFO L226 Difference]: Without dead ends: 16600 [2022-01-18 17:33:07,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33128 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12100, Invalid=60530, Unknown=0, NotChecked=0, Total=72630 [2022-01-18 17:33:07,769 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1105 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 2747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:07,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 748 Invalid, 2747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:33:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16600 states. [2022-01-18 17:33:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16600 to 4468. [2022-01-18 17:33:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4468 states, 4467 states have (on average 3.640250727557645) internal successors, (16261), 4467 states have internal predecessors, (16261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4468 states to 4468 states and 16261 transitions. [2022-01-18 17:33:07,939 INFO L78 Accepts]: Start accepts. Automaton has 4468 states and 16261 transitions. Word has length 30 [2022-01-18 17:33:07,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:07,939 INFO L470 AbstractCegarLoop]: Abstraction has 4468 states and 16261 transitions. [2022-01-18 17:33:07,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 17:33:07,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4468 states and 16261 transitions. [2022-01-18 17:33:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:07,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:07,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:07,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-18 17:33:08,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 17:33:08,151 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:08,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:08,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1683112665, now seen corresponding path program 20 times [2022-01-18 17:33:08,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:08,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499590035] [2022-01-18 17:33:08,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:08,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:08,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:08,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499590035] [2022-01-18 17:33:08,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499590035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:08,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693903705] [2022-01-18 17:33:08,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:08,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:08,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:08,211 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:08,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 17:33:08,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:08,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:08,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:08,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:08,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693903705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:08,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:08,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:33:08,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216610789] [2022-01-18 17:33:08,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:08,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:33:08,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:33:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:33:08,512 INFO L87 Difference]: Start difference. First operand 4468 states and 16261 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:12,962 INFO L93 Difference]: Finished difference Result 16854 states and 52503 transitions. [2022-01-18 17:33:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-01-18 17:33:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:13,034 INFO L225 Difference]: With dead ends: 16854 [2022-01-18 17:33:13,034 INFO L226 Difference]: Without dead ends: 16854 [2022-01-18 17:33:13,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27212 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10717, Invalid=49063, Unknown=0, NotChecked=0, Total=59780 [2022-01-18 17:33:13,037 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1209 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:13,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 766 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:33:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16854 states. [2022-01-18 17:33:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16854 to 4392. [2022-01-18 17:33:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4391 states have (on average 3.6178547028011843) internal successors, (15886), 4391 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 15886 transitions. [2022-01-18 17:33:13,182 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 15886 transitions. Word has length 30 [2022-01-18 17:33:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:13,182 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 15886 transitions. [2022-01-18 17:33:13,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:13,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 15886 transitions. [2022-01-18 17:33:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:13,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:13,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:13,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:13,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:13,390 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1395922129, now seen corresponding path program 21 times [2022-01-18 17:33:13,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:13,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327588781] [2022-01-18 17:33:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:13,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:13,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327588781] [2022-01-18 17:33:13,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327588781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383515375] [2022-01-18 17:33:13,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:33:13,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:13,446 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:13,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 17:33:13,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:33:13,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:13,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:13,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383515375] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:13,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:13,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:33:13,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304866784] [2022-01-18 17:33:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:13,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:13,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:13,726 INFO L87 Difference]: Start difference. First operand 4392 states and 15886 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:16,305 INFO L93 Difference]: Finished difference Result 12242 states and 38213 transitions. [2022-01-18 17:33:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-18 17:33:16,306 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:16,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:16,330 INFO L225 Difference]: With dead ends: 12242 [2022-01-18 17:33:16,331 INFO L226 Difference]: Without dead ends: 12242 [2022-01-18 17:33:16,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11117 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4782, Invalid=21300, Unknown=0, NotChecked=0, Total=26082 [2022-01-18 17:33:16,333 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 719 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:16,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 644 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12242 states. [2022-01-18 17:33:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12242 to 4346. [2022-01-18 17:33:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4346 states, 4345 states have (on average 3.614729574223245) internal successors, (15706), 4345 states have internal predecessors, (15706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4346 states to 4346 states and 15706 transitions. [2022-01-18 17:33:16,493 INFO L78 Accepts]: Start accepts. Automaton has 4346 states and 15706 transitions. Word has length 30 [2022-01-18 17:33:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:16,493 INFO L470 AbstractCegarLoop]: Abstraction has 4346 states and 15706 transitions. [2022-01-18 17:33:16,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4346 states and 15706 transitions. [2022-01-18 17:33:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:16,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:16,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:16,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:16,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 17:33:16,700 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:16,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash -616619543, now seen corresponding path program 22 times [2022-01-18 17:33:16,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:16,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632216773] [2022-01-18 17:33:16,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:16,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:16,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632216773] [2022-01-18 17:33:16,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632216773] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191460186] [2022-01-18 17:33:16,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:33:16,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:16,752 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:16,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 17:33:16,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:33:16,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:16,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:16,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:16,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:17,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191460186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:17,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:17,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:33:17,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147029353] [2022-01-18 17:33:17,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:17,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:17,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:17,015 INFO L87 Difference]: Start difference. First operand 4346 states and 15706 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 17:33:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:19,519 INFO L93 Difference]: Finished difference Result 11838 states and 37015 transitions. [2022-01-18 17:33:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-18 17:33:19,519 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 30 [2022-01-18 17:33:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:19,540 INFO L225 Difference]: With dead ends: 11838 [2022-01-18 17:33:19,540 INFO L226 Difference]: Without dead ends: 11838 [2022-01-18 17:33:19,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4362, Invalid=20444, Unknown=0, NotChecked=0, Total=24806 [2022-01-18 17:33:19,542 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 714 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:19,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 635 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11838 states. [2022-01-18 17:33:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11838 to 4362. [2022-01-18 17:33:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4361 states have (on average 3.60651226782848) internal successors, (15728), 4361 states have internal predecessors, (15728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:19,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 15728 transitions. [2022-01-18 17:33:19,653 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 15728 transitions. Word has length 30 [2022-01-18 17:33:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:19,653 INFO L470 AbstractCegarLoop]: Abstraction has 4362 states and 15728 transitions. [2022-01-18 17:33:19,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 17:33:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 15728 transitions. [2022-01-18 17:33:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:19,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:19,659 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:19,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:19,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 17:33:19,860 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash -278477675, now seen corresponding path program 23 times [2022-01-18 17:33:19,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210978754] [2022-01-18 17:33:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:19,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:19,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210978754] [2022-01-18 17:33:19,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210978754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799822740] [2022-01-18 17:33:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:33:19,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:19,917 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:19,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 17:33:19,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:33:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:20,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:20,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:20,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799822740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:20,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:20,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 17 [2022-01-18 17:33:20,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566750034] [2022-01-18 17:33:20,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:20,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:33:20,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:33:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:33:20,124 INFO L87 Difference]: Start difference. First operand 4362 states and 15728 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:21,315 INFO L93 Difference]: Finished difference Result 10713 states and 33937 transitions. [2022-01-18 17:33:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 17:33:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:21,336 INFO L225 Difference]: With dead ends: 10713 [2022-01-18 17:33:21,336 INFO L226 Difference]: Without dead ends: 10713 [2022-01-18 17:33:21,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3054 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1779, Invalid=6231, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:33:21,337 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 435 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:21,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 438 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:33:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10713 states. [2022-01-18 17:33:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10713 to 4397. [2022-01-18 17:33:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4397 states, 4396 states have (on average 3.6139672429481347) internal successors, (15887), 4396 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4397 states to 4397 states and 15887 transitions. [2022-01-18 17:33:21,459 INFO L78 Accepts]: Start accepts. Automaton has 4397 states and 15887 transitions. Word has length 30 [2022-01-18 17:33:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:21,459 INFO L470 AbstractCegarLoop]: Abstraction has 4397 states and 15887 transitions. [2022-01-18 17:33:21,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4397 states and 15887 transitions. [2022-01-18 17:33:21,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:21,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:21,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:21,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:21,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:21,667 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash 253428639, now seen corresponding path program 24 times [2022-01-18 17:33:21,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:21,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463943948] [2022-01-18 17:33:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:21,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:21,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463943948] [2022-01-18 17:33:21,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463943948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769706803] [2022-01-18 17:33:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:33:21,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:21,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:21,732 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:21,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 17:33:21,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:33:21,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:33:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:21,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:33:21,946 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:33:21,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:33:22,071 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:33:22,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:33:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:33:22,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:22,314 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:33:22,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:33:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:33:22,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769706803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:22,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:22,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-01-18 17:33:22,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110084313] [2022-01-18 17:33:22,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:22,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:33:22,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:33:22,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:33:22,443 INFO L87 Difference]: Start difference. First operand 4397 states and 15887 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:27,409 INFO L93 Difference]: Finished difference Result 10822 states and 34699 transitions. [2022-01-18 17:33:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-01-18 17:33:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:27,430 INFO L225 Difference]: With dead ends: 10822 [2022-01-18 17:33:27,430 INFO L226 Difference]: Without dead ends: 10443 [2022-01-18 17:33:27,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21050 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5773, Invalid=45529, Unknown=0, NotChecked=0, Total=51302 [2022-01-18 17:33:27,435 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 719 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 3388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:27,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1175 Invalid, 3388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2471 Invalid, 0 Unknown, 770 Unchecked, 1.0s Time] [2022-01-18 17:33:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10443 states. [2022-01-18 17:33:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10443 to 4539. [2022-01-18 17:33:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.626707800793301) internal successors, (16458), 4538 states have internal predecessors, (16458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 16458 transitions. [2022-01-18 17:33:27,566 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 16458 transitions. Word has length 30 [2022-01-18 17:33:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:27,566 INFO L470 AbstractCegarLoop]: Abstraction has 4539 states and 16458 transitions. [2022-01-18 17:33:27,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 16458 transitions. [2022-01-18 17:33:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:27,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:27,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:27,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:27,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 17:33:27,774 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash -26538439, now seen corresponding path program 25 times [2022-01-18 17:33:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482478463] [2022-01-18 17:33:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:27,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:27,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482478463] [2022-01-18 17:33:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482478463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779272047] [2022-01-18 17:33:27,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:27,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:27,821 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:27,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 17:33:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:27,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:27,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:28,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779272047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:28,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:28,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 17:33:28,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353386744] [2022-01-18 17:33:28,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:28,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:33:28,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:28,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:33:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:33:28,068 INFO L87 Difference]: Start difference. First operand 4539 states and 16458 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 17:33:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:30,013 INFO L93 Difference]: Finished difference Result 11273 states and 35289 transitions. [2022-01-18 17:33:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 17:33:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 30 [2022-01-18 17:33:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:30,035 INFO L225 Difference]: With dead ends: 11273 [2022-01-18 17:33:30,035 INFO L226 Difference]: Without dead ends: 11273 [2022-01-18 17:33:30,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3292, Invalid=14264, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 17:33:30,036 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 583 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:30,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 566 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:33:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2022-01-18 17:33:30,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 4555. [2022-01-18 17:33:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 3.6280193236714977) internal successors, (16522), 4554 states have internal predecessors, (16522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 16522 transitions. [2022-01-18 17:33:30,176 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 16522 transitions. Word has length 30 [2022-01-18 17:33:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 16522 transitions. [2022-01-18 17:33:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 17:33:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 16522 transitions. [2022-01-18 17:33:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:30,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:30,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:30,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 17:33:30,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:30,383 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash 832947317, now seen corresponding path program 26 times [2022-01-18 17:33:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:30,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977293596] [2022-01-18 17:33:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:30,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:30,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977293596] [2022-01-18 17:33:30,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977293596] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104698442] [2022-01-18 17:33:30,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:30,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:30,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:30,485 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:30,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 17:33:30,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:30,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:30,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:30,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104698442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:30,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:30,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:33:30,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979509005] [2022-01-18 17:33:30,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:30,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:30,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:30,767 INFO L87 Difference]: Start difference. First operand 4555 states and 16522 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:33,676 INFO L93 Difference]: Finished difference Result 12074 states and 37513 transitions. [2022-01-18 17:33:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-01-18 17:33:33,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 30 [2022-01-18 17:33:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:33,698 INFO L225 Difference]: With dead ends: 12074 [2022-01-18 17:33:33,698 INFO L226 Difference]: Without dead ends: 12074 [2022-01-18 17:33:33,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15940 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5934, Invalid=30356, Unknown=0, NotChecked=0, Total=36290 [2022-01-18 17:33:33,702 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 710 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:33,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 660 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12074 states. [2022-01-18 17:33:33,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12074 to 4635. [2022-01-18 17:33:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 3.622356495468278) internal successors, (16786), 4634 states have internal predecessors, (16786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 16786 transitions. [2022-01-18 17:33:33,842 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 16786 transitions. Word has length 30 [2022-01-18 17:33:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:33,842 INFO L470 AbstractCegarLoop]: Abstraction has 4635 states and 16786 transitions. [2022-01-18 17:33:33,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 16786 transitions. [2022-01-18 17:33:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:33,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:33,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:33,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:34,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 17:33:34,049 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:34,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1958548217, now seen corresponding path program 27 times [2022-01-18 17:33:34,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:34,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713440335] [2022-01-18 17:33:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:34,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:34,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:34,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713440335] [2022-01-18 17:33:34,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713440335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:34,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923091050] [2022-01-18 17:33:34,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:33:34,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:34,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:34,096 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:34,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 17:33:34,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-18 17:33:34,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:34,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:34,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923091050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:34,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:34,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:33:34,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580486861] [2022-01-18 17:33:34,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:34,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:34,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:34,353 INFO L87 Difference]: Start difference. First operand 4635 states and 16786 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:36,587 INFO L93 Difference]: Finished difference Result 11138 states and 35112 transitions. [2022-01-18 17:33:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-18 17:33:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 30 [2022-01-18 17:33:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:36,609 INFO L225 Difference]: With dead ends: 11138 [2022-01-18 17:33:36,609 INFO L226 Difference]: Without dead ends: 11130 [2022-01-18 17:33:36,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9403 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4289, Invalid=18361, Unknown=0, NotChecked=0, Total=22650 [2022-01-18 17:33:36,612 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 622 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:36,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 606 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:33:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11130 states. [2022-01-18 17:33:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11130 to 4567. [2022-01-18 17:33:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4567 states, 4566 states have (on average 3.6151992991677617) internal successors, (16507), 4566 states have internal predecessors, (16507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4567 states to 4567 states and 16507 transitions. [2022-01-18 17:33:36,739 INFO L78 Accepts]: Start accepts. Automaton has 4567 states and 16507 transitions. Word has length 30 [2022-01-18 17:33:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 4567 states and 16507 transitions. [2022-01-18 17:33:36,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:36,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4567 states and 16507 transitions. [2022-01-18 17:33:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:36,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:36,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:36,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:36,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 17:33:36,984 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash -713124495, now seen corresponding path program 28 times [2022-01-18 17:33:36,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:36,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679757109] [2022-01-18 17:33:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:36,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:37,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679757109] [2022-01-18 17:33:37,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679757109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79424573] [2022-01-18 17:33:37,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:33:37,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:37,019 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:37,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 17:33:37,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:33:37,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:37,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:37,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:37,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79424573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:37,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:37,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:33:37,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207849689] [2022-01-18 17:33:37,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:37,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:37,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:37,301 INFO L87 Difference]: Start difference. First operand 4567 states and 16507 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:39,333 INFO L93 Difference]: Finished difference Result 12349 states and 38953 transitions. [2022-01-18 17:33:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-18 17:33:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 30 [2022-01-18 17:33:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:39,358 INFO L225 Difference]: With dead ends: 12349 [2022-01-18 17:33:39,358 INFO L226 Difference]: Without dead ends: 12349 [2022-01-18 17:33:39,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8011 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4044, Invalid=15138, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 17:33:39,360 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 768 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:39,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 519 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:33:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12349 states. [2022-01-18 17:33:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12349 to 4699. [2022-01-18 17:33:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 3.62281822051937) internal successors, (17020), 4698 states have internal predecessors, (17020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 17020 transitions. [2022-01-18 17:33:39,520 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 17020 transitions. Word has length 30 [2022-01-18 17:33:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:39,520 INFO L470 AbstractCegarLoop]: Abstraction has 4699 states and 17020 transitions. [2022-01-18 17:33:39,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 17020 transitions. [2022-01-18 17:33:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:39,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:39,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:39,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-18 17:33:39,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:39,737 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash 412476405, now seen corresponding path program 29 times [2022-01-18 17:33:39,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:39,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214484947] [2022-01-18 17:33:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:39,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:39,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214484947] [2022-01-18 17:33:39,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214484947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863848923] [2022-01-18 17:33:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:33:39,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:39,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:39,792 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:39,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 17:33:39,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 17:33:39,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:39,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:39,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:39,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:40,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863848923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:40,047 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:40,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:33:40,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438340385] [2022-01-18 17:33:40,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:40,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:40,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:40,048 INFO L87 Difference]: Start difference. First operand 4699 states and 17020 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:42,475 INFO L93 Difference]: Finished difference Result 12269 states and 38987 transitions. [2022-01-18 17:33:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-18 17:33:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 30 [2022-01-18 17:33:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:42,497 INFO L225 Difference]: With dead ends: 12269 [2022-01-18 17:33:42,497 INFO L226 Difference]: Without dead ends: 12257 [2022-01-18 17:33:42,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4896, Invalid=19284, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 17:33:42,499 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 713 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:42,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 516 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12257 states. [2022-01-18 17:33:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12257 to 4581. [2022-01-18 17:33:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4581 states, 4580 states have (on average 3.622052401746725) internal successors, (16589), 4580 states have internal predecessors, (16589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4581 states to 4581 states and 16589 transitions. [2022-01-18 17:33:42,626 INFO L78 Accepts]: Start accepts. Automaton has 4581 states and 16589 transitions. Word has length 30 [2022-01-18 17:33:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:42,626 INFO L470 AbstractCegarLoop]: Abstraction has 4581 states and 16589 transitions. [2022-01-18 17:33:42,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4581 states and 16589 transitions. [2022-01-18 17:33:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:42,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:42,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:42,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:42,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:42,833 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -917258635, now seen corresponding path program 30 times [2022-01-18 17:33:42,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:42,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509592659] [2022-01-18 17:33:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:42,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:42,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:42,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509592659] [2022-01-18 17:33:42,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509592659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:42,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012404042] [2022-01-18 17:33:42,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:33:42,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:42,928 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:42,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 17:33:42,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:33:42,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:43,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012404042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:43,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:43,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:33:43,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584668862] [2022-01-18 17:33:43,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:43,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:43,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:43,230 INFO L87 Difference]: Start difference. First operand 4581 states and 16589 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 17:33:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:45,391 INFO L93 Difference]: Finished difference Result 13308 states and 42483 transitions. [2022-01-18 17:33:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 17:33:45,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 30 [2022-01-18 17:33:45,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:45,417 INFO L225 Difference]: With dead ends: 13308 [2022-01-18 17:33:45,417 INFO L226 Difference]: Without dead ends: 13308 [2022-01-18 17:33:45,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10097 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4756, Invalid=18500, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 17:33:45,419 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 927 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:45,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 513 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:33:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13308 states. [2022-01-18 17:33:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13308 to 4586. [2022-01-18 17:33:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 3.6272628135223557) internal successors, (16631), 4585 states have internal predecessors, (16631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 16631 transitions. [2022-01-18 17:33:45,567 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 16631 transitions. Word has length 30 [2022-01-18 17:33:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:45,567 INFO L470 AbstractCegarLoop]: Abstraction has 4586 states and 16631 transitions. [2022-01-18 17:33:45,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 17:33:45,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 16631 transitions. [2022-01-18 17:33:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:45,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:45,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:45,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:45,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:45,789 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:45,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1035516469, now seen corresponding path program 31 times [2022-01-18 17:33:45,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:45,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113028107] [2022-01-18 17:33:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:45,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:45,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113028107] [2022-01-18 17:33:45,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113028107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:45,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087675564] [2022-01-18 17:33:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:45,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:45,823 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:45,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 17:33:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:45,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:45,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:45,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:46,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087675564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:46,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:46,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2022-01-18 17:33:46,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341691512] [2022-01-18 17:33:46,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:46,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:33:46,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:33:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:33:46,099 INFO L87 Difference]: Start difference. First operand 4586 states and 16631 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:48,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:48,883 INFO L93 Difference]: Finished difference Result 14837 states and 46985 transitions. [2022-01-18 17:33:48,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-01-18 17:33:48,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 30 [2022-01-18 17:33:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:48,912 INFO L225 Difference]: With dead ends: 14837 [2022-01-18 17:33:48,913 INFO L226 Difference]: Without dead ends: 14837 [2022-01-18 17:33:48,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14666 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6595, Invalid=26347, Unknown=0, NotChecked=0, Total=32942 [2022-01-18 17:33:48,916 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 856 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:48,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 509 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:33:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2022-01-18 17:33:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 4565. [2022-01-18 17:33:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.618755477651183) internal successors, (16516), 4564 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16516 transitions. [2022-01-18 17:33:49,092 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16516 transitions. Word has length 30 [2022-01-18 17:33:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:49,092 INFO L470 AbstractCegarLoop]: Abstraction has 4565 states and 16516 transitions. [2022-01-18 17:33:49,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:33:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16516 transitions. [2022-01-18 17:33:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:49,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:49,099 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:49,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:49,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 17:33:49,299 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash -863850567, now seen corresponding path program 32 times [2022-01-18 17:33:49,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:49,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769665852] [2022-01-18 17:33:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:49,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:49,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769665852] [2022-01-18 17:33:49,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769665852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:49,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607162598] [2022-01-18 17:33:49,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:49,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:49,351 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:49,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 17:33:49,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:49,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:49,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:49,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:49,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607162598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:49,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:49,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 17:33:49,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830066421] [2022-01-18 17:33:49,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:49,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:33:49,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:33:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:33:49,579 INFO L87 Difference]: Start difference. First operand 4565 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 17:33:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:51,066 INFO L93 Difference]: Finished difference Result 12793 states and 40356 transitions. [2022-01-18 17:33:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 17:33:51,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 30 [2022-01-18 17:33:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:51,092 INFO L225 Difference]: With dead ends: 12793 [2022-01-18 17:33:51,092 INFO L226 Difference]: Without dead ends: 12785 [2022-01-18 17:33:51,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4715 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2810, Invalid=9180, Unknown=0, NotChecked=0, Total=11990 [2022-01-18 17:33:51,094 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 690 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:51,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 375 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:33:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12785 states. [2022-01-18 17:33:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12785 to 4571. [2022-01-18 17:33:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 3.6185995623632383) internal successors, (16537), 4570 states have internal predecessors, (16537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 16537 transitions. [2022-01-18 17:33:51,270 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 16537 transitions. Word has length 30 [2022-01-18 17:33:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:51,270 INFO L470 AbstractCegarLoop]: Abstraction has 4571 states and 16537 transitions. [2022-01-18 17:33:51,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 17:33:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 16537 transitions. [2022-01-18 17:33:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:51,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:51,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:51,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 17:33:51,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 17:33:51,477 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:51,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash -593340875, now seen corresponding path program 33 times [2022-01-18 17:33:51,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882954215] [2022-01-18 17:33:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:51,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:51,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882954215] [2022-01-18 17:33:51,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882954215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024395694] [2022-01-18 17:33:51,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:33:51,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:51,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:51,522 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:51,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 17:33:51,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 17:33:51,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:33:51,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:51,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:51,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024395694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:51,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:51,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-01-18 17:33:51,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527148111] [2022-01-18 17:33:51,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:51,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:33:51,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:51,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:33:51,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:33:51,792 INFO L87 Difference]: Start difference. First operand 4571 states and 16537 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 17:33:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:53,432 INFO L93 Difference]: Finished difference Result 13274 states and 41550 transitions. [2022-01-18 17:33:53,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 17:33:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 30 [2022-01-18 17:33:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:53,459 INFO L225 Difference]: With dead ends: 13274 [2022-01-18 17:33:53,459 INFO L226 Difference]: Without dead ends: 13274 [2022-01-18 17:33:53,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3140, Invalid=10666, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 17:33:53,461 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 683 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:53,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 552 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:33:53,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13274 states. [2022-01-18 17:33:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13274 to 4399. [2022-01-18 17:33:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 3.575943610732151) internal successors, (15727), 4398 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 15727 transitions. [2022-01-18 17:33:53,624 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 15727 transitions. Word has length 30 [2022-01-18 17:33:53,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:53,624 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 15727 transitions. [2022-01-18 17:33:53,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 17:33:53,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 15727 transitions. [2022-01-18 17:33:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:53,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:53,630 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] [2022-01-18 17:33:53,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 17:33:53,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:53,831 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash -789534161, now seen corresponding path program 34 times [2022-01-18 17:33:53,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437304094] [2022-01-18 17:33:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:53,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:33:53,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:53,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437304094] [2022-01-18 17:33:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437304094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:53,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230739605] [2022-01-18 17:33:53,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:33:53,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:53,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:53,898 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:53,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 17:33:53,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:33:53,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:33:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:33:54,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:33:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230739605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:54,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8] total 13 [2022-01-18 17:33:54,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782444092] [2022-01-18 17:33:54,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:54,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:33:54,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:54,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:33:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:33:54,118 INFO L87 Difference]: Start difference. First operand 4399 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:54,398 INFO L93 Difference]: Finished difference Result 6449 states and 21322 transitions. [2022-01-18 17:33:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:33:54,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:54,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:54,410 INFO L225 Difference]: With dead ends: 6449 [2022-01-18 17:33:54,410 INFO L226 Difference]: Without dead ends: 6449 [2022-01-18 17:33:54,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2022-01-18 17:33:54,410 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 302 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:54,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 84 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:33:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2022-01-18 17:33:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 4316. [2022-01-18 17:33:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 3.5606025492468136) internal successors, (15364), 4315 states have internal predecessors, (15364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 15364 transitions. [2022-01-18 17:33:54,484 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 15364 transitions. Word has length 30 [2022-01-18 17:33:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:54,484 INFO L470 AbstractCegarLoop]: Abstraction has 4316 states and 15364 transitions. [2022-01-18 17:33:54,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 15364 transitions. [2022-01-18 17:33:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:54,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:54,490 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] [2022-01-18 17:33:54,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-18 17:33:54,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:54,690 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:54,691 INFO L85 PathProgramCache]: Analyzing trace with hash -530738837, now seen corresponding path program 35 times [2022-01-18 17:33:54,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:54,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205062113] [2022-01-18 17:33:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:54,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:33:54,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205062113] [2022-01-18 17:33:54,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205062113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317358516] [2022-01-18 17:33:54,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:33:54,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:54,729 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:54,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 17:33:54,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:33:54,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:54,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:33:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:54,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:54,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317358516] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:54,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:54,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2022-01-18 17:33:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264155699] [2022-01-18 17:33:54,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:54,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:33:54,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:33:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:33:54,933 INFO L87 Difference]: Start difference. First operand 4316 states and 15364 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 17:33:56,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:56,838 INFO L93 Difference]: Finished difference Result 9281 states and 29662 transitions. [2022-01-18 17:33:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 17:33:56,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 30 [2022-01-18 17:33:56,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:56,855 INFO L225 Difference]: With dead ends: 9281 [2022-01-18 17:33:56,855 INFO L226 Difference]: Without dead ends: 9227 [2022-01-18 17:33:56,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4351 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2944, Invalid=8612, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 17:33:56,855 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 551 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:56,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 353 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:33:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2022-01-18 17:33:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 4444. [2022-01-18 17:33:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.5941931127616473) internal successors, (15969), 4443 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 15969 transitions. [2022-01-18 17:33:56,945 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 15969 transitions. Word has length 30 [2022-01-18 17:33:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:56,946 INFO L470 AbstractCegarLoop]: Abstraction has 4444 states and 15969 transitions. [2022-01-18 17:33:56,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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 17:33:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 15969 transitions. [2022-01-18 17:33:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:56,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:56,952 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:33:56,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 17:33:57,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:57,155 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:33:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash 379456291, now seen corresponding path program 36 times [2022-01-18 17:33:57,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:57,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933064799] [2022-01-18 17:33:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:57,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:57,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:57,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933064799] [2022-01-18 17:33:57,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933064799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:57,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215698224] [2022-01-18 17:33:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:33:57,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:57,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:57,211 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:33:57,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 17:33:57,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:33:57,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:57,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-18 17:33:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:57,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:33:57,469 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:33:57,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:33:57,533 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:33:57,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:33:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:33:57,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:58,033 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:33:58,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:33:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:33:58,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215698224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:58,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:58,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-01-18 17:33:58,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645570967] [2022-01-18 17:33:58,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:58,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:33:58,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:58,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:33:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:33:58,358 INFO L87 Difference]: Start difference. First operand 4444 states and 15969 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:07,524 INFO L93 Difference]: Finished difference Result 14335 states and 45796 transitions. [2022-01-18 17:34:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-01-18 17:34:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:07,551 INFO L225 Difference]: With dead ends: 14335 [2022-01-18 17:34:07,551 INFO L226 Difference]: Without dead ends: 13974 [2022-01-18 17:34:07,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27978 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=7316, Invalid=60024, Unknown=0, NotChecked=0, Total=67340 [2022-01-18 17:34:07,553 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1151 mSDsluCounter, 2735 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1764 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:07,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1573 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3142 Invalid, 0 Unknown, 1764 Unchecked, 1.4s Time] [2022-01-18 17:34:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13974 states. [2022-01-18 17:34:07,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13974 to 5310. [2022-01-18 17:34:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5310 states, 5309 states have (on average 3.643435675268412) internal successors, (19343), 5309 states have internal predecessors, (19343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 19343 transitions. [2022-01-18 17:34:07,701 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 19343 transitions. Word has length 30 [2022-01-18 17:34:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:07,702 INFO L470 AbstractCegarLoop]: Abstraction has 5310 states and 19343 transitions. [2022-01-18 17:34:07,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 19343 transitions. [2022-01-18 17:34:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:07,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:07,710 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] [2022-01-18 17:34:07,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:07,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:07,910 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash 733452651, now seen corresponding path program 37 times [2022-01-18 17:34:07,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:07,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078903717] [2022-01-18 17:34:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:07,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:07,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:07,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078903717] [2022-01-18 17:34:07,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078903717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:07,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079981068] [2022-01-18 17:34:07,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:07,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:07,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:07,953 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:07,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 17:34:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:07,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:34:07,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:08,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:08,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079981068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:08,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:08,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 17:34:08,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088076614] [2022-01-18 17:34:08,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:08,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:34:08,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:34:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:34:08,213 INFO L87 Difference]: Start difference. First operand 5310 states and 19343 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) 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 17:34:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:08,417 INFO L93 Difference]: Finished difference Result 7739 states and 26954 transitions. [2022-01-18 17:34:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 17:34:08,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) 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 30 [2022-01-18 17:34:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:08,431 INFO L225 Difference]: With dead ends: 7739 [2022-01-18 17:34:08,432 INFO L226 Difference]: Without dead ends: 7413 [2022-01-18 17:34:08,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:34:08,432 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 266 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:08,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 64 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:34:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-01-18 17:34:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 5670. [2022-01-18 17:34:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5670 states, 5669 states have (on average 3.7110601517022404) internal successors, (21038), 5669 states have internal predecessors, (21038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:08,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5670 states to 5670 states and 21038 transitions. [2022-01-18 17:34:08,533 INFO L78 Accepts]: Start accepts. Automaton has 5670 states and 21038 transitions. Word has length 30 [2022-01-18 17:34:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:08,533 INFO L470 AbstractCegarLoop]: Abstraction has 5670 states and 21038 transitions. [2022-01-18 17:34:08,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) 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 17:34:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5670 states and 21038 transitions. [2022-01-18 17:34:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:08,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:08,542 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] [2022-01-18 17:34:08,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:08,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 17:34:08,743 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -556252441, now seen corresponding path program 38 times [2022-01-18 17:34:08,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:08,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351442060] [2022-01-18 17:34:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:08,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:08,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:08,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351442060] [2022-01-18 17:34:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351442060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:08,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545736160] [2022-01-18 17:34:08,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:08,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:08,787 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:08,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 17:34:08,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:08,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:34:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:34:09,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545736160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:09,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:09,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 17 [2022-01-18 17:34:09,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265654668] [2022-01-18 17:34:09,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:09,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:34:09,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:09,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:34:09,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:34:09,023 INFO L87 Difference]: Start difference. First operand 5670 states and 21038 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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 17:34:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:09,926 INFO L93 Difference]: Finished difference Result 9916 states and 33870 transitions. [2022-01-18 17:34:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:34:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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 30 [2022-01-18 17:34:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:09,945 INFO L225 Difference]: With dead ends: 9916 [2022-01-18 17:34:09,945 INFO L226 Difference]: Without dead ends: 9842 [2022-01-18 17:34:09,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1212, Invalid=3210, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:34:09,946 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 356 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:09,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 261 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:34:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9842 states. [2022-01-18 17:34:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9842 to 6192. [2022-01-18 17:34:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6192 states, 6191 states have (on average 3.7491519948312066) internal successors, (23211), 6191 states have internal predecessors, (23211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6192 states to 6192 states and 23211 transitions. [2022-01-18 17:34:10,081 INFO L78 Accepts]: Start accepts. Automaton has 6192 states and 23211 transitions. Word has length 30 [2022-01-18 17:34:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:10,081 INFO L470 AbstractCegarLoop]: Abstraction has 6192 states and 23211 transitions. [2022-01-18 17:34:10,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 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 17:34:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6192 states and 23211 transitions. [2022-01-18 17:34:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:10,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:10,091 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] [2022-01-18 17:34:10,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 17:34:10,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:10,292 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1934026897, now seen corresponding path program 39 times [2022-01-18 17:34:10,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:10,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415882273] [2022-01-18 17:34:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:10,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:10,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415882273] [2022-01-18 17:34:10,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415882273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724536087] [2022-01-18 17:34:10,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:10,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:10,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:10,334 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:10,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 17:34:10,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:34:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:10,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 17:34:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:10,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:34:10,581 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:34:10,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:34:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:34:10,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:10,763 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:34:10,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:34:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:34:10,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724536087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:10,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:10,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-01-18 17:34:10,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170598300] [2022-01-18 17:34:10,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:10,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:34:10,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:34:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:34:10,911 INFO L87 Difference]: Start difference. First operand 6192 states and 23211 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 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 17:34:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:12,297 INFO L93 Difference]: Finished difference Result 14134 states and 49084 transitions. [2022-01-18 17:34:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 17:34:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 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 30 [2022-01-18 17:34:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:12,325 INFO L225 Difference]: With dead ends: 14134 [2022-01-18 17:34:12,325 INFO L226 Difference]: Without dead ends: 13763 [2022-01-18 17:34:12,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=924, Invalid=5082, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:34:12,326 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 353 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 981 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:12,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 801 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1225 Invalid, 0 Unknown, 981 Unchecked, 0.5s Time] [2022-01-18 17:34:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2022-01-18 17:34:12,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 8244. [2022-01-18 17:34:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8244 states, 8243 states have (on average 3.843018318573335) internal successors, (31678), 8243 states have internal predecessors, (31678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8244 states to 8244 states and 31678 transitions. [2022-01-18 17:34:12,503 INFO L78 Accepts]: Start accepts. Automaton has 8244 states and 31678 transitions. Word has length 30 [2022-01-18 17:34:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:12,504 INFO L470 AbstractCegarLoop]: Abstraction has 8244 states and 31678 transitions. [2022-01-18 17:34:12,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 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 17:34:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 8244 states and 31678 transitions. [2022-01-18 17:34:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:12,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:12,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:12,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-01-18 17:34:12,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 17:34:12,718 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash 109854575, now seen corresponding path program 40 times [2022-01-18 17:34:12,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:12,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724943688] [2022-01-18 17:34:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:12,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:12,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724943688] [2022-01-18 17:34:12,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724943688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:12,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837009711] [2022-01-18 17:34:12,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:12,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:12,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:12,798 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:12,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 17:34:12,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:12,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:12,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:12,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:12,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837009711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:12,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:12,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:34:12,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090582974] [2022-01-18 17:34:12,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:12,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:34:12,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:12,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:34:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:34:12,990 INFO L87 Difference]: Start difference. First operand 8244 states and 31678 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:13,916 INFO L93 Difference]: Finished difference Result 15792 states and 55324 transitions. [2022-01-18 17:34:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 17:34:13,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:13,951 INFO L225 Difference]: With dead ends: 15792 [2022-01-18 17:34:13,951 INFO L226 Difference]: Without dead ends: 15792 [2022-01-18 17:34:13,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1285, Invalid=4117, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:34:13,952 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 448 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:13,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 391 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:34:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15792 states. [2022-01-18 17:34:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15792 to 8160. [2022-01-18 17:34:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 8159 states have (on average 3.8534134085059444) internal successors, (31440), 8159 states have internal predecessors, (31440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 31440 transitions. [2022-01-18 17:34:14,232 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 31440 transitions. Word has length 30 [2022-01-18 17:34:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:14,233 INFO L470 AbstractCegarLoop]: Abstraction has 8160 states and 31440 transitions. [2022-01-18 17:34:14,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 31440 transitions. [2022-01-18 17:34:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:14,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:14,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:14,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:14,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 17:34:14,447 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1583886883, now seen corresponding path program 41 times [2022-01-18 17:34:14,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:14,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340119684] [2022-01-18 17:34:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:14,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:14,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340119684] [2022-01-18 17:34:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340119684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:14,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415261597] [2022-01-18 17:34:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:34:14,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:14,526 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:14,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 17:34:14,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:34:14,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:14,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:14,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:14,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415261597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:14,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:14,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:34:14,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244255501] [2022-01-18 17:34:14,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:14,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:34:14,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:34:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:34:14,804 INFO L87 Difference]: Start difference. First operand 8160 states and 31440 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 17:34:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:17,191 INFO L93 Difference]: Finished difference Result 16864 states and 57485 transitions. [2022-01-18 17:34:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 17:34:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 30 [2022-01-18 17:34:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:17,228 INFO L225 Difference]: With dead ends: 16864 [2022-01-18 17:34:17,228 INFO L226 Difference]: Without dead ends: 16864 [2022-01-18 17:34:17,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9186 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3892, Invalid=18458, Unknown=0, NotChecked=0, Total=22350 [2022-01-18 17:34:17,231 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 582 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:17,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 787 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:34:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16864 states. [2022-01-18 17:34:17,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16864 to 8404. [2022-01-18 17:34:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8404 states, 8403 states have (on average 3.835534928001904) internal successors, (32230), 8403 states have internal predecessors, (32230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8404 states to 8404 states and 32230 transitions. [2022-01-18 17:34:17,488 INFO L78 Accepts]: Start accepts. Automaton has 8404 states and 32230 transitions. Word has length 30 [2022-01-18 17:34:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:17,488 INFO L470 AbstractCegarLoop]: Abstraction has 8404 states and 32230 transitions. [2022-01-18 17:34:17,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 17:34:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 8404 states and 32230 transitions. [2022-01-18 17:34:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:17,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:17,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:17,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 17:34:17,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 17:34:17,702 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:17,703 INFO L85 PathProgramCache]: Analyzing trace with hash 528509489, now seen corresponding path program 42 times [2022-01-18 17:34:17,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:17,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893433868] [2022-01-18 17:34:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:17,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:17,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:17,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893433868] [2022-01-18 17:34:17,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893433868] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:17,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817876426] [2022-01-18 17:34:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:34:17,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:17,760 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:17,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 17:34:17,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:34:17,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:17,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:18,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817876426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:18,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:18,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-18 17:34:18,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127448916] [2022-01-18 17:34:18,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:18,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:34:18,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:18,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:34:18,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:34:18,068 INFO L87 Difference]: Start difference. First operand 8404 states and 32230 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 17:34:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:19,737 INFO L93 Difference]: Finished difference Result 15651 states and 54475 transitions. [2022-01-18 17:34:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-18 17:34:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 30 [2022-01-18 17:34:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:19,773 INFO L225 Difference]: With dead ends: 15651 [2022-01-18 17:34:19,773 INFO L226 Difference]: Without dead ends: 15643 [2022-01-18 17:34:19,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5719 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2883, Invalid=11879, Unknown=0, NotChecked=0, Total=14762 [2022-01-18 17:34:19,775 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 603 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:19,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 479 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15643 states. [2022-01-18 17:34:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15643 to 8342. [2022-01-18 17:34:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8342 states, 8341 states have (on average 3.8394676897254527) internal successors, (32025), 8341 states have internal predecessors, (32025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8342 states to 8342 states and 32025 transitions. [2022-01-18 17:34:20,031 INFO L78 Accepts]: Start accepts. Automaton has 8342 states and 32025 transitions. Word has length 30 [2022-01-18 17:34:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:20,031 INFO L470 AbstractCegarLoop]: Abstraction has 8342 states and 32025 transitions. [2022-01-18 17:34:20,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 17:34:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8342 states and 32025 transitions. [2022-01-18 17:34:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:20,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:20,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:20,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-18 17:34:20,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 17:34:20,245 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644427, now seen corresponding path program 43 times [2022-01-18 17:34:20,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:20,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524453504] [2022-01-18 17:34:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:20,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:20,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:20,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524453504] [2022-01-18 17:34:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524453504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:20,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910694255] [2022-01-18 17:34:20,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:20,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:20,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:20,328 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:20,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 17:34:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:20,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:20,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:20,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910694255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:20,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:20,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 17:34:20,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132811381] [2022-01-18 17:34:20,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:20,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:34:20,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:34:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:34:20,565 INFO L87 Difference]: Start difference. First operand 8342 states and 32025 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 17:34:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:22,228 INFO L93 Difference]: Finished difference Result 15609 states and 54374 transitions. [2022-01-18 17:34:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-18 17:34:22,229 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 30 [2022-01-18 17:34:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:22,264 INFO L225 Difference]: With dead ends: 15609 [2022-01-18 17:34:22,264 INFO L226 Difference]: Without dead ends: 15585 [2022-01-18 17:34:22,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5313 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2694, Invalid=11112, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 17:34:22,266 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 526 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:22,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 555 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15585 states. [2022-01-18 17:34:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15585 to 8434. [2022-01-18 17:34:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8434 states, 8433 states have (on average 3.831495316020396) internal successors, (32311), 8433 states have internal predecessors, (32311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8434 states to 8434 states and 32311 transitions. [2022-01-18 17:34:22,526 INFO L78 Accepts]: Start accepts. Automaton has 8434 states and 32311 transitions. Word has length 30 [2022-01-18 17:34:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:22,526 INFO L470 AbstractCegarLoop]: Abstraction has 8434 states and 32311 transitions. [2022-01-18 17:34:22,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 17:34:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 8434 states and 32311 transitions. [2022-01-18 17:34:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:22,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:22,539 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:22,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-01-18 17:34:22,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:22,740 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1914992093, now seen corresponding path program 44 times [2022-01-18 17:34:22,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:22,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065243673] [2022-01-18 17:34:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:22,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:22,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065243673] [2022-01-18 17:34:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065243673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297066127] [2022-01-18 17:34:22,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:22,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:22,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:22,784 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:22,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 17:34:22,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:22,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:23,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297066127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:23,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:23,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 17:34:23,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252201859] [2022-01-18 17:34:23,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:23,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:34:23,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:34:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:34:23,044 INFO L87 Difference]: Start difference. First operand 8434 states and 32311 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:34:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:25,422 INFO L93 Difference]: Finished difference Result 20916 states and 72438 transitions. [2022-01-18 17:34:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 17:34:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 30 [2022-01-18 17:34:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:25,471 INFO L225 Difference]: With dead ends: 20916 [2022-01-18 17:34:25,471 INFO L226 Difference]: Without dead ends: 20916 [2022-01-18 17:34:25,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9937 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4752, Invalid=19428, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 17:34:25,474 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 766 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:25,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 615 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:34:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20916 states. [2022-01-18 17:34:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20916 to 10611. [2022-01-18 17:34:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10611 states, 10610 states have (on average 3.853722902921772) internal successors, (40888), 10610 states have internal predecessors, (40888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10611 states to 10611 states and 40888 transitions. [2022-01-18 17:34:25,873 INFO L78 Accepts]: Start accepts. Automaton has 10611 states and 40888 transitions. Word has length 30 [2022-01-18 17:34:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:25,873 INFO L470 AbstractCegarLoop]: Abstraction has 10611 states and 40888 transitions. [2022-01-18 17:34:25,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:34:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 10611 states and 40888 transitions. [2022-01-18 17:34:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:25,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:25,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:25,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:26,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:26,091 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1324597809, now seen corresponding path program 45 times [2022-01-18 17:34:26,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200280128] [2022-01-18 17:34:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:26,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:26,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200280128] [2022-01-18 17:34:26,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200280128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885237905] [2022-01-18 17:34:26,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:26,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:26,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:26,135 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:26,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 17:34:26,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:34:26,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:26,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:26,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:26,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:26,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885237905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:26,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:26,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 17:34:26,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184691424] [2022-01-18 17:34:26,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:26,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:34:26,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:34:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:34:26,389 INFO L87 Difference]: Start difference. First operand 10611 states and 40888 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:34:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:29,045 INFO L93 Difference]: Finished difference Result 21405 states and 74782 transitions. [2022-01-18 17:34:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 17:34:29,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 30 [2022-01-18 17:34:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:29,093 INFO L225 Difference]: With dead ends: 21405 [2022-01-18 17:34:29,093 INFO L226 Difference]: Without dead ends: 21381 [2022-01-18 17:34:29,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12520 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5919, Invalid=24881, Unknown=0, NotChecked=0, Total=30800 [2022-01-18 17:34:29,094 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1022 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:29,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 454 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21381 states. [2022-01-18 17:34:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21381 to 10491. [2022-01-18 17:34:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10491 states, 10490 states have (on average 3.85815061963775) internal successors, (40472), 10490 states have internal predecessors, (40472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10491 states to 10491 states and 40472 transitions. [2022-01-18 17:34:29,428 INFO L78 Accepts]: Start accepts. Automaton has 10491 states and 40472 transitions. Word has length 30 [2022-01-18 17:34:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:29,428 INFO L470 AbstractCegarLoop]: Abstraction has 10491 states and 40472 transitions. [2022-01-18 17:34:29,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:34:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10491 states and 40472 transitions. [2022-01-18 17:34:29,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:29,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:29,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:29,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 17:34:29,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:29,648 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1487234549, now seen corresponding path program 46 times [2022-01-18 17:34:29,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657683665] [2022-01-18 17:34:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:29,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:29,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:29,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657683665] [2022-01-18 17:34:29,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657683665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25769319] [2022-01-18 17:34:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:29,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:29,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:29,695 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:29,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 17:34:29,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:29,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:29,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25769319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:29,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 17:34:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132299253] [2022-01-18 17:34:29,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:29,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:34:29,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:34:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:34:29,931 INFO L87 Difference]: Start difference. First operand 10491 states and 40472 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 17:34:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:32,189 INFO L93 Difference]: Finished difference Result 20619 states and 72607 transitions. [2022-01-18 17:34:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-18 17:34:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 30 [2022-01-18 17:34:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:32,242 INFO L225 Difference]: With dead ends: 20619 [2022-01-18 17:34:32,243 INFO L226 Difference]: Without dead ends: 20571 [2022-01-18 17:34:32,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4296, Invalid=17756, Unknown=0, NotChecked=0, Total=22052 [2022-01-18 17:34:32,244 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 753 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:32,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 425 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20571 states. [2022-01-18 17:34:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20571 to 10513. [2022-01-18 17:34:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10513 states, 10512 states have (on average 3.8593036529680367) internal successors, (40569), 10512 states have internal predecessors, (40569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 40569 transitions. [2022-01-18 17:34:32,573 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 40569 transitions. Word has length 30 [2022-01-18 17:34:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:32,573 INFO L470 AbstractCegarLoop]: Abstraction has 10513 states and 40569 transitions. [2022-01-18 17:34:32,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 17:34:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 40569 transitions. [2022-01-18 17:34:32,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:32,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:32,591 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:32,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:32,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 17:34:32,791 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1003077941, now seen corresponding path program 47 times [2022-01-18 17:34:32,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:32,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456231600] [2022-01-18 17:34:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:32,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:32,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456231600] [2022-01-18 17:34:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456231600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100430302] [2022-01-18 17:34:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:34:32,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:32,848 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:32,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 17:34:32,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:34:32,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:32,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:33,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100430302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:33,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:33,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-01-18 17:34:33,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160072003] [2022-01-18 17:34:33,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:33,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:34:33,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:33,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:34:33,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:34:33,085 INFO L87 Difference]: Start difference. First operand 10513 states and 40569 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:34,455 INFO L93 Difference]: Finished difference Result 21294 states and 74335 transitions. [2022-01-18 17:34:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-18 17:34:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:34,504 INFO L225 Difference]: With dead ends: 21294 [2022-01-18 17:34:34,504 INFO L226 Difference]: Without dead ends: 21234 [2022-01-18 17:34:34,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2362, Invalid=8350, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 17:34:34,506 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 688 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:34,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 362 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:34:34,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21234 states. [2022-01-18 17:34:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21234 to 10549. [2022-01-18 17:34:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 3.8569397042093287) internal successors, (40683), 10548 states have internal predecessors, (40683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 40683 transitions. [2022-01-18 17:34:34,840 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 40683 transitions. Word has length 30 [2022-01-18 17:34:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:34,840 INFO L470 AbstractCegarLoop]: Abstraction has 10549 states and 40683 transitions. [2022-01-18 17:34:34,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:34,840 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 40683 transitions. [2022-01-18 17:34:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:34,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:34,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:34,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-18 17:34:35,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:35,058 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1799884623, now seen corresponding path program 48 times [2022-01-18 17:34:35,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:35,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739642477] [2022-01-18 17:34:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:35,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:35,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739642477] [2022-01-18 17:34:35,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739642477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:35,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058625801] [2022-01-18 17:34:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:34:35,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:35,102 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:35,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 17:34:35,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:34:35,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:35,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:35,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:35,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058625801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:35,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:35,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-01-18 17:34:35,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849390330] [2022-01-18 17:34:35,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:35,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:34:35,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:34:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:34:35,316 INFO L87 Difference]: Start difference. First operand 10549 states and 40683 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:36,379 INFO L93 Difference]: Finished difference Result 20594 states and 72770 transitions. [2022-01-18 17:34:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 17:34:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:36,427 INFO L225 Difference]: With dead ends: 20594 [2022-01-18 17:34:36,428 INFO L226 Difference]: Without dead ends: 20570 [2022-01-18 17:34:36,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:34:36,429 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 685 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:36,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 291 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:34:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20570 states. [2022-01-18 17:34:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20570 to 10859. [2022-01-18 17:34:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10859 states, 10858 states have (on average 3.8277767544667527) internal successors, (41562), 10858 states have internal predecessors, (41562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10859 states to 10859 states and 41562 transitions. [2022-01-18 17:34:36,816 INFO L78 Accepts]: Start accepts. Automaton has 10859 states and 41562 transitions. Word has length 30 [2022-01-18 17:34:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:36,816 INFO L470 AbstractCegarLoop]: Abstraction has 10859 states and 41562 transitions. [2022-01-18 17:34:36,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 10859 states and 41562 transitions. [2022-01-18 17:34:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:36,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:36,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:36,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 17:34:37,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:37,047 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:37,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2070394315, now seen corresponding path program 49 times [2022-01-18 17:34:37,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:37,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008971199] [2022-01-18 17:34:37,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:37,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:37,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:37,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:37,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008971199] [2022-01-18 17:34:37,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008971199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:37,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203491768] [2022-01-18 17:34:37,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:37,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:37,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:37,102 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:37,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 17:34:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:37,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:37,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:37,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203491768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:37,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:37,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-01-18 17:34:37,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080149795] [2022-01-18 17:34:37,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:37,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:34:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:37,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:34:37,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:34:37,329 INFO L87 Difference]: Start difference. First operand 10859 states and 41562 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:38,579 INFO L93 Difference]: Finished difference Result 21194 states and 74398 transitions. [2022-01-18 17:34:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 17:34:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:38,628 INFO L225 Difference]: With dead ends: 21194 [2022-01-18 17:34:38,628 INFO L226 Difference]: Without dead ends: 21194 [2022-01-18 17:34:38,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1812, Invalid=6378, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 17:34:38,630 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 531 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:38,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 408 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:38,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21194 states. [2022-01-18 17:34:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21194 to 10615. [2022-01-18 17:34:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10615 states, 10614 states have (on average 3.8362540041454682) internal successors, (40718), 10614 states have internal predecessors, (40718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10615 states to 10615 states and 40718 transitions. [2022-01-18 17:34:38,959 INFO L78 Accepts]: Start accepts. Automaton has 10615 states and 40718 transitions. Word has length 30 [2022-01-18 17:34:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:38,959 INFO L470 AbstractCegarLoop]: Abstraction has 10615 states and 40718 transitions. [2022-01-18 17:34:38,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 10615 states and 40718 transitions. [2022-01-18 17:34:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:38,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:38,976 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:38,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:39,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 17:34:39,176 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:39,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1709119399, now seen corresponding path program 50 times [2022-01-18 17:34:39,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583219289] [2022-01-18 17:34:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:39,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:39,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583219289] [2022-01-18 17:34:39,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583219289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431356316] [2022-01-18 17:34:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:39,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:39,232 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:39,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 17:34:39,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:39,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:39,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:39,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:34:39,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:39,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431356316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:39,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:39,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:34:39,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147534125] [2022-01-18 17:34:39,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:39,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:34:39,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:39,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:34:39,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:34:39,431 INFO L87 Difference]: Start difference. First operand 10615 states and 40718 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:40,163 INFO L93 Difference]: Finished difference Result 18007 states and 64907 transitions. [2022-01-18 17:34:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:34:40,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:40,203 INFO L225 Difference]: With dead ends: 18007 [2022-01-18 17:34:40,203 INFO L226 Difference]: Without dead ends: 17983 [2022-01-18 17:34:40,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:34:40,204 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 500 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:40,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 305 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:34:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17983 states. [2022-01-18 17:34:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17983 to 10712. [2022-01-18 17:34:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10712 states, 10711 states have (on average 3.8259732984782) internal successors, (40980), 10711 states have internal predecessors, (40980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10712 states to 10712 states and 40980 transitions. [2022-01-18 17:34:40,449 INFO L78 Accepts]: Start accepts. Automaton has 10712 states and 40980 transitions. Word has length 30 [2022-01-18 17:34:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:40,449 INFO L470 AbstractCegarLoop]: Abstraction has 10712 states and 40980 transitions. [2022-01-18 17:34:40,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10712 states and 40980 transitions. [2022-01-18 17:34:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:40,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:40,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:40,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:40,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 17:34:40,667 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1875224879, now seen corresponding path program 51 times [2022-01-18 17:34:40,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:40,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157950262] [2022-01-18 17:34:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:40,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:40,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157950262] [2022-01-18 17:34:40,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157950262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539481902] [2022-01-18 17:34:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:40,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:40,708 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:40,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 17:34:40,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:34:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:40,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:34:40,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:40,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:34:40,946 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-18 17:34:40,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:34:41,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:34:41,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:34:41,027 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:34:41,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 32 [2022-01-18 17:34:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:41,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:41,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:34:41,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:34:41,412 INFO L353 Elim1Store]: treesize reduction 15, result has 59.5 percent of original size [2022-01-18 17:34:41,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 38 [2022-01-18 17:34:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539481902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:41,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:41,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-01-18 17:34:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553001617] [2022-01-18 17:34:41,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:34:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:41,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:34:41,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:34:41,586 INFO L87 Difference]: Start difference. First operand 10712 states and 40980 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:53,163 INFO L93 Difference]: Finished difference Result 22235 states and 76160 transitions. [2022-01-18 17:34:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 315 states. [2022-01-18 17:34:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:53,212 INFO L225 Difference]: With dead ends: 22235 [2022-01-18 17:34:53,212 INFO L226 Difference]: Without dead ends: 21879 [2022-01-18 17:34:53,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53870 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=16043, Invalid=97863, Unknown=0, NotChecked=0, Total=113906 [2022-01-18 17:34:53,216 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1776 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2795 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:53,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1118 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2795 Invalid, 0 Unknown, 1085 Unchecked, 1.4s Time] [2022-01-18 17:34:53,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21879 states. [2022-01-18 17:34:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21879 to 10551. [2022-01-18 17:34:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10551 states, 10550 states have (on average 3.8341232227488153) internal successors, (40450), 10550 states have internal predecessors, (40450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 40450 transitions. [2022-01-18 17:34:53,601 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 40450 transitions. Word has length 30 [2022-01-18 17:34:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:53,601 INFO L470 AbstractCegarLoop]: Abstraction has 10551 states and 40450 transitions. [2022-01-18 17:34:53,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 40450 transitions. [2022-01-18 17:34:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:53,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:53,619 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] [2022-01-18 17:34:53,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:53,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:53,820 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:53,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash 898941043, now seen corresponding path program 52 times [2022-01-18 17:34:53,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:53,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712689597] [2022-01-18 17:34:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:53,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:53,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712689597] [2022-01-18 17:34:53,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712689597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:53,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338726368] [2022-01-18 17:34:53,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:53,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:53,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:53,854 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:53,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 17:34:53,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:34:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:34:53,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:54,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338726368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:54,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:54,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-01-18 17:34:54,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762725651] [2022-01-18 17:34:54,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:54,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:34:54,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:34:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:34:54,059 INFO L87 Difference]: Start difference. First operand 10551 states and 40450 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:54,309 INFO L93 Difference]: Finished difference Result 13750 states and 51008 transitions. [2022-01-18 17:34:54,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 17:34:54,310 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:54,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:54,341 INFO L225 Difference]: With dead ends: 13750 [2022-01-18 17:34:54,341 INFO L226 Difference]: Without dead ends: 13710 [2022-01-18 17:34:54,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:34:54,341 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 208 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:54,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 85 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:34:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13710 states. [2022-01-18 17:34:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13710 to 10277. [2022-01-18 17:34:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.822109770338653) internal successors, (39276), 10276 states have internal predecessors, (39276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 39276 transitions. [2022-01-18 17:34:54,540 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 39276 transitions. Word has length 30 [2022-01-18 17:34:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:54,540 INFO L470 AbstractCegarLoop]: Abstraction has 10277 states and 39276 transitions. [2022-01-18 17:34:54,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 39276 transitions. [2022-01-18 17:34:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:54,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:54,557 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] [2022-01-18 17:34:54,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 17:34:54,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:54,758 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash -243984997, now seen corresponding path program 53 times [2022-01-18 17:34:54,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:54,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420845106] [2022-01-18 17:34:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:54,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:54,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420845106] [2022-01-18 17:34:54,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420845106] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:54,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620516548] [2022-01-18 17:34:54,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:34:54,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:54,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:54,793 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:54,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 17:34:54,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:34:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:54,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:34:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 17:34:54,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:55,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620516548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:55,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:55,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2022-01-18 17:34:55,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056942888] [2022-01-18 17:34:55,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:55,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:34:55,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:55,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:34:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:34:55,033 INFO L87 Difference]: Start difference. First operand 10277 states and 39276 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:55,445 INFO L93 Difference]: Finished difference Result 15943 states and 57174 transitions. [2022-01-18 17:34:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:34:55,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:55,484 INFO L225 Difference]: With dead ends: 15943 [2022-01-18 17:34:55,484 INFO L226 Difference]: Without dead ends: 15943 [2022-01-18 17:34:55,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:34:55,484 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 420 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:55,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 122 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:34:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15943 states. [2022-01-18 17:34:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15943 to 11669. [2022-01-18 17:34:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.842817963661296) internal successors, (44838), 11668 states have internal predecessors, (44838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44838 transitions. [2022-01-18 17:34:55,727 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44838 transitions. Word has length 30 [2022-01-18 17:34:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:55,727 INFO L470 AbstractCegarLoop]: Abstraction has 11669 states and 44838 transitions. [2022-01-18 17:34:55,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44838 transitions. [2022-01-18 17:34:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:55,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:55,746 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] [2022-01-18 17:34:55,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:55,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:55,947 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:55,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:55,947 INFO L85 PathProgramCache]: Analyzing trace with hash 14810327, now seen corresponding path program 54 times [2022-01-18 17:34:55,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:55,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770642383] [2022-01-18 17:34:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:55,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:55,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:55,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770642383] [2022-01-18 17:34:55,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770642383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:55,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5779947] [2022-01-18 17:34:55,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:34:55,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:55,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:55,978 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:55,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 17:34:56,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:34:56,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:56,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:34:56,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 17:34:56,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:56,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5779947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:56,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:56,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 13 [2022-01-18 17:34:56,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98697664] [2022-01-18 17:34:56,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:56,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:34:56,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:34:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:34:56,170 INFO L87 Difference]: Start difference. First operand 11669 states and 44838 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 17:34:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:56,460 INFO L93 Difference]: Finished difference Result 14497 states and 53134 transitions. [2022-01-18 17:34:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 17:34:56,460 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 30 [2022-01-18 17:34:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:56,493 INFO L225 Difference]: With dead ends: 14497 [2022-01-18 17:34:56,493 INFO L226 Difference]: Without dead ends: 14497 [2022-01-18 17:34:56,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-01-18 17:34:56,493 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 249 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:56,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 93 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:34:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14497 states. [2022-01-18 17:34:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14497 to 11861. [2022-01-18 17:34:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11861 states, 11860 states have (on average 3.8397133220910624) internal successors, (45539), 11860 states have internal predecessors, (45539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11861 states to 11861 states and 45539 transitions. [2022-01-18 17:34:56,732 INFO L78 Accepts]: Start accepts. Automaton has 11861 states and 45539 transitions. Word has length 30 [2022-01-18 17:34:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 11861 states and 45539 transitions. [2022-01-18 17:34:56,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 17:34:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 11861 states and 45539 transitions. [2022-01-18 17:34:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:56,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:56,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:56,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:56,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:56,952 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1974130723, now seen corresponding path program 55 times [2022-01-18 17:34:56,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:56,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644118186] [2022-01-18 17:34:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:56,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:56,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644118186] [2022-01-18 17:34:56,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644118186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:56,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306796285] [2022-01-18 17:34:56,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:56,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:56,991 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:56,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 17:34:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:57,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:57,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306796285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:57,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:57,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:34:57,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197007906] [2022-01-18 17:34:57,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:57,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:34:57,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:34:57,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:34:57,200 INFO L87 Difference]: Start difference. First operand 11861 states and 45539 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:58,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:58,392 INFO L93 Difference]: Finished difference Result 25004 states and 87435 transitions. [2022-01-18 17:34:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 17:34:58,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:58,453 INFO L225 Difference]: With dead ends: 25004 [2022-01-18 17:34:58,453 INFO L226 Difference]: Without dead ends: 25004 [2022-01-18 17:34:58,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1732, Invalid=6640, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 17:34:58,454 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 619 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:58,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 329 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:34:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25004 states. [2022-01-18 17:34:58,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25004 to 13016. [2022-01-18 17:34:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13016 states, 13015 states have (on average 3.8539377641183252) internal successors, (50159), 13015 states have internal predecessors, (50159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13016 states to 13016 states and 50159 transitions. [2022-01-18 17:34:58,836 INFO L78 Accepts]: Start accepts. Automaton has 13016 states and 50159 transitions. Word has length 30 [2022-01-18 17:34:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:58,837 INFO L470 AbstractCegarLoop]: Abstraction has 13016 states and 50159 transitions. [2022-01-18 17:34:58,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 13016 states and 50159 transitions. [2022-01-18 17:34:58,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:58,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:58,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:34:58,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:59,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:59,060 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:34:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1442224409, now seen corresponding path program 56 times [2022-01-18 17:34:59,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:59,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120315709] [2022-01-18 17:34:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:59,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:59,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120315709] [2022-01-18 17:34:59,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120315709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121946452] [2022-01-18 17:34:59,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:59,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:59,101 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:34:59,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 17:34:59,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:34:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:34:59,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:59,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121946452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:59,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:59,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2022-01-18 17:34:59,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564853731] [2022-01-18 17:34:59,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:59,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:34:59,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:59,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:34:59,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:34:59,289 INFO L87 Difference]: Start difference. First operand 13016 states and 50159 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:00,212 INFO L93 Difference]: Finished difference Result 23852 states and 84334 transitions. [2022-01-18 17:35:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:35:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:00,268 INFO L225 Difference]: With dead ends: 23852 [2022-01-18 17:35:00,268 INFO L226 Difference]: Without dead ends: 23840 [2022-01-18 17:35:00,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2356 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1293, Invalid=4869, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:35:00,269 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 602 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:00,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 276 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:35:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23840 states. [2022-01-18 17:35:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23840 to 12938. [2022-01-18 17:35:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12938 states, 12937 states have (on average 3.859472829867821) internal successors, (49930), 12937 states have internal predecessors, (49930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12938 states to 12938 states and 49930 transitions. [2022-01-18 17:35:00,676 INFO L78 Accepts]: Start accepts. Automaton has 12938 states and 49930 transitions. Word has length 30 [2022-01-18 17:35:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:00,677 INFO L470 AbstractCegarLoop]: Abstraction has 12938 states and 49930 transitions. [2022-01-18 17:35:00,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 12938 states and 49930 transitions. [2022-01-18 17:35:00,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:00,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:00,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:00,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-18 17:35:00,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 17:35:00,901 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1246161191, now seen corresponding path program 57 times [2022-01-18 17:35:00,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:00,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960741586] [2022-01-18 17:35:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:00,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:00,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:00,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960741586] [2022-01-18 17:35:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960741586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:00,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979252995] [2022-01-18 17:35:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:35:00,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:00,940 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:00,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 17:35:00,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:35:00,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:00,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979252995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:01,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 16 [2022-01-18 17:35:01,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870946559] [2022-01-18 17:35:01,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:01,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 17:35:01,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:01,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 17:35:01,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 17:35:01,132 INFO L87 Difference]: Start difference. First operand 12938 states and 49930 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:01,901 INFO L93 Difference]: Finished difference Result 22366 states and 80695 transitions. [2022-01-18 17:35:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:35:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:01,956 INFO L225 Difference]: With dead ends: 22366 [2022-01-18 17:35:01,956 INFO L226 Difference]: Without dead ends: 22334 [2022-01-18 17:35:01,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=911, Invalid=3511, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:35:01,957 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 470 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:01,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 225 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:35:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22334 states. [2022-01-18 17:35:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22334 to 12881. [2022-01-18 17:35:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12881 states, 12880 states have (on average 3.864829192546584) internal successors, (49779), 12880 states have internal predecessors, (49779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12881 states to 12881 states and 49779 transitions. [2022-01-18 17:35:02,295 INFO L78 Accepts]: Start accepts. Automaton has 12881 states and 49779 transitions. Word has length 30 [2022-01-18 17:35:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:02,295 INFO L470 AbstractCegarLoop]: Abstraction has 12881 states and 49779 transitions. [2022-01-18 17:35:02,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 12881 states and 49779 transitions. [2022-01-18 17:35:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:02,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:02,319 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] [2022-01-18 17:35:02,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 17:35:02,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:02,520 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:02,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1525545573, now seen corresponding path program 58 times [2022-01-18 17:35:02,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:02,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608949221] [2022-01-18 17:35:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:02,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:02,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:02,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608949221] [2022-01-18 17:35:02,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608949221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:02,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737818804] [2022-01-18 17:35:02,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:02,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:02,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:02,554 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:02,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 17:35:02,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 17:35:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:02,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:02,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737818804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:02,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:02,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-01-18 17:35:02,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478467188] [2022-01-18 17:35:02,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:02,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:35:02,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:35:02,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:35:02,739 INFO L87 Difference]: Start difference. First operand 12881 states and 49779 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:03,008 INFO L93 Difference]: Finished difference Result 14655 states and 54802 transitions. [2022-01-18 17:35:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 17:35:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:03,102 INFO L225 Difference]: With dead ends: 14655 [2022-01-18 17:35:03,102 INFO L226 Difference]: Without dead ends: 14655 [2022-01-18 17:35:03,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2022-01-18 17:35:03,103 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 186 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:03,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 82 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:35:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14655 states. [2022-01-18 17:35:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14655 to 12646. [2022-01-18 17:35:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12646 states, 12645 states have (on average 3.868880980624753) internal successors, (48922), 12645 states have internal predecessors, (48922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12646 states to 12646 states and 48922 transitions. [2022-01-18 17:35:03,332 INFO L78 Accepts]: Start accepts. Automaton has 12646 states and 48922 transitions. Word has length 30 [2022-01-18 17:35:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 12646 states and 48922 transitions. [2022-01-18 17:35:03,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12646 states and 48922 transitions. [2022-01-18 17:35:03,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:03,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:03,354 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:03,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 17:35:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:03,555 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash -435342281, now seen corresponding path program 59 times [2022-01-18 17:35:03,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:03,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059801838] [2022-01-18 17:35:03,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:03,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:03,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:03,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059801838] [2022-01-18 17:35:03,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059801838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:03,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570018699] [2022-01-18 17:35:03,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:03,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:03,596 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:03,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 17:35:03,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:35:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:03,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:03,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570018699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:03,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:03,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-01-18 17:35:03,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920346842] [2022-01-18 17:35:03,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:35:03,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:35:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:35:03,782 INFO L87 Difference]: Start difference. First operand 12646 states and 48922 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:04,583 INFO L93 Difference]: Finished difference Result 21690 states and 78211 transitions. [2022-01-18 17:35:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:35:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:04,636 INFO L225 Difference]: With dead ends: 21690 [2022-01-18 17:35:04,636 INFO L226 Difference]: Without dead ends: 21690 [2022-01-18 17:35:04,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=903, Invalid=3129, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:35:04,637 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 398 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:04,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 308 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:35:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21690 states. [2022-01-18 17:35:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21690 to 13376. [2022-01-18 17:35:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.8450841121495327) internal successors, (51428), 13375 states have internal predecessors, (51428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 51428 transitions. [2022-01-18 17:35:04,983 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 51428 transitions. Word has length 30 [2022-01-18 17:35:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:04,983 INFO L470 AbstractCegarLoop]: Abstraction has 13376 states and 51428 transitions. [2022-01-18 17:35:04,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 51428 transitions. [2022-01-18 17:35:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:05,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:05,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:05,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:05,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:05,207 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:05,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 96564033, now seen corresponding path program 60 times [2022-01-18 17:35:05,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:05,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077354700] [2022-01-18 17:35:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:05,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:05,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077354700] [2022-01-18 17:35:05,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077354700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:05,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451919508] [2022-01-18 17:35:05,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:35:05,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:05,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:05,250 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:05,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 17:35:05,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 17:35:05,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:05,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:05,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451919508] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:05,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:05,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 17:35:05,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71867706] [2022-01-18 17:35:05,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:05,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 17:35:05,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:05,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 17:35:05,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-18 17:35:05,434 INFO L87 Difference]: Start difference. First operand 13376 states and 51428 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:06,100 INFO L93 Difference]: Finished difference Result 20800 states and 75794 transitions. [2022-01-18 17:35:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:35:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:06,158 INFO L225 Difference]: With dead ends: 20800 [2022-01-18 17:35:06,158 INFO L226 Difference]: Without dead ends: 20788 [2022-01-18 17:35:06,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=608, Invalid=2044, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 17:35:06,159 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 382 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:06,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 235 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:35:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20788 states. [2022-01-18 17:35:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20788 to 13222. [2022-01-18 17:35:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13222 states, 13221 states have (on average 3.855911050601316) internal successors, (50979), 13221 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13222 states to 13222 states and 50979 transitions. [2022-01-18 17:35:06,532 INFO L78 Accepts]: Start accepts. Automaton has 13222 states and 50979 transitions. Word has length 30 [2022-01-18 17:35:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 13222 states and 50979 transitions. [2022-01-18 17:35:06,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 13222 states and 50979 transitions. [2022-01-18 17:35:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:06,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:06,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:06,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:06,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:06,756 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash -542841171, now seen corresponding path program 61 times [2022-01-18 17:35:06,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:06,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690380939] [2022-01-18 17:35:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:06,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:06,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690380939] [2022-01-18 17:35:06,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690380939] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:06,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618668828] [2022-01-18 17:35:06,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:35:06,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:06,802 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:06,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 17:35:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:06,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:06,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:06,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:06,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618668828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:06,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:06,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-01-18 17:35:06,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656006027] [2022-01-18 17:35:06,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:06,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 17:35:06,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:06,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 17:35:06,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-18 17:35:06,998 INFO L87 Difference]: Start difference. First operand 13222 states and 50979 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:07,604 INFO L93 Difference]: Finished difference Result 20946 states and 76381 transitions. [2022-01-18 17:35:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:35:07,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:07,656 INFO L225 Difference]: With dead ends: 20946 [2022-01-18 17:35:07,656 INFO L226 Difference]: Without dead ends: 20926 [2022-01-18 17:35:07,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=574, Invalid=2182, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 17:35:07,657 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 390 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:07,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 233 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:35:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20926 states. [2022-01-18 17:35:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20926 to 13408. [2022-01-18 17:35:07,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13408 states, 13407 states have (on average 3.8412769448795405) internal successors, (51500), 13407 states have internal predecessors, (51500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13408 states to 13408 states and 51500 transitions. [2022-01-18 17:35:07,989 INFO L78 Accepts]: Start accepts. Automaton has 13408 states and 51500 transitions. Word has length 30 [2022-01-18 17:35:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:07,989 INFO L470 AbstractCegarLoop]: Abstraction has 13408 states and 51500 transitions. [2022-01-18 17:35:07,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13408 states and 51500 transitions. [2022-01-18 17:35:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:08,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:08,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:08,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 17:35:08,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:08,213 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:08,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1968514673, now seen corresponding path program 62 times [2022-01-18 17:35:08,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:08,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046519732] [2022-01-18 17:35:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:08,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:08,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046519732] [2022-01-18 17:35:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046519732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454789607] [2022-01-18 17:35:08,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:35:08,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:08,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:08,263 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:08,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 17:35:08,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:08,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:08,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:08,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:08,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454789607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:08,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:08,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:35:08,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230865595] [2022-01-18 17:35:08,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:08,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:35:08,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:35:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:35:08,521 INFO L87 Difference]: Start difference. First operand 13408 states and 51500 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 17:35:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:10,310 INFO L93 Difference]: Finished difference Result 19415 states and 69884 transitions. [2022-01-18 17:35:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 17:35:10,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 30 [2022-01-18 17:35:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:10,358 INFO L225 Difference]: With dead ends: 19415 [2022-01-18 17:35:10,359 INFO L226 Difference]: Without dead ends: 19415 [2022-01-18 17:35:10,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2280, Invalid=9276, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 17:35:10,360 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 492 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:10,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 456 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19415 states. [2022-01-18 17:35:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19415 to 14051. [2022-01-18 17:35:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14051 states, 14050 states have (on average 3.817224199288256) internal successors, (53632), 14050 states have internal predecessors, (53632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:10,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14051 states to 14051 states and 53632 transitions. [2022-01-18 17:35:10,721 INFO L78 Accepts]: Start accepts. Automaton has 14051 states and 53632 transitions. Word has length 30 [2022-01-18 17:35:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:10,722 INFO L470 AbstractCegarLoop]: Abstraction has 14051 states and 53632 transitions. [2022-01-18 17:35:10,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 17:35:10,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14051 states and 53632 transitions. [2022-01-18 17:35:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:10,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:10,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:10,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-01-18 17:35:10,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 17:35:10,947 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:10,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:10,948 INFO L85 PathProgramCache]: Analyzing trace with hash -341365967, now seen corresponding path program 63 times [2022-01-18 17:35:10,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:10,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693644328] [2022-01-18 17:35:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:10,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:10,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:10,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693644328] [2022-01-18 17:35:10,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693644328] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:10,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225020924] [2022-01-18 17:35:10,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:35:10,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:10,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:11,000 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:11,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 17:35:11,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:35:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:11,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:11,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:11,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225020924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:11,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:11,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 21 [2022-01-18 17:35:11,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124201317] [2022-01-18 17:35:11,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:11,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:35:11,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:11,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:35:11,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:35:11,257 INFO L87 Difference]: Start difference. First operand 14051 states and 53632 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:35:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:12,549 INFO L93 Difference]: Finished difference Result 18580 states and 67695 transitions. [2022-01-18 17:35:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 17:35:12,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 30 [2022-01-18 17:35:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:12,593 INFO L225 Difference]: With dead ends: 18580 [2022-01-18 17:35:12,593 INFO L226 Difference]: Without dead ends: 18572 [2022-01-18 17:35:12,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1558, Invalid=5582, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:35:12,594 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 410 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:12,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 308 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:35:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18572 states. [2022-01-18 17:35:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18572 to 13997. [2022-01-18 17:35:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13997 states, 13996 states have (on average 3.819734209774221) internal successors, (53461), 13996 states have internal predecessors, (53461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13997 states to 13997 states and 53461 transitions. [2022-01-18 17:35:13,047 INFO L78 Accepts]: Start accepts. Automaton has 13997 states and 53461 transitions. Word has length 30 [2022-01-18 17:35:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:13,047 INFO L470 AbstractCegarLoop]: Abstraction has 13997 states and 53461 transitions. [2022-01-18 17:35:13,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 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 17:35:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13997 states and 53461 transitions. [2022-01-18 17:35:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:13,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:13,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:13,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:13,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:13,273 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1508609255, now seen corresponding path program 64 times [2022-01-18 17:35:13,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:13,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140373590] [2022-01-18 17:35:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:13,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:13,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:13,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140373590] [2022-01-18 17:35:13,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140373590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:13,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071585793] [2022-01-18 17:35:13,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:13,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:13,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:13,317 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:13,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 17:35:13,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:13,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:13,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:13,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071585793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:13,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:13,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:35:13,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831661276] [2022-01-18 17:35:13,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:13,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:35:13,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:35:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:35:13,572 INFO L87 Difference]: Start difference. First operand 13997 states and 53461 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:35:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:15,095 INFO L93 Difference]: Finished difference Result 20422 states and 72750 transitions. [2022-01-18 17:35:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 17:35:15,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 30 [2022-01-18 17:35:15,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:15,143 INFO L225 Difference]: With dead ends: 20422 [2022-01-18 17:35:15,144 INFO L226 Difference]: Without dead ends: 20422 [2022-01-18 17:35:15,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2164, Invalid=8966, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:35:15,145 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 572 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:15,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 489 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:35:15,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20422 states. [2022-01-18 17:35:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20422 to 14517. [2022-01-18 17:35:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8018049049324882) internal successors, (55187), 14516 states have internal predecessors, (55187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55187 transitions. [2022-01-18 17:35:15,490 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55187 transitions. Word has length 30 [2022-01-18 17:35:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:15,491 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55187 transitions. [2022-01-18 17:35:15,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:35:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55187 transitions. [2022-01-18 17:35:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:15,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:15,516 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:15,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 17:35:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:15,716 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 453231861, now seen corresponding path program 65 times [2022-01-18 17:35:15,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353189040] [2022-01-18 17:35:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:15,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:15,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353189040] [2022-01-18 17:35:15,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353189040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796431940] [2022-01-18 17:35:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:15,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:15,765 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:15,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 17:35:15,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:35:15,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:15,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:15,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:16,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796431940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:16,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:16,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:35:16,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478878230] [2022-01-18 17:35:16,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:16,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:35:16,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:35:16,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:35:16,022 INFO L87 Difference]: Start difference. First operand 14517 states and 55187 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:35:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:17,223 INFO L93 Difference]: Finished difference Result 19474 states and 70379 transitions. [2022-01-18 17:35:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 17:35:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 30 [2022-01-18 17:35:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:17,269 INFO L225 Difference]: With dead ends: 19474 [2022-01-18 17:35:17,269 INFO L226 Difference]: Without dead ends: 19466 [2022-01-18 17:35:17,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1617, Invalid=6215, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 17:35:17,270 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 508 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:17,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 323 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:35:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19466 states. [2022-01-18 17:35:17,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19466 to 14517. [2022-01-18 17:35:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8015293469275284) internal successors, (55183), 14516 states have internal predecessors, (55183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55183 transitions. [2022-01-18 17:35:17,648 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55183 transitions. Word has length 30 [2022-01-18 17:35:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:17,648 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55183 transitions. [2022-01-18 17:35:17,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:35:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55183 transitions. [2022-01-18 17:35:17,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:17,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:17,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:17,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-18 17:35:17,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:17,874 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:17,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1936366799, now seen corresponding path program 66 times [2022-01-18 17:35:17,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:17,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967406248] [2022-01-18 17:35:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:17,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:17,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967406248] [2022-01-18 17:35:17,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967406248] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:17,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502196883] [2022-01-18 17:35:17,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:35:17,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:17,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:17,918 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:17,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 17:35:17,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:35:17,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:17,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:17,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:18,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:18,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502196883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:18,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:18,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-01-18 17:35:18,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591855568] [2022-01-18 17:35:18,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:18,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:35:18,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:18,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:35:18,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:35:18,151 INFO L87 Difference]: Start difference. First operand 14517 states and 55183 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 17:35:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:19,196 INFO L93 Difference]: Finished difference Result 19234 states and 69889 transitions. [2022-01-18 17:35:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 17:35:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 30 [2022-01-18 17:35:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:19,253 INFO L225 Difference]: With dead ends: 19234 [2022-01-18 17:35:19,254 INFO L226 Difference]: Without dead ends: 19210 [2022-01-18 17:35:19,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1170, Invalid=4530, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:35:19,255 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 456 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 320 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:35:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19210 states. [2022-01-18 17:35:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19210 to 14517. [2022-01-18 17:35:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14517 states, 14516 states have (on average 3.8009782309176083) internal successors, (55175), 14516 states have internal predecessors, (55175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14517 states to 14517 states and 55175 transitions. [2022-01-18 17:35:19,619 INFO L78 Accepts]: Start accepts. Automaton has 14517 states and 55175 transitions. Word has length 30 [2022-01-18 17:35:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:19,619 INFO L470 AbstractCegarLoop]: Abstraction has 14517 states and 55175 transitions. [2022-01-18 17:35:19,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 17:35:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 14517 states and 55175 transitions. [2022-01-18 17:35:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:19,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:19,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:19,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 17:35:19,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:19,844 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash -812528685, now seen corresponding path program 67 times [2022-01-18 17:35:19,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:19,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045628971] [2022-01-18 17:35:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:19,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:19,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045628971] [2022-01-18 17:35:19,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045628971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018565810] [2022-01-18 17:35:19,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:35:19,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:19,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:19,899 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:19,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 17:35:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:19,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018565810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:20,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:20,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 17:35:20,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981574850] [2022-01-18 17:35:20,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:20,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:35:20,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:35:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:35:20,121 INFO L87 Difference]: Start difference. First operand 14517 states and 55175 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:21,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:21,156 INFO L93 Difference]: Finished difference Result 18899 states and 68968 transitions. [2022-01-18 17:35:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 17:35:21,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:21,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:21,202 INFO L225 Difference]: With dead ends: 18899 [2022-01-18 17:35:21,202 INFO L226 Difference]: Without dead ends: 18863 [2022-01-18 17:35:21,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=3944, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:35:21,202 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 300 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:21,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 288 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:35:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18863 states. [2022-01-18 17:35:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18863 to 14621. [2022-01-18 17:35:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14621 states, 14620 states have (on average 3.7988372093023255) internal successors, (55539), 14620 states have internal predecessors, (55539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14621 states to 14621 states and 55539 transitions. [2022-01-18 17:35:21,529 INFO L78 Accepts]: Start accepts. Automaton has 14621 states and 55539 transitions. Word has length 30 [2022-01-18 17:35:21,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:21,529 INFO L470 AbstractCegarLoop]: Abstraction has 14621 states and 55539 transitions. [2022-01-18 17:35:21,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 14621 states and 55539 transitions. [2022-01-18 17:35:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:21,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:21,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:21,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 17:35:21,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:21,755 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:21,756 INFO L85 PathProgramCache]: Analyzing trace with hash 907843979, now seen corresponding path program 68 times [2022-01-18 17:35:21,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:21,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236828057] [2022-01-18 17:35:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:21,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:21,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236828057] [2022-01-18 17:35:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236828057] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:21,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467640344] [2022-01-18 17:35:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:35:21,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:21,805 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:21,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 17:35:21,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:21,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:21,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:22,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467640344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:22,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:22,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 17:35:22,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047370928] [2022-01-18 17:35:22,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:22,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:35:22,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:35:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:35:22,070 INFO L87 Difference]: Start difference. First operand 14621 states and 55539 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 17:35:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:25,578 INFO L93 Difference]: Finished difference Result 30029 states and 104622 transitions. [2022-01-18 17:35:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-01-18 17:35:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 30 [2022-01-18 17:35:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:25,659 INFO L225 Difference]: With dead ends: 30029 [2022-01-18 17:35:25,659 INFO L226 Difference]: Without dead ends: 30029 [2022-01-18 17:35:25,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18427 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7199, Invalid=34621, Unknown=0, NotChecked=0, Total=41820 [2022-01-18 17:35:25,664 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 821 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:25,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 633 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:35:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30029 states. [2022-01-18 17:35:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30029 to 16135. [2022-01-18 17:35:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16135 states, 16134 states have (on average 3.829738440560307) internal successors, (61789), 16134 states have internal predecessors, (61789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16135 states to 16135 states and 61789 transitions. [2022-01-18 17:35:26,223 INFO L78 Accepts]: Start accepts. Automaton has 16135 states and 61789 transitions. Word has length 30 [2022-01-18 17:35:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:26,223 INFO L470 AbstractCegarLoop]: Abstraction has 16135 states and 61789 transitions. [2022-01-18 17:35:26,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 17:35:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 16135 states and 61789 transitions. [2022-01-18 17:35:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:26,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:26,252 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:26,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:26,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 17:35:26,453 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1495589301, now seen corresponding path program 69 times [2022-01-18 17:35:26,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143900794] [2022-01-18 17:35:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:26,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:26,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143900794] [2022-01-18 17:35:26,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143900794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047027882] [2022-01-18 17:35:26,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:35:26,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:26,501 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 17:35:26,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:35:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 17:35:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:26,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:35:26,778 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:35:26,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:35:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:26,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:27,078 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:35:27,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:35:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:27,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047027882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:27,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:27,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-01-18 17:35:27,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554202361] [2022-01-18 17:35:27,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:27,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:35:27,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:27,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:35:27,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:35:27,302 INFO L87 Difference]: Start difference. First operand 16135 states and 61789 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:32,038 INFO L93 Difference]: Finished difference Result 25546 states and 92153 transitions. [2022-01-18 17:35:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-18 17:35:32,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:32,103 INFO L225 Difference]: With dead ends: 25546 [2022-01-18 17:35:32,103 INFO L226 Difference]: Without dead ends: 25465 [2022-01-18 17:35:32,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12999 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3381, Invalid=28125, Unknown=0, NotChecked=0, Total=31506 [2022-01-18 17:35:32,105 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 886 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 3651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1389 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:32,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1177 Invalid, 3651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2085 Invalid, 0 Unknown, 1389 Unchecked, 0.8s Time] [2022-01-18 17:35:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2022-01-18 17:35:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 16044. [2022-01-18 17:35:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16044 states, 16043 states have (on average 3.840304182509506) internal successors, (61610), 16043 states have internal predecessors, (61610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16044 states to 16044 states and 61610 transitions. [2022-01-18 17:35:32,544 INFO L78 Accepts]: Start accepts. Automaton has 16044 states and 61610 transitions. Word has length 30 [2022-01-18 17:35:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:32,544 INFO L470 AbstractCegarLoop]: Abstraction has 16044 states and 61610 transitions. [2022-01-18 17:35:32,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 16044 states and 61610 transitions. [2022-01-18 17:35:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:32,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:32,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:32,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 17:35:32,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 17:35:32,774 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash -759533131, now seen corresponding path program 70 times [2022-01-18 17:35:32,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:32,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166645713] [2022-01-18 17:35:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:32,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:32,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166645713] [2022-01-18 17:35:32,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166645713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:32,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954981257] [2022-01-18 17:35:32,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:32,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:32,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:32,816 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:32,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 17:35:32,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:32,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:32,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:33,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954981257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:33,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:33,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 17:35:33,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250850722] [2022-01-18 17:35:33,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:33,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:35:33,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:35:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:35:33,084 INFO L87 Difference]: Start difference. First operand 16044 states and 61610 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 17:35:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:36,560 INFO L93 Difference]: Finished difference Result 39563 states and 138975 transitions. [2022-01-18 17:35:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-18 17:35:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 30 [2022-01-18 17:35:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:36,691 INFO L225 Difference]: With dead ends: 39563 [2022-01-18 17:35:36,691 INFO L226 Difference]: Without dead ends: 39563 [2022-01-18 17:35:36,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16013 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7311, Invalid=28979, Unknown=0, NotChecked=0, Total=36290 [2022-01-18 17:35:36,693 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 827 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:36,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 650 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:35:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39563 states. [2022-01-18 17:35:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39563 to 16139. [2022-01-18 17:35:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16138 states have (on average 3.849485685958607) internal successors, (62123), 16138 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 62123 transitions. [2022-01-18 17:35:37,396 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 62123 transitions. Word has length 30 [2022-01-18 17:35:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:37,397 INFO L470 AbstractCegarLoop]: Abstraction has 16139 states and 62123 transitions. [2022-01-18 17:35:37,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 17:35:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 62123 transitions. [2022-01-18 17:35:37,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:37,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:37,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:37,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:37,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:37,631 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:37,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1299570705, now seen corresponding path program 71 times [2022-01-18 17:35:37,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:37,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115636837] [2022-01-18 17:35:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:37,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:37,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115636837] [2022-01-18 17:35:37,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115636837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391272932] [2022-01-18 17:35:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:37,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:37,673 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:37,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 17:35:37,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:35:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:37,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:35:37,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391272932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:37,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:37,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 17:35:37,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498073675] [2022-01-18 17:35:37,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:37,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:35:37,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:37,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:35:37,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:35:37,942 INFO L87 Difference]: Start difference. First operand 16139 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 17:35:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:42,022 INFO L93 Difference]: Finished difference Result 39410 states and 139201 transitions. [2022-01-18 17:35:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-01-18 17:35:42,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 30 [2022-01-18 17:35:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:42,142 INFO L225 Difference]: With dead ends: 39410 [2022-01-18 17:35:42,142 INFO L226 Difference]: Without dead ends: 39410 [2022-01-18 17:35:42,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22928 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9003, Invalid=42299, Unknown=0, NotChecked=0, Total=51302 [2022-01-18 17:35:42,144 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 887 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:42,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 656 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:35:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39410 states. [2022-01-18 17:35:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39410 to 15793. [2022-01-18 17:35:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15793 states, 15792 states have (on average 3.83314336372847) internal successors, (60533), 15792 states have internal predecessors, (60533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15793 states to 15793 states and 60533 transitions. [2022-01-18 17:35:42,784 INFO L78 Accepts]: Start accepts. Automaton has 15793 states and 60533 transitions. Word has length 30 [2022-01-18 17:35:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 15793 states and 60533 transitions. [2022-01-18 17:35:42,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 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 17:35:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15793 states and 60533 transitions. [2022-01-18 17:35:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:42,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:42,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:42,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 17:35:43,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:43,012 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:43,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1712540267, now seen corresponding path program 72 times [2022-01-18 17:35:43,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310140534] [2022-01-18 17:35:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:43,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:43,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310140534] [2022-01-18 17:35:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310140534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660831227] [2022-01-18 17:35:43,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:35:43,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:43,055 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:43,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 17:35:43,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:35:43,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:43,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:43,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:43,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660831227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:43,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:43,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:35:43,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117451520] [2022-01-18 17:35:43,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:43,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:35:43,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:35:43,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:35:43,346 INFO L87 Difference]: Start difference. First operand 15793 states and 60533 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 17:35:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:45,840 INFO L93 Difference]: Finished difference Result 32331 states and 115471 transitions. [2022-01-18 17:35:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-18 17:35:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 30 [2022-01-18 17:35:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:45,927 INFO L225 Difference]: With dead ends: 32331 [2022-01-18 17:35:45,927 INFO L226 Difference]: Without dead ends: 32331 [2022-01-18 17:35:45,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10220 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4495, Invalid=19375, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 17:35:45,930 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 845 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:45,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [845 Valid, 649 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32331 states. [2022-01-18 17:35:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32331 to 18359. [2022-01-18 17:35:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18359 states, 18358 states have (on average 3.830591567708901) internal successors, (70322), 18358 states have internal predecessors, (70322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18359 states to 18359 states and 70322 transitions. [2022-01-18 17:35:46,542 INFO L78 Accepts]: Start accepts. Automaton has 18359 states and 70322 transitions. Word has length 30 [2022-01-18 17:35:46,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:46,542 INFO L470 AbstractCegarLoop]: Abstraction has 18359 states and 70322 transitions. [2022-01-18 17:35:46,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 17:35:46,543 INFO L276 IsEmpty]: Start isEmpty. Operand 18359 states and 70322 transitions. [2022-01-18 17:35:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:46,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:46,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:46,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 17:35:46,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 17:35:46,775 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash 657162873, now seen corresponding path program 73 times [2022-01-18 17:35:46,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:46,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468515731] [2022-01-18 17:35:46,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:46,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:46,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:46,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468515731] [2022-01-18 17:35:46,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468515731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:46,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167406780] [2022-01-18 17:35:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:35:46,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:46,818 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:46,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 17:35:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:46,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:47,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167406780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:47,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:47,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-01-18 17:35:47,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814870757] [2022-01-18 17:35:47,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:47,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:35:47,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:35:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:35:47,094 INFO L87 Difference]: Start difference. First operand 18359 states and 70322 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 17:35:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:49,473 INFO L93 Difference]: Finished difference Result 33551 states and 121071 transitions. [2022-01-18 17:35:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-18 17:35:49,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 30 [2022-01-18 17:35:49,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:49,565 INFO L225 Difference]: With dead ends: 33551 [2022-01-18 17:35:49,565 INFO L226 Difference]: Without dead ends: 33539 [2022-01-18 17:35:49,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9441 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4177, Invalid=18473, Unknown=0, NotChecked=0, Total=22650 [2022-01-18 17:35:49,569 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 851 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:49,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 523 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33539 states. [2022-01-18 17:35:50,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33539 to 17993. [2022-01-18 17:35:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17993 states, 17992 states have (on average 3.842207647843486) internal successors, (69129), 17992 states have internal predecessors, (69129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17993 states to 17993 states and 69129 transitions. [2022-01-18 17:35:50,225 INFO L78 Accepts]: Start accepts. Automaton has 17993 states and 69129 transitions. Word has length 30 [2022-01-18 17:35:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:50,225 INFO L470 AbstractCegarLoop]: Abstraction has 17993 states and 69129 transitions. [2022-01-18 17:35:50,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 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 17:35:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 17993 states and 69129 transitions. [2022-01-18 17:35:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:50,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:50,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:50,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 17:35:50,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:50,459 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:50,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2140297811, now seen corresponding path program 74 times [2022-01-18 17:35:50,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:50,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107804120] [2022-01-18 17:35:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:50,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:50,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:50,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107804120] [2022-01-18 17:35:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107804120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137031840] [2022-01-18 17:35:50,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:35:50,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:50,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:50,504 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:50,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 17:35:50,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:50,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:50,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137031840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:50,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:50,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 17:35:50,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871147364] [2022-01-18 17:35:50,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:50,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:35:50,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:50,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:35:50,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:35:50,757 INFO L87 Difference]: Start difference. First operand 17993 states and 69129 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 17:35:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:52,778 INFO L93 Difference]: Finished difference Result 33062 states and 119951 transitions. [2022-01-18 17:35:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-18 17:35:52,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 30 [2022-01-18 17:35:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:52,874 INFO L225 Difference]: With dead ends: 33062 [2022-01-18 17:35:52,874 INFO L226 Difference]: Without dead ends: 33026 [2022-01-18 17:35:52,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6665 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3024, Invalid=13746, Unknown=0, NotChecked=0, Total=16770 [2022-01-18 17:35:52,877 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 660 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:52,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 434 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33026 states. [2022-01-18 17:35:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33026 to 17977. [2022-01-18 17:35:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17977 states, 17976 states have (on average 3.8412883845126835) internal successors, (69051), 17976 states have internal predecessors, (69051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17977 states to 17977 states and 69051 transitions. [2022-01-18 17:35:53,444 INFO L78 Accepts]: Start accepts. Automaton has 17977 states and 69051 transitions. Word has length 30 [2022-01-18 17:35:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:53,444 INFO L470 AbstractCegarLoop]: Abstraction has 17977 states and 69051 transitions. [2022-01-18 17:35:53,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 17:35:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 17977 states and 69051 transitions. [2022-01-18 17:35:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:53,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:53,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:53,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 17:35:53,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:53,676 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -608597673, now seen corresponding path program 75 times [2022-01-18 17:35:53,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:53,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845567984] [2022-01-18 17:35:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:53,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:53,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:53,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845567984] [2022-01-18 17:35:53,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845567984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:53,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478507945] [2022-01-18 17:35:53,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:35:53,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:53,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:53,720 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:53,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 17:35:53,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:35:53,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:53,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:53,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:53,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478507945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:53,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:53,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 17:35:53,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88230829] [2022-01-18 17:35:53,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 17:35:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 17:35:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 17:35:53,967 INFO L87 Difference]: Start difference. First operand 17977 states and 69051 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:55,620 INFO L93 Difference]: Finished difference Result 32074 states and 117370 transitions. [2022-01-18 17:35:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 17:35:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:55,710 INFO L225 Difference]: With dead ends: 32074 [2022-01-18 17:35:55,710 INFO L226 Difference]: Without dead ends: 32038 [2022-01-18 17:35:55,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2126, Invalid=9004, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 17:35:55,712 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 548 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:55,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 323 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32038 states. [2022-01-18 17:35:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32038 to 17959. [2022-01-18 17:35:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17959 states, 17958 states have (on average 3.8416304710992315) internal successors, (68988), 17958 states have internal predecessors, (68988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17959 states to 17959 states and 68988 transitions. [2022-01-18 17:35:56,260 INFO L78 Accepts]: Start accepts. Automaton has 17959 states and 68988 transitions. Word has length 30 [2022-01-18 17:35:56,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:56,260 INFO L470 AbstractCegarLoop]: Abstraction has 17959 states and 68988 transitions. [2022-01-18 17:35:56,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 17959 states and 68988 transitions. [2022-01-18 17:35:56,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:56,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:56,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:56,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-01-18 17:35:56,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 17:35:56,495 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:35:56,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash 109228903, now seen corresponding path program 76 times [2022-01-18 17:35:56,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:56,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342119231] [2022-01-18 17:35:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:56,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:56,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342119231] [2022-01-18 17:35:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342119231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:56,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227187722] [2022-01-18 17:35:56,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:56,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:56,537 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:35:56,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 17:35:56,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:56,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:35:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:56,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:56,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227187722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:56,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:56,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:35:56,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516696795] [2022-01-18 17:35:56,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:56,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:35:56,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:35:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:35:56,806 INFO L87 Difference]: Start difference. First operand 17959 states and 68988 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:35:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:59,010 INFO L93 Difference]: Finished difference Result 37595 states and 135163 transitions. [2022-01-18 17:35:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-18 17:35:59,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 30 [2022-01-18 17:35:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:59,225 INFO L225 Difference]: With dead ends: 37595 [2022-01-18 17:35:59,225 INFO L226 Difference]: Without dead ends: 37595 [2022-01-18 17:35:59,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7508 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3980, Invalid=13312, Unknown=0, NotChecked=0, Total=17292 [2022-01-18 17:35:59,226 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 977 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:59,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 479 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37595 states. [2022-01-18 17:35:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37595 to 21412. [2022-01-18 17:35:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 21411 states have (on average 3.908224744290318) internal successors, (83679), 21411 states have internal predecessors, (83679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 83679 transitions. [2022-01-18 17:35:59,819 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 83679 transitions. Word has length 30 [2022-01-18 17:35:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:59,820 INFO L470 AbstractCegarLoop]: Abstraction has 21412 states and 83679 transitions. [2022-01-18 17:35:59,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:35:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 83679 transitions. [2022-01-18 17:35:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:59,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:59,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:35:59,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 17:36:00,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 17:36:00,058 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:00,059 INFO L85 PathProgramCache]: Analyzing trace with hash -946148491, now seen corresponding path program 77 times [2022-01-18 17:36:00,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473753521] [2022-01-18 17:36:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:00,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:00,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473753521] [2022-01-18 17:36:00,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473753521] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200617113] [2022-01-18 17:36:00,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:36:00,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:00,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:00,101 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:00,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 17:36:00,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 17:36:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:00,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:00,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:00,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200617113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:00,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:00,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:36:00,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694650728] [2022-01-18 17:36:00,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:00,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:36:00,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:00,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:36:00,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:36:00,379 INFO L87 Difference]: Start difference. First operand 21412 states and 83679 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:36:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:03,023 INFO L93 Difference]: Finished difference Result 39919 states and 144205 transitions. [2022-01-18 17:36:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-18 17:36:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 30 [2022-01-18 17:36:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:03,140 INFO L225 Difference]: With dead ends: 39919 [2022-01-18 17:36:03,140 INFO L226 Difference]: Without dead ends: 39899 [2022-01-18 17:36:03,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11986 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5282, Invalid=22108, Unknown=0, NotChecked=0, Total=27390 [2022-01-18 17:36:03,143 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1105 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:03,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 396 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:36:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39899 states. [2022-01-18 17:36:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39899 to 21371. [2022-01-18 17:36:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21371 states, 21370 states have (on average 3.907440336920917) internal successors, (83502), 21370 states have internal predecessors, (83502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21371 states to 21371 states and 83502 transitions. [2022-01-18 17:36:04,056 INFO L78 Accepts]: Start accepts. Automaton has 21371 states and 83502 transitions. Word has length 30 [2022-01-18 17:36:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:04,056 INFO L470 AbstractCegarLoop]: Abstraction has 21371 states and 83502 transitions. [2022-01-18 17:36:04,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 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 17:36:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 21371 states and 83502 transitions. [2022-01-18 17:36:04,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:04,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:04,093 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:04,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 17:36:04,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:04,293 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:04,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash -94905237, now seen corresponding path program 78 times [2022-01-18 17:36:04,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:04,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906227151] [2022-01-18 17:36:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:04,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:04,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:04,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906227151] [2022-01-18 17:36:04,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906227151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:04,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514953916] [2022-01-18 17:36:04,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:04,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:04,335 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:04,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 17:36:04,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:36:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:04,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:04,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:04,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:04,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514953916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:04,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:04,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:36:04,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326298028] [2022-01-18 17:36:04,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:04,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:36:04,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:36:04,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:36:04,600 INFO L87 Difference]: Start difference. First operand 21371 states and 83502 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 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 17:36:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:07,341 INFO L93 Difference]: Finished difference Result 41385 states and 149926 transitions. [2022-01-18 17:36:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-18 17:36:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 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 30 [2022-01-18 17:36:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:07,461 INFO L225 Difference]: With dead ends: 41385 [2022-01-18 17:36:07,462 INFO L226 Difference]: Without dead ends: 41385 [2022-01-18 17:36:07,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12490 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6088, Invalid=19352, Unknown=0, NotChecked=0, Total=25440 [2022-01-18 17:36:07,465 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1054 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:07,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 435 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:36:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2022-01-18 17:36:08,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 21369. [2022-01-18 17:36:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21369 states, 21368 states have (on average 3.9074784724822162) internal successors, (83495), 21368 states have internal predecessors, (83495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21369 states to 21369 states and 83495 transitions. [2022-01-18 17:36:08,308 INFO L78 Accepts]: Start accepts. Automaton has 21369 states and 83495 transitions. Word has length 30 [2022-01-18 17:36:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:08,308 INFO L470 AbstractCegarLoop]: Abstraction has 21369 states and 83495 transitions. [2022-01-18 17:36:08,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 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 17:36:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 21369 states and 83495 transitions. [2022-01-18 17:36:08,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:08,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:08,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:08,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:08,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:08,546 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1102478425, now seen corresponding path program 79 times [2022-01-18 17:36:08,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:08,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948343099] [2022-01-18 17:36:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:08,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:08,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948343099] [2022-01-18 17:36:08,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948343099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102125214] [2022-01-18 17:36:08,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:36:08,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:08,589 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:08,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 17:36:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:08,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:08,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:08,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102125214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:08,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:08,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-01-18 17:36:08,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588809500] [2022-01-18 17:36:08,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:08,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 17:36:08,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:08,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 17:36:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-01-18 17:36:08,870 INFO L87 Difference]: Start difference. First operand 21369 states and 83495 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:12,087 INFO L93 Difference]: Finished difference Result 49381 states and 176111 transitions. [2022-01-18 17:36:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-01-18 17:36:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:12,244 INFO L225 Difference]: With dead ends: 49381 [2022-01-18 17:36:12,244 INFO L226 Difference]: Without dead ends: 49381 [2022-01-18 17:36:12,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17447 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7299, Invalid=29757, Unknown=0, NotChecked=0, Total=37056 [2022-01-18 17:36:12,248 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 788 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:12,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 536 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:36:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49381 states. [2022-01-18 17:36:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49381 to 21351. [2022-01-18 17:36:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21351 states, 21350 states have (on average 3.906838407494145) internal successors, (83411), 21350 states have internal predecessors, (83411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21351 states to 21351 states and 83411 transitions. [2022-01-18 17:36:13,219 INFO L78 Accepts]: Start accepts. Automaton has 21351 states and 83411 transitions. Word has length 30 [2022-01-18 17:36:13,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:13,220 INFO L470 AbstractCegarLoop]: Abstraction has 21351 states and 83411 transitions. [2022-01-18 17:36:13,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 21351 states and 83411 transitions. [2022-01-18 17:36:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:13,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:13,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:13,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:13,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 17:36:13,459 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:13,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2072491833, now seen corresponding path program 80 times [2022-01-18 17:36:13,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:13,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695999643] [2022-01-18 17:36:13,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:13,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:13,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695999643] [2022-01-18 17:36:13,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695999643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555331401] [2022-01-18 17:36:13,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:36:13,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:13,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:13,504 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:13,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 17:36:13,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:13,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:13,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:13,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555331401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:13,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:13,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2022-01-18 17:36:13,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566041306] [2022-01-18 17:36:13,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:13,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:36:13,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:13,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:36:13,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:36:13,746 INFO L87 Difference]: Start difference. First operand 21351 states and 83411 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 17:36:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:15,623 INFO L93 Difference]: Finished difference Result 44753 states and 161002 transitions. [2022-01-18 17:36:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-18 17:36:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 30 [2022-01-18 17:36:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:15,753 INFO L225 Difference]: With dead ends: 44753 [2022-01-18 17:36:15,753 INFO L226 Difference]: Without dead ends: 44741 [2022-01-18 17:36:15,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3379, Invalid=12371, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 17:36:15,755 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 903 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:15,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 361 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:36:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44741 states. [2022-01-18 17:36:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44741 to 21357. [2022-01-18 17:36:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21357 states, 21356 states have (on average 3.90672410563776) internal successors, (83432), 21356 states have internal predecessors, (83432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21357 states to 21357 states and 83432 transitions. [2022-01-18 17:36:16,777 INFO L78 Accepts]: Start accepts. Automaton has 21357 states and 83432 transitions. Word has length 30 [2022-01-18 17:36:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:16,777 INFO L470 AbstractCegarLoop]: Abstraction has 21357 states and 83432 transitions. [2022-01-18 17:36:16,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 17:36:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 21357 states and 83432 transitions. [2022-01-18 17:36:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:16,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:16,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:16,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 17:36:17,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 17:36:17,043 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:17,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:17,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1951965771, now seen corresponding path program 81 times [2022-01-18 17:36:17,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:17,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122687431] [2022-01-18 17:36:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:17,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:17,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122687431] [2022-01-18 17:36:17,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122687431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:17,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841606946] [2022-01-18 17:36:17,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:36:17,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:17,083 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:17,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 17:36:17,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:36:17,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:36:17,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:17,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:36:17,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:36:17,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:36:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:36:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:36:17,587 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-01-18 17:36:17,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-01-18 17:36:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:36:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841606946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:17,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:17,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-01-18 17:36:17,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738167719] [2022-01-18 17:36:17,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:17,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:36:17,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:36:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:36:17,758 INFO L87 Difference]: Start difference. First operand 21357 states and 83432 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:27,874 INFO L93 Difference]: Finished difference Result 55083 states and 197153 transitions. [2022-01-18 17:36:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2022-01-18 17:36:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:28,046 INFO L225 Difference]: With dead ends: 55083 [2022-01-18 17:36:28,046 INFO L226 Difference]: Without dead ends: 55048 [2022-01-18 17:36:28,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42724 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=14090, Invalid=79240, Unknown=0, NotChecked=0, Total=93330 [2022-01-18 17:36:28,054 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1220 mSDsluCounter, 2203 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 4132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:28,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 1358 Invalid, 4132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 3518 Invalid, 0 Unknown, 347 Unchecked, 1.7s Time] [2022-01-18 17:36:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55048 states. [2022-01-18 17:36:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55048 to 23406. [2022-01-18 17:36:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23406 states, 23405 states have (on average 3.9390301217688526) internal successors, (92193), 23405 states have internal predecessors, (92193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23406 states to 23406 states and 92193 transitions. [2022-01-18 17:36:29,043 INFO L78 Accepts]: Start accepts. Automaton has 23406 states and 92193 transitions. Word has length 30 [2022-01-18 17:36:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:29,044 INFO L470 AbstractCegarLoop]: Abstraction has 23406 states and 92193 transitions. [2022-01-18 17:36:29,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23406 states and 92193 transitions. [2022-01-18 17:36:29,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:29,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:29,084 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:29,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:29,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:29,285 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:29,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1366937585, now seen corresponding path program 82 times [2022-01-18 17:36:29,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:29,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530823312] [2022-01-18 17:36:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:29,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:29,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:29,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530823312] [2022-01-18 17:36:29,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530823312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:29,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175658633] [2022-01-18 17:36:29,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:36:29,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:29,327 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:29,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 17:36:29,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:36:29,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:29,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:29,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:29,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175658633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:29,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:29,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:36:29,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661022746] [2022-01-18 17:36:29,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:29,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:36:29,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:36:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:36:29,579 INFO L87 Difference]: Start difference. First operand 23406 states and 92193 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:30,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:30,956 INFO L93 Difference]: Finished difference Result 50079 states and 185865 transitions. [2022-01-18 17:36:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 17:36:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:31,121 INFO L225 Difference]: With dead ends: 50079 [2022-01-18 17:36:31,121 INFO L226 Difference]: Without dead ends: 50043 [2022-01-18 17:36:31,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1775, Invalid=6781, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 17:36:31,122 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 582 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:31,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 323 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:36:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2022-01-18 17:36:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 24787. [2022-01-18 17:36:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24787 states, 24786 states have (on average 3.956507705963044) internal successors, (98066), 24786 states have internal predecessors, (98066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24787 states to 24787 states and 98066 transitions. [2022-01-18 17:36:32,191 INFO L78 Accepts]: Start accepts. Automaton has 24787 states and 98066 transitions. Word has length 30 [2022-01-18 17:36:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:32,191 INFO L470 AbstractCegarLoop]: Abstraction has 24787 states and 98066 transitions. [2022-01-18 17:36:32,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 24787 states and 98066 transitions. [2022-01-18 17:36:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:32,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:32,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:32,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:32,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:32,435 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1436024979, now seen corresponding path program 83 times [2022-01-18 17:36:32,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:32,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814531955] [2022-01-18 17:36:32,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:32,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:32,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814531955] [2022-01-18 17:36:32,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814531955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:32,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989704530] [2022-01-18 17:36:32,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:36:32,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:32,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:32,485 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:32,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 17:36:32,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:36:32,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:32,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:32,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:32,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989704530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:32,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:32,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:36:32,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875184581] [2022-01-18 17:36:32,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:32,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:36:32,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:36:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:36:32,710 INFO L87 Difference]: Start difference. First operand 24787 states and 98066 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:34,186 INFO L93 Difference]: Finished difference Result 51358 states and 189473 transitions. [2022-01-18 17:36:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 17:36:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:34,350 INFO L225 Difference]: With dead ends: 51358 [2022-01-18 17:36:34,350 INFO L226 Difference]: Without dead ends: 51346 [2022-01-18 17:36:34,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4015 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2125, Invalid=7975, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 17:36:34,351 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 638 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:34,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 328 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:36:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51346 states. [2022-01-18 17:36:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51346 to 24934. [2022-01-18 17:36:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24934 states, 24933 states have (on average 3.953114346448482) internal successors, (98563), 24933 states have internal predecessors, (98563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:35,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24934 states to 24934 states and 98563 transitions. [2022-01-18 17:36:35,519 INFO L78 Accepts]: Start accepts. Automaton has 24934 states and 98563 transitions. Word has length 30 [2022-01-18 17:36:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:35,520 INFO L470 AbstractCegarLoop]: Abstraction has 24934 states and 98563 transitions. [2022-01-18 17:36:35,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24934 states and 98563 transitions. [2022-01-18 17:36:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:35,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:35,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:35,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 17:36:35,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-01-18 17:36:35,764 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:35,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1588868973, now seen corresponding path program 84 times [2022-01-18 17:36:35,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:35,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789519865] [2022-01-18 17:36:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:35,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:35,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789519865] [2022-01-18 17:36:35,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789519865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192771952] [2022-01-18 17:36:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:35,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:35,820 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:35,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 17:36:35,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:36:35,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:35,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:35,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:35,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:36,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192771952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:36,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:36,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2022-01-18 17:36:36,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138541556] [2022-01-18 17:36:36,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:36,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 17:36:36,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 17:36:36,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-01-18 17:36:36,080 INFO L87 Difference]: Start difference. First operand 24934 states and 98563 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:37,808 INFO L93 Difference]: Finished difference Result 52042 states and 191452 transitions. [2022-01-18 17:36:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-18 17:36:37,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:37,974 INFO L225 Difference]: With dead ends: 52042 [2022-01-18 17:36:37,974 INFO L226 Difference]: Without dead ends: 52042 [2022-01-18 17:36:37,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5759 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2804, Invalid=10536, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 17:36:37,976 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 696 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:37,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 373 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:36:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52042 states. [2022-01-18 17:36:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52042 to 24804. [2022-01-18 17:36:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24804 states, 24803 states have (on average 3.9582308591702615) internal successors, (98176), 24803 states have internal predecessors, (98176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24804 states to 24804 states and 98176 transitions. [2022-01-18 17:36:39,142 INFO L78 Accepts]: Start accepts. Automaton has 24804 states and 98176 transitions. Word has length 30 [2022-01-18 17:36:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:39,142 INFO L470 AbstractCegarLoop]: Abstraction has 24804 states and 98176 transitions. [2022-01-18 17:36:39,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24804 states and 98176 transitions. [2022-01-18 17:36:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:39,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:39,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:39,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-18 17:36:39,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 17:36:39,392 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash -319949037, now seen corresponding path program 85 times [2022-01-18 17:36:39,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:39,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827281858] [2022-01-18 17:36:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:39,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:39,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:39,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827281858] [2022-01-18 17:36:39,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827281858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403764332] [2022-01-18 17:36:39,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:36:39,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:39,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:39,446 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:39,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 17:36:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:39,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:39,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:39,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403764332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:39,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:39,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:36:39,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684385060] [2022-01-18 17:36:39,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:39,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:36:39,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:39,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:36:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:36:39,667 INFO L87 Difference]: Start difference. First operand 24804 states and 98176 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:40,850 INFO L93 Difference]: Finished difference Result 43209 states and 161885 transitions. [2022-01-18 17:36:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 17:36:40,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-01-18 17:36:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:40,987 INFO L225 Difference]: With dead ends: 43209 [2022-01-18 17:36:40,987 INFO L226 Difference]: Without dead ends: 43173 [2022-01-18 17:36:40,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1236, Invalid=4770, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:36:40,988 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 626 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:40,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 264 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:36:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43173 states. [2022-01-18 17:36:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43173 to 24838. [2022-01-18 17:36:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24838 states, 24837 states have (on average 3.957523050287877) internal successors, (98293), 24837 states have internal predecessors, (98293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24838 states to 24838 states and 98293 transitions. [2022-01-18 17:36:41,998 INFO L78 Accepts]: Start accepts. Automaton has 24838 states and 98293 transitions. Word has length 30 [2022-01-18 17:36:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:41,998 INFO L470 AbstractCegarLoop]: Abstraction has 24838 states and 98293 transitions. [2022-01-18 17:36:41,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 24838 states and 98293 transitions. [2022-01-18 17:36:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:42,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:42,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:42,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 17:36:42,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 17:36:42,242 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash 382580375, now seen corresponding path program 86 times [2022-01-18 17:36:42,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:42,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161558768] [2022-01-18 17:36:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:42,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:42,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161558768] [2022-01-18 17:36:42,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161558768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625236037] [2022-01-18 17:36:42,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:36:42,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:42,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:42,284 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:42,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 17:36:42,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:42,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:42,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:42,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625236037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:42,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:42,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:36:42,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987234845] [2022-01-18 17:36:42,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:42,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:36:42,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:36:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:36:42,501 INFO L87 Difference]: Start difference. First operand 24838 states and 98293 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:43,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:43,577 INFO L93 Difference]: Finished difference Result 42696 states and 160691 transitions. [2022-01-18 17:36:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 17:36:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-01-18 17:36:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:43,714 INFO L225 Difference]: With dead ends: 42696 [2022-01-18 17:36:43,714 INFO L226 Difference]: Without dead ends: 42672 [2022-01-18 17:36:43,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1031, Invalid=3661, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:36:43,715 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 490 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 248 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:36:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42672 states. [2022-01-18 17:36:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42672 to 25046. [2022-01-18 17:36:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25046 states, 25045 states have (on average 3.9503693351966462) internal successors, (98937), 25045 states have internal predecessors, (98937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25046 states to 25046 states and 98937 transitions. [2022-01-18 17:36:44,672 INFO L78 Accepts]: Start accepts. Automaton has 25046 states and 98937 transitions. Word has length 30 [2022-01-18 17:36:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:44,673 INFO L470 AbstractCegarLoop]: Abstraction has 25046 states and 98937 transitions. [2022-01-18 17:36:44,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 25046 states and 98937 transitions. [2022-01-18 17:36:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:44,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:44,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:44,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:44,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 17:36:44,923 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:44,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1152351895, now seen corresponding path program 87 times [2022-01-18 17:36:44,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357411735] [2022-01-18 17:36:44,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:44,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:44,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:44,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357411735] [2022-01-18 17:36:44,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357411735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286044230] [2022-01-18 17:36:44,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:36:44,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:44,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:44,967 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:44,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 17:36:45,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:36:45,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:45,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286044230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:45,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:45,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:36:45,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331915007] [2022-01-18 17:36:45,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:45,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:36:45,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:36:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:36:45,193 INFO L87 Difference]: Start difference. First operand 25046 states and 98937 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:46,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:46,299 INFO L93 Difference]: Finished difference Result 43054 states and 161902 transitions. [2022-01-18 17:36:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 17:36:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-01-18 17:36:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:46,452 INFO L225 Difference]: With dead ends: 43054 [2022-01-18 17:36:46,452 INFO L226 Difference]: Without dead ends: 43046 [2022-01-18 17:36:46,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1074, Invalid=3756, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:36:46,452 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 482 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:46,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 272 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:36:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43046 states. [2022-01-18 17:36:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43046 to 27549. [2022-01-18 17:36:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27549 states, 27548 states have (on average 3.954152751560912) internal successors, (108929), 27548 states have internal predecessors, (108929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27549 states to 27549 states and 108929 transitions. [2022-01-18 17:36:47,481 INFO L78 Accepts]: Start accepts. Automaton has 27549 states and 108929 transitions. Word has length 30 [2022-01-18 17:36:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:47,481 INFO L470 AbstractCegarLoop]: Abstraction has 27549 states and 108929 transitions. [2022-01-18 17:36:47,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27549 states and 108929 transitions. [2022-01-18 17:36:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:47,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:47,534 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:36:47,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 17:36:47,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:47,735 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1422861587, now seen corresponding path program 88 times [2022-01-18 17:36:47,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24131199] [2022-01-18 17:36:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:47,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:47,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24131199] [2022-01-18 17:36:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24131199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302395200] [2022-01-18 17:36:47,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:36:47,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:47,776 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:47,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 17:36:47,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:36:47,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:47,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:47,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:47,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:47,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302395200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:47,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:47,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 17:36:47,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667178692] [2022-01-18 17:36:47,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:47,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 17:36:47,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 17:36:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-01-18 17:36:47,992 INFO L87 Difference]: Start difference. First operand 27549 states and 108929 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:49,281 INFO L93 Difference]: Finished difference Result 43663 states and 163665 transitions. [2022-01-18 17:36:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 17:36:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 30 [2022-01-18 17:36:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:49,427 INFO L225 Difference]: With dead ends: 43663 [2022-01-18 17:36:49,427 INFO L226 Difference]: Without dead ends: 43663 [2022-01-18 17:36:49,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2568 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1452, Invalid=5190, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:36:49,427 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 600 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:49,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 312 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:36:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43663 states. [2022-01-18 17:36:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43663 to 27467. [2022-01-18 17:36:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27467 states, 27466 states have (on average 3.9571106094808126) internal successors, (108686), 27466 states have internal predecessors, (108686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27467 states to 27467 states and 108686 transitions. [2022-01-18 17:36:50,419 INFO L78 Accepts]: Start accepts. Automaton has 27467 states and 108686 transitions. Word has length 30 [2022-01-18 17:36:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:50,419 INFO L470 AbstractCegarLoop]: Abstraction has 27467 states and 108686 transitions. [2022-01-18 17:36:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 17:36:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27467 states and 108686 transitions. [2022-01-18 17:36:50,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:50,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:50,480 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] [2022-01-18 17:36:50,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:50,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:50,681 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:50,681 INFO L85 PathProgramCache]: Analyzing trace with hash 18202575, now seen corresponding path program 27 times [2022-01-18 17:36:50,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:50,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209356916] [2022-01-18 17:36:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:50,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:50,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209356916] [2022-01-18 17:36:50,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209356916] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90738796] [2022-01-18 17:36:50,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:36:50,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:50,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:50,843 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:50,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 17:36:50,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:36:50,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:50,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:36:50,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:51,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:36:51,072 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:36:51,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:36:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:36:51,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:51,244 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:36:51,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:36:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:36:51,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90738796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:51,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:51,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-01-18 17:36:51,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472230395] [2022-01-18 17:36:51,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:51,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:36:51,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:36:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:36:51,484 INFO L87 Difference]: Start difference. First operand 27467 states and 108686 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:53,415 INFO L93 Difference]: Finished difference Result 44321 states and 168181 transitions. [2022-01-18 17:36:53,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 17:36:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:53,574 INFO L225 Difference]: With dead ends: 44321 [2022-01-18 17:36:53,574 INFO L226 Difference]: Without dead ends: 44315 [2022-01-18 17:36:53,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1140, Invalid=6516, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 17:36:53,575 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 417 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:53,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 667 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 992 Invalid, 0 Unknown, 642 Unchecked, 0.4s Time] [2022-01-18 17:36:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44315 states. [2022-01-18 17:36:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44315 to 27675. [2022-01-18 17:36:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27675 states, 27674 states have (on average 3.9484353544843533) internal successors, (109269), 27674 states have internal predecessors, (109269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27675 states to 27675 states and 109269 transitions. [2022-01-18 17:36:54,414 INFO L78 Accepts]: Start accepts. Automaton has 27675 states and 109269 transitions. Word has length 30 [2022-01-18 17:36:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:54,414 INFO L470 AbstractCegarLoop]: Abstraction has 27675 states and 109269 transitions. [2022-01-18 17:36:54,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 27675 states and 109269 transitions. [2022-01-18 17:36:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:54,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:54,468 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] [2022-01-18 17:36:54,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:54,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 17:36:54,668 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1450322577, now seen corresponding path program 28 times [2022-01-18 17:36:54,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156637008] [2022-01-18 17:36:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:54,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:54,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156637008] [2022-01-18 17:36:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156637008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798852207] [2022-01-18 17:36:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:36:54,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:54,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:54,709 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:54,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 17:36:54,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:36:54,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:54,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:54,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798852207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:54,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:54,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-01-18 17:36:54,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710339323] [2022-01-18 17:36:54,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:54,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 17:36:54,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:54,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 17:36:54,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 17:36:54,885 INFO L87 Difference]: Start difference. First operand 27675 states and 109269 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:55,620 INFO L93 Difference]: Finished difference Result 37644 states and 144252 transitions. [2022-01-18 17:36:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:36:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:55,735 INFO L225 Difference]: With dead ends: 37644 [2022-01-18 17:36:55,735 INFO L226 Difference]: Without dead ends: 37644 [2022-01-18 17:36:55,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:36:55,735 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 229 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:55,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 237 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:36:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37644 states. [2022-01-18 17:36:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37644 to 27701. [2022-01-18 17:36:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27701 states, 27700 states have (on average 3.947509025270758) internal successors, (109346), 27700 states have internal predecessors, (109346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27701 states to 27701 states and 109346 transitions. [2022-01-18 17:36:56,618 INFO L78 Accepts]: Start accepts. Automaton has 27701 states and 109346 transitions. Word has length 30 [2022-01-18 17:36:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:56,618 INFO L470 AbstractCegarLoop]: Abstraction has 27701 states and 109346 transitions. [2022-01-18 17:36:56,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 27701 states and 109346 transitions. [2022-01-18 17:36:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:56,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:56,679 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] [2022-01-18 17:36:56,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:56,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:56,879 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash -879017091, now seen corresponding path program 29 times [2022-01-18 17:36:56,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922289642] [2022-01-18 17:36:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:56,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:56,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922289642] [2022-01-18 17:36:56,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922289642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338498689] [2022-01-18 17:36:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:36:56,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:56,925 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:56,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 17:36:56,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-18 17:36:56,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:56,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:57,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:57,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338498689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:57,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:57,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 17:36:57,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653839561] [2022-01-18 17:36:57,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:57,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 17:36:57,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 17:36:57,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-18 17:36:57,110 INFO L87 Difference]: Start difference. First operand 27701 states and 109346 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:57,591 INFO L93 Difference]: Finished difference Result 37210 states and 143165 transitions. [2022-01-18 17:36:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:36:57,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:57,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:57,709 INFO L225 Difference]: With dead ends: 37210 [2022-01-18 17:36:57,709 INFO L226 Difference]: Without dead ends: 37206 [2022-01-18 17:36:57,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:36:57,710 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:57,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 129 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:36:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37206 states. [2022-01-18 17:36:58,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37206 to 27701. [2022-01-18 17:36:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27701 states, 27700 states have (on average 3.947436823104693) internal successors, (109344), 27700 states have internal predecessors, (109344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27701 states to 27701 states and 109344 transitions. [2022-01-18 17:36:58,562 INFO L78 Accepts]: Start accepts. Automaton has 27701 states and 109344 transitions. Word has length 30 [2022-01-18 17:36:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 27701 states and 109344 transitions. [2022-01-18 17:36:58,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 27701 states and 109344 transitions. [2022-01-18 17:36:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:58,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:58,616 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] [2022-01-18 17:36:58,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 17:36:58,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:58,816 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:36:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1727886413, now seen corresponding path program 30 times [2022-01-18 17:36:58,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:58,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055151569] [2022-01-18 17:36:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:58,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:58,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:58,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055151569] [2022-01-18 17:36:58,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055151569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:58,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373990761] [2022-01-18 17:36:58,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:58,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:58,851 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:36:58,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 17:36:58,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-18 17:36:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:58,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:36:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:58,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373990761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:59,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:59,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-01-18 17:36:59,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907754111] [2022-01-18 17:36:59,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:59,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 17:36:59,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 17:36:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-18 17:36:59,023 INFO L87 Difference]: Start difference. First operand 27701 states and 109344 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:59,620 INFO L93 Difference]: Finished difference Result 37382 states and 143633 transitions. [2022-01-18 17:36:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:36:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:59,760 INFO L225 Difference]: With dead ends: 37382 [2022-01-18 17:36:59,760 INFO L226 Difference]: Without dead ends: 37370 [2022-01-18 17:36:59,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:36:59,761 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 215 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:59,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 145 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:36:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37370 states. [2022-01-18 17:37:00,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37370 to 27817. [2022-01-18 17:37:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27817 states, 27816 states have (on average 3.9433419614610297) internal successors, (109688), 27816 states have internal predecessors, (109688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27817 states to 27817 states and 109688 transitions. [2022-01-18 17:37:00,579 INFO L78 Accepts]: Start accepts. Automaton has 27817 states and 109688 transitions. Word has length 30 [2022-01-18 17:37:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:00,579 INFO L470 AbstractCegarLoop]: Abstraction has 27817 states and 109688 transitions. [2022-01-18 17:37:00,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27817 states and 109688 transitions. [2022-01-18 17:37:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:00,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:00,638 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:37:00,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-01-18 17:37:00,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 17:37:00,839 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash 54707119, now seen corresponding path program 89 times [2022-01-18 17:37:00,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:00,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187624865] [2022-01-18 17:37:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:00,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:00,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187624865] [2022-01-18 17:37:00,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187624865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790485139] [2022-01-18 17:37:00,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:37:00,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:00,883 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:00,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 17:37:00,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:37:00,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:37:00,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:37:01,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790485139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:01,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 17:37:01,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538635163] [2022-01-18 17:37:01,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:01,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:37:01,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:37:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:37:01,156 INFO L87 Difference]: Start difference. First operand 27817 states and 109688 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 17:37:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:03,642 INFO L93 Difference]: Finished difference Result 44676 states and 163176 transitions. [2022-01-18 17:37:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-18 17:37:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 30 [2022-01-18 17:37:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:03,762 INFO L225 Difference]: With dead ends: 44676 [2022-01-18 17:37:03,762 INFO L226 Difference]: Without dead ends: 44676 [2022-01-18 17:37:03,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8340 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4131, Invalid=16461, Unknown=0, NotChecked=0, Total=20592 [2022-01-18 17:37:03,764 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 710 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:03,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 505 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44676 states. [2022-01-18 17:37:04,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44676 to 28023. [2022-01-18 17:37:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28023 states, 28022 states have (on average 3.935871815002498) internal successors, (110291), 28022 states have internal predecessors, (110291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28023 states to 28023 states and 110291 transitions. [2022-01-18 17:37:04,772 INFO L78 Accepts]: Start accepts. Automaton has 28023 states and 110291 transitions. Word has length 30 [2022-01-18 17:37:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:04,772 INFO L470 AbstractCegarLoop]: Abstraction has 28023 states and 110291 transitions. [2022-01-18 17:37:04,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 17:37:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 28023 states and 110291 transitions. [2022-01-18 17:37:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:04,825 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:04,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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 17:37:04,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 17:37:05,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:05,026 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1978483925, now seen corresponding path program 90 times [2022-01-18 17:37:05,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:05,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280018208] [2022-01-18 17:37:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:05,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:05,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280018208] [2022-01-18 17:37:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280018208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721424587] [2022-01-18 17:37:05,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:37:05,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:05,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:05,079 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:05,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 17:37:05,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:37:05,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 17:37:05,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:05,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 17:37:05,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721424587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:05,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:05,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 17:37:05,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903113277] [2022-01-18 17:37:05,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:05,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:37:05,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:37:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:37:05,377 INFO L87 Difference]: Start difference. First operand 28023 states and 110291 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:08,107 INFO L93 Difference]: Finished difference Result 52292 states and 190560 transitions. [2022-01-18 17:37:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-18 17:37:08,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:08,421 INFO L225 Difference]: With dead ends: 52292 [2022-01-18 17:37:08,421 INFO L226 Difference]: Without dead ends: 52292 [2022-01-18 17:37:08,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9910 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4480, Invalid=19390, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 17:37:08,422 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 699 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:08,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 513 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52292 states. [2022-01-18 17:37:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52292 to 27802. [2022-01-18 17:37:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27802 states, 27801 states have (on average 3.942987662314305) internal successors, (109619), 27801 states have internal predecessors, (109619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27802 states to 27802 states and 109619 transitions. [2022-01-18 17:37:09,475 INFO L78 Accepts]: Start accepts. Automaton has 27802 states and 109619 transitions. Word has length 30 [2022-01-18 17:37:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:09,475 INFO L470 AbstractCegarLoop]: Abstraction has 27802 states and 109619 transitions. [2022-01-18 17:37:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 27802 states and 109619 transitions. [2022-01-18 17:37:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:37:09,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:09,530 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] [2022-01-18 17:37:09,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 17:37:09,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:09,730 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 711634513, now seen corresponding path program 91 times [2022-01-18 17:37:09,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:09,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781961825] [2022-01-18 17:37:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:09,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:10,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781961825] [2022-01-18 17:37:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781961825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892454442] [2022-01-18 17:37:10,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:37:10,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:10,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:10,091 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:10,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 17:37:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:37:10,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:10,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:37:10,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:37:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:10,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:37:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:10,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:10,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:37:10,860 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-01-18 17:37:10,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-01-18 17:37:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:11,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892454442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:11,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:11,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 17:37:11,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3778090] [2022-01-18 17:37:11,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:11,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:37:11,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:11,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:37:11,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:37:11,214 INFO L87 Difference]: Start difference. First operand 27802 states and 109619 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:15,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:15,464 INFO L93 Difference]: Finished difference Result 36879 states and 140874 transitions. [2022-01-18 17:37:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 17:37:15,465 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:37:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:15,569 INFO L225 Difference]: With dead ends: 36879 [2022-01-18 17:37:15,569 INFO L226 Difference]: Without dead ends: 36616 [2022-01-18 17:37:15,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1832, Invalid=6910, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 17:37:15,570 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 841 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:15,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 384 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1382 Invalid, 0 Unknown, 215 Unchecked, 0.7s Time] [2022-01-18 17:37:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36616 states. [2022-01-18 17:37:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36616 to 27982. [2022-01-18 17:37:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27982 states, 27981 states have (on average 3.940352381973482) internal successors, (110255), 27981 states have internal predecessors, (110255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27982 states to 27982 states and 110255 transitions. [2022-01-18 17:37:16,272 INFO L78 Accepts]: Start accepts. Automaton has 27982 states and 110255 transitions. Word has length 32 [2022-01-18 17:37:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:16,272 INFO L470 AbstractCegarLoop]: Abstraction has 27982 states and 110255 transitions. [2022-01-18 17:37:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27982 states and 110255 transitions. [2022-01-18 17:37:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:37:16,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:16,326 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] [2022-01-18 17:37:16,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-18 17:37:16,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 17:37:16,526 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1875228809, now seen corresponding path program 92 times [2022-01-18 17:37:16,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417913377] [2022-01-18 17:37:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:16,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:17,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417913377] [2022-01-18 17:37:17,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417913377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509537221] [2022-01-18 17:37:17,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:37:17,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:17,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:17,022 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:17,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 17:37:17,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:37:17,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:17,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:37:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:17,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:37:17,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:17,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:37:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:17,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:37:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:17,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:17,621 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:37:17,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:37:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509537221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:17,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:17,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 17:37:17,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141003057] [2022-01-18 17:37:17,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:17,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:37:17,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:17,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:37:17,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:37:17,986 INFO L87 Difference]: Start difference. First operand 27982 states and 110255 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:23,751 INFO L93 Difference]: Finished difference Result 39522 states and 149006 transitions. [2022-01-18 17:37:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 17:37:23,751 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:37:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:23,922 INFO L225 Difference]: With dead ends: 39522 [2022-01-18 17:37:23,923 INFO L226 Difference]: Without dead ends: 39176 [2022-01-18 17:37:23,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3625 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2163, Invalid=8139, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 17:37:23,923 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 981 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:23,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 420 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1274 Invalid, 0 Unknown, 280 Unchecked, 0.8s Time] [2022-01-18 17:37:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39176 states. [2022-01-18 17:37:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39176 to 28043. [2022-01-18 17:37:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28043 states, 28042 states have (on average 3.940196847585764) internal successors, (110491), 28042 states have internal predecessors, (110491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:24,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28043 states to 28043 states and 110491 transitions. [2022-01-18 17:37:24,644 INFO L78 Accepts]: Start accepts. Automaton has 28043 states and 110491 transitions. Word has length 32 [2022-01-18 17:37:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:24,644 INFO L470 AbstractCegarLoop]: Abstraction has 28043 states and 110491 transitions. [2022-01-18 17:37:24,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28043 states and 110491 transitions. [2022-01-18 17:37:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:37:24,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:24,698 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] [2022-01-18 17:37:24,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 17:37:24,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:24,899 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 359458385, now seen corresponding path program 93 times [2022-01-18 17:37:24,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538699957] [2022-01-18 17:37:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:24,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:25,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538699957] [2022-01-18 17:37:25,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538699957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:25,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761841475] [2022-01-18 17:37:25,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:37:25,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:25,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:25,310 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:25,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 17:37:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:37:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:37:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:25,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:37:25,598 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-18 17:37:25,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:37:25,690 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-01-18 17:37:25,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:37:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:37:25,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:25,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:37:25,926 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:37:25,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:37:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 17:37:26,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761841475] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:26,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:26,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 33 [2022-01-18 17:37:26,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318836313] [2022-01-18 17:37:26,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:26,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:37:26,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:37:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:37:26,159 INFO L87 Difference]: Start difference. First operand 28043 states and 110491 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:39,877 INFO L93 Difference]: Finished difference Result 62877 states and 234181 transitions. [2022-01-18 17:37:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2022-01-18 17:37:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:37:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:40,194 INFO L225 Difference]: With dead ends: 62877 [2022-01-18 17:37:40,195 INFO L226 Difference]: Without dead ends: 62312 [2022-01-18 17:37:40,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20796 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=5172, Invalid=44780, Unknown=0, NotChecked=0, Total=49952 [2022-01-18 17:37:40,196 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1607 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1452 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:40,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 881 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1886 Invalid, 0 Unknown, 1452 Unchecked, 1.3s Time] [2022-01-18 17:37:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62312 states. [2022-01-18 17:37:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62312 to 29543. [2022-01-18 17:37:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29543 states, 29542 states have (on average 3.9225509444181164) internal successors, (115880), 29542 states have internal predecessors, (115880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29543 states to 29543 states and 115880 transitions. [2022-01-18 17:37:41,235 INFO L78 Accepts]: Start accepts. Automaton has 29543 states and 115880 transitions. Word has length 32 [2022-01-18 17:37:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:41,235 INFO L470 AbstractCegarLoop]: Abstraction has 29543 states and 115880 transitions. [2022-01-18 17:37:41,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29543 states and 115880 transitions. [2022-01-18 17:37:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:37:41,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:41,293 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] [2022-01-18 17:37:41,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 17:37:41,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 17:37:41,494 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1371311347, now seen corresponding path program 94 times [2022-01-18 17:37:41,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:41,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108072928] [2022-01-18 17:37:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:41,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:41,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:41,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108072928] [2022-01-18 17:37:41,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108072928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919921579] [2022-01-18 17:37:41,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:37:41,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:41,847 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:41,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 17:37:41,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:37:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:37:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:42,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:37:42,188 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:37:42,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:37:42,288 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-01-18 17:37:42,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:37:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:42,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:42,602 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-01-18 17:37:42,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:37:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:43,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919921579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:43,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:43,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 17:37:43,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851067564] [2022-01-18 17:37:43,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:43,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:37:43,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:37:43,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:37:43,005 INFO L87 Difference]: Start difference. First operand 29543 states and 115880 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:48,476 INFO L93 Difference]: Finished difference Result 38388 states and 146336 transitions. [2022-01-18 17:37:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 17:37:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:37:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:48,585 INFO L225 Difference]: With dead ends: 38388 [2022-01-18 17:37:48,585 INFO L226 Difference]: Without dead ends: 38273 [2022-01-18 17:37:48,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4424 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2049, Invalid=11993, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 17:37:48,587 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 653 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:48,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 595 Invalid, 2305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1575 Invalid, 0 Unknown, 584 Unchecked, 0.8s Time] [2022-01-18 17:37:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38273 states. [2022-01-18 17:37:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38273 to 29659. [2022-01-18 17:37:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29659 states, 29658 states have (on average 3.919751837615483) internal successors, (116252), 29658 states have internal predecessors, (116252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29659 states to 29659 states and 116252 transitions. [2022-01-18 17:37:49,310 INFO L78 Accepts]: Start accepts. Automaton has 29659 states and 116252 transitions. Word has length 32 [2022-01-18 17:37:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:49,310 INFO L470 AbstractCegarLoop]: Abstraction has 29659 states and 116252 transitions. [2022-01-18 17:37:49,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 29659 states and 116252 transitions. [2022-01-18 17:37:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:37:49,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:49,459 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:49,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-01-18 17:37:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 17:37:49,660 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1785520251, now seen corresponding path program 31 times [2022-01-18 17:37:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:49,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379728240] [2022-01-18 17:37:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:49,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:50,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379728240] [2022-01-18 17:37:50,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379728240] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797797484] [2022-01-18 17:37:50,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:37:50,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:50,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:50,041 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:50,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 17:37:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:50,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:37:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:50,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:37:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:50,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 17:37:50,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:50,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:50,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:50,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-01-18 17:37:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:50,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:50,622 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-01-18 17:37:50,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 17:37:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797797484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:50,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-01-18 17:37:50,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225224249] [2022-01-18 17:37:50,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:50,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:37:50,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:37:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:37:50,967 INFO L87 Difference]: Start difference. First operand 29659 states and 116252 transitions. Second operand has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:55,676 INFO L93 Difference]: Finished difference Result 49841 states and 188499 transitions. [2022-01-18 17:37:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 17:37:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:37:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:55,837 INFO L225 Difference]: With dead ends: 49841 [2022-01-18 17:37:55,837 INFO L226 Difference]: Without dead ends: 49694 [2022-01-18 17:37:55,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1850, Invalid=11490, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 17:37:55,838 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 565 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1946 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:55,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 458 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1946 Invalid, 0 Unknown, 87 Unchecked, 0.9s Time] [2022-01-18 17:37:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49694 states. [2022-01-18 17:37:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49694 to 29815. [2022-01-18 17:37:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29815 states, 29814 states have (on average 3.91373180385054) internal successors, (116684), 29814 states have internal predecessors, (116684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29815 states to 29815 states and 116684 transitions. [2022-01-18 17:37:56,833 INFO L78 Accepts]: Start accepts. Automaton has 29815 states and 116684 transitions. Word has length 32 [2022-01-18 17:37:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:56,833 INFO L470 AbstractCegarLoop]: Abstraction has 29815 states and 116684 transitions. [2022-01-18 17:37:56,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.175) internal successors, (87), 39 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29815 states and 116684 transitions. [2022-01-18 17:37:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:37:56,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:56,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:56,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 17:37:57,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 17:37:57,095 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:37:57,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash 821200773, now seen corresponding path program 32 times [2022-01-18 17:37:57,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:57,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321441985] [2022-01-18 17:37:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:57,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:57,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321441985] [2022-01-18 17:37:57,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321441985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212804373] [2022-01-18 17:37:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:37:57,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:57,464 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:37:57,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 17:37:57,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:37:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:37:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:57,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:37:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:57,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 17:37:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:37:57,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-01-18 17:37:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:57,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:58,066 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-01-18 17:37:58,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 17:37:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:58,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212804373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:58,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:58,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-01-18 17:37:58,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463387185] [2022-01-18 17:37:58,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:58,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 17:37:58,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 17:37:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:37:58,379 INFO L87 Difference]: Start difference. First operand 29815 states and 116684 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:06,534 INFO L93 Difference]: Finished difference Result 50727 states and 190959 transitions. [2022-01-18 17:38:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-18 17:38:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:38:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:06,697 INFO L225 Difference]: With dead ends: 50727 [2022-01-18 17:38:06,697 INFO L226 Difference]: Without dead ends: 50618 [2022-01-18 17:38:06,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8748 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3166, Invalid=21956, Unknown=0, NotChecked=0, Total=25122 [2022-01-18 17:38:06,698 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 642 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 3253 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 3518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 3253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:06,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 751 Invalid, 3518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 3253 Invalid, 0 Unknown, 92 Unchecked, 1.4s Time] [2022-01-18 17:38:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50618 states. [2022-01-18 17:38:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50618 to 29913. [2022-01-18 17:38:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29913 states, 29912 states have (on average 3.9116073816528485) internal successors, (117004), 29912 states have internal predecessors, (117004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29913 states to 29913 states and 117004 transitions. [2022-01-18 17:38:07,640 INFO L78 Accepts]: Start accepts. Automaton has 29913 states and 117004 transitions. Word has length 32 [2022-01-18 17:38:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:07,640 INFO L470 AbstractCegarLoop]: Abstraction has 29913 states and 117004 transitions. [2022-01-18 17:38:07,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 29913 states and 117004 transitions. [2022-01-18 17:38:07,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:07,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:07,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:07,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 17:38:07,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:07,898 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:07,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1118337783, now seen corresponding path program 33 times [2022-01-18 17:38:07,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:07,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166512098] [2022-01-18 17:38:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:07,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:08,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:08,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166512098] [2022-01-18 17:38:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166512098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663773833] [2022-01-18 17:38:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:08,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:08,287 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:08,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 17:38:08,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 17:38:08,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:38:08,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:08,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:38:08,567 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:38:08,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:38:08,728 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:38:08,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:38:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 17:38:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:09,044 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:38:09,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:38:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 17:38:09,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663773833] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:09,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:09,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-01-18 17:38:09,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714230790] [2022-01-18 17:38:09,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:09,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 17:38:09,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:09,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 17:38:09,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-01-18 17:38:09,287 INFO L87 Difference]: Start difference. First operand 29913 states and 117004 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 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 17:38:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:12,823 INFO L93 Difference]: Finished difference Result 70378 states and 273867 transitions. [2022-01-18 17:38:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 17:38:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 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 32 [2022-01-18 17:38:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:13,264 INFO L225 Difference]: With dead ends: 70378 [2022-01-18 17:38:13,264 INFO L226 Difference]: Without dead ends: 70242 [2022-01-18 17:38:13,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3095 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1639, Invalid=7481, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 17:38:13,265 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 485 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1431 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:13,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 402 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1109 Invalid, 0 Unknown, 1431 Unchecked, 0.5s Time] [2022-01-18 17:38:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70242 states. [2022-01-18 17:38:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70242 to 30700. [2022-01-18 17:38:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30700 states, 30699 states have (on average 3.8947848464119352) internal successors, (119566), 30699 states have internal predecessors, (119566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30700 states to 30700 states and 119566 transitions. [2022-01-18 17:38:14,354 INFO L78 Accepts]: Start accepts. Automaton has 30700 states and 119566 transitions. Word has length 32 [2022-01-18 17:38:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:14,354 INFO L470 AbstractCegarLoop]: Abstraction has 30700 states and 119566 transitions. [2022-01-18 17:38:14,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 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 17:38:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 30700 states and 119566 transitions. [2022-01-18 17:38:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:14,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:14,414 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] [2022-01-18 17:38:14,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 17:38:14,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:14,616 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2101897271, now seen corresponding path program 95 times [2022-01-18 17:38:14,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670117120] [2022-01-18 17:38:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:14,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:15,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670117120] [2022-01-18 17:38:15,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670117120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739563861] [2022-01-18 17:38:15,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:38:15,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:15,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:15,006 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:15,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 17:38:15,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:38:15,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:15,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-18 17:38:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:15,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:38:15,301 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-18 17:38:15,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:38:15,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:15,422 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-01-18 17:38:15,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-01-18 17:38:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:15,684 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:38:15,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:38:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739563861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:15,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:15,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-01-18 17:38:15,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704073390] [2022-01-18 17:38:15,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:15,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:38:15,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:38:15,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:38:15,971 INFO L87 Difference]: Start difference. First operand 30700 states and 119566 transitions. Second operand has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:27,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:27,171 INFO L93 Difference]: Finished difference Result 49606 states and 183648 transitions. [2022-01-18 17:38:27,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-18 17:38:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:38:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:27,318 INFO L225 Difference]: With dead ends: 49606 [2022-01-18 17:38:27,318 INFO L226 Difference]: Without dead ends: 49138 [2022-01-18 17:38:27,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13021 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4134, Invalid=29172, Unknown=0, NotChecked=0, Total=33306 [2022-01-18 17:38:27,320 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1154 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 2055 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1009 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:27,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 980 Invalid, 3385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2055 Invalid, 0 Unknown, 1009 Unchecked, 1.1s Time] [2022-01-18 17:38:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49138 states. [2022-01-18 17:38:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49138 to 31406. [2022-01-18 17:38:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31406 states, 31405 states have (on average 3.8996656583346603) internal successors, (122469), 31405 states have internal predecessors, (122469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31406 states to 31406 states and 122469 transitions. [2022-01-18 17:38:28,441 INFO L78 Accepts]: Start accepts. Automaton has 31406 states and 122469 transitions. Word has length 32 [2022-01-18 17:38:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:28,441 INFO L470 AbstractCegarLoop]: Abstraction has 31406 states and 122469 transitions. [2022-01-18 17:38:28,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 37 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31406 states and 122469 transitions. [2022-01-18 17:38:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:28,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:28,503 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] [2022-01-18 17:38:28,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 17:38:28,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 17:38:28,704 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1716388341, now seen corresponding path program 96 times [2022-01-18 17:38:28,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:28,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051694048] [2022-01-18 17:38:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:28,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:29,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:29,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051694048] [2022-01-18 17:38:29,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051694048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:29,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008174140] [2022-01-18 17:38:29,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:38:29,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:29,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:29,052 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:29,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 17:38:29,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:38:29,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:38:29,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:29,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:38:29,305 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:38:29,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:38:29,400 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:38:29,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:38:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 17:38:29,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:29,687 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:38:29,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:38:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-18 17:38:30,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008174140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:30,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:30,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-01-18 17:38:30,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081599969] [2022-01-18 17:38:30,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:30,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:38:30,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:38:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:38:30,012 INFO L87 Difference]: Start difference. First operand 31406 states and 122469 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:32,347 INFO L93 Difference]: Finished difference Result 40271 states and 152289 transitions. [2022-01-18 17:38:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 17:38:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:38:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:32,463 INFO L225 Difference]: With dead ends: 40271 [2022-01-18 17:38:32,463 INFO L226 Difference]: Without dead ends: 40181 [2022-01-18 17:38:32,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=864, Invalid=4836, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:38:32,463 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 536 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:32,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 446 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 653 Invalid, 0 Unknown, 1174 Unchecked, 0.3s Time] [2022-01-18 17:38:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40181 states. [2022-01-18 17:38:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40181 to 32058. [2022-01-18 17:38:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32058 states, 32057 states have (on average 3.8911626165892006) internal successors, (124739), 32057 states have internal predecessors, (124739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32058 states to 32058 states and 124739 transitions. [2022-01-18 17:38:33,371 INFO L78 Accepts]: Start accepts. Automaton has 32058 states and 124739 transitions. Word has length 32 [2022-01-18 17:38:33,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:33,371 INFO L470 AbstractCegarLoop]: Abstraction has 32058 states and 124739 transitions. [2022-01-18 17:38:33,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:33,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32058 states and 124739 transitions. [2022-01-18 17:38:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:33,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:33,437 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] [2022-01-18 17:38:33,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-01-18 17:38:33,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-01-18 17:38:33,637 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash -882005515, now seen corresponding path program 97 times [2022-01-18 17:38:33,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:33,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105484337] [2022-01-18 17:38:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:33,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:33,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105484337] [2022-01-18 17:38:33,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105484337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:33,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54372467] [2022-01-18 17:38:33,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:38:33,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:33,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:33,987 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:33,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 17:38:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:38:34,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:34,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:38:34,341 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-18 17:38:34,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:38:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:34,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:38:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:34,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:34,593 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:38:34,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:38:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:34,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54372467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:34,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:34,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 17:38:34,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032736922] [2022-01-18 17:38:34,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:34,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:38:34,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:38:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:38:34,994 INFO L87 Difference]: Start difference. First operand 32058 states and 124739 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:38,905 INFO L93 Difference]: Finished difference Result 42967 states and 160976 transitions. [2022-01-18 17:38:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 17:38:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:38:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:39,025 INFO L225 Difference]: With dead ends: 42967 [2022-01-18 17:38:39,025 INFO L226 Difference]: Without dead ends: 42893 [2022-01-18 17:38:39,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1567, Invalid=7175, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 17:38:39,025 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 698 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:39,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 470 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1184 Invalid, 0 Unknown, 315 Unchecked, 0.6s Time] [2022-01-18 17:38:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42893 states. [2022-01-18 17:38:39,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42893 to 32213. [2022-01-18 17:38:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32213 states, 32212 states have (on average 3.886532969079846) internal successors, (125193), 32212 states have internal predecessors, (125193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32213 states to 32213 states and 125193 transitions. [2022-01-18 17:38:39,892 INFO L78 Accepts]: Start accepts. Automaton has 32213 states and 125193 transitions. Word has length 32 [2022-01-18 17:38:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:39,892 INFO L470 AbstractCegarLoop]: Abstraction has 32213 states and 125193 transitions. [2022-01-18 17:38:39,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32213 states and 125193 transitions. [2022-01-18 17:38:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:39,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:39,954 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] [2022-01-18 17:38:39,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 17:38:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:40,155 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1588284495, now seen corresponding path program 98 times [2022-01-18 17:38:40,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:40,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454367854] [2022-01-18 17:38:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:40,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:40,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:40,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454367854] [2022-01-18 17:38:40,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454367854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:40,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53698116] [2022-01-18 17:38:40,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:38:40,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:40,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:40,533 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:40,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 17:38:40,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:40,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:38:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:40,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:38:41,008 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-18 17:38:41,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:38:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:41,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:38:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:41,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:38:41,267 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:38:41,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:38:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:41,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53698116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:41,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:41,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 17:38:41,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134585654] [2022-01-18 17:38:41,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:41,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:38:41,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:38:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:38:41,646 INFO L87 Difference]: Start difference. First operand 32213 states and 125193 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:45,696 INFO L93 Difference]: Finished difference Result 43018 states and 161098 transitions. [2022-01-18 17:38:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 17:38:45,696 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:38:45,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:45,822 INFO L225 Difference]: With dead ends: 43018 [2022-01-18 17:38:45,822 INFO L226 Difference]: Without dead ends: 42912 [2022-01-18 17:38:45,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1717, Invalid=7403, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 17:38:45,823 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 715 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:45,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [715 Valid, 466 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1549 Invalid, 0 Unknown, 182 Unchecked, 0.8s Time] [2022-01-18 17:38:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42912 states. [2022-01-18 17:38:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42912 to 32162. [2022-01-18 17:38:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32162 states, 32161 states have (on average 3.887565685146606) internal successors, (125028), 32161 states have internal predecessors, (125028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32162 states to 32162 states and 125028 transitions. [2022-01-18 17:38:46,821 INFO L78 Accepts]: Start accepts. Automaton has 32162 states and 125028 transitions. Word has length 32 [2022-01-18 17:38:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:46,821 INFO L470 AbstractCegarLoop]: Abstraction has 32162 states and 125028 transitions. [2022-01-18 17:38:46,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 32162 states and 125028 transitions. [2022-01-18 17:38:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:46,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:46,883 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] [2022-01-18 17:38:46,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 17:38:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:47,099 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2096591479, now seen corresponding path program 99 times [2022-01-18 17:38:47,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:47,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863186006] [2022-01-18 17:38:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:47,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:47,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863186006] [2022-01-18 17:38:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863186006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:47,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859738645] [2022-01-18 17:38:47,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:47,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:47,449 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:47,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 17:38:47,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:38:47,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:38:47,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:47,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:38:47,745 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:38:47,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:38:47,844 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:38:47,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:38:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:38:47,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:48,147 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:38:48,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:38:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 17:38:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859738645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:48,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:48,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-01-18 17:38:48,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771773915] [2022-01-18 17:38:48,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 17:38:48,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 17:38:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:38:48,527 INFO L87 Difference]: Start difference. First operand 32162 states and 125028 transitions. Second operand has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:52,715 INFO L93 Difference]: Finished difference Result 51087 states and 189656 transitions. [2022-01-18 17:38:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-18 17:38:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:38:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:52,887 INFO L225 Difference]: With dead ends: 51087 [2022-01-18 17:38:52,887 INFO L226 Difference]: Without dead ends: 51041 [2022-01-18 17:38:52,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4348 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1764, Invalid=11576, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 17:38:52,888 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 684 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1797 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:52,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 571 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 873 Invalid, 0 Unknown, 1797 Unchecked, 0.6s Time] [2022-01-18 17:38:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51041 states. [2022-01-18 17:38:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51041 to 32917. [2022-01-18 17:38:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32917 states, 32916 states have (on average 3.8803013731923683) internal successors, (127724), 32916 states have internal predecessors, (127724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32917 states to 32917 states and 127724 transitions. [2022-01-18 17:38:53,844 INFO L78 Accepts]: Start accepts. Automaton has 32917 states and 127724 transitions. Word has length 32 [2022-01-18 17:38:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:53,844 INFO L470 AbstractCegarLoop]: Abstraction has 32917 states and 127724 transitions. [2022-01-18 17:38:53,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 36 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32917 states and 127724 transitions. [2022-01-18 17:38:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:38:53,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:53,908 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:53,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 17:38:54,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 17:38:54,111 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:38:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1339985849, now seen corresponding path program 34 times [2022-01-18 17:38:54,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:54,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861130119] [2022-01-18 17:38:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:54,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:54,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:54,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861130119] [2022-01-18 17:38:54,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861130119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:54,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451393175] [2022-01-18 17:38:54,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:38:54,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:54,693 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:38:54,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 17:38:54,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:38:54,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:54,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:38:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:55,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:38:55,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:55,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:38:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:38:55,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2022-01-18 17:38:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:55,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:55,326 INFO L353 Elim1Store]: treesize reduction 47, result has 23.0 percent of original size [2022-01-18 17:38:55,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 17:38:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451393175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:55,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:55,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-01-18 17:38:55,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780135839] [2022-01-18 17:38:55,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:55,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 17:38:55,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:55,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 17:38:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:38:55,635 INFO L87 Difference]: Start difference. First operand 32917 states and 127724 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:04,307 INFO L93 Difference]: Finished difference Result 55582 states and 207677 transitions. [2022-01-18 17:39:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-18 17:39:04,307 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:39:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:04,482 INFO L225 Difference]: With dead ends: 55582 [2022-01-18 17:39:04,482 INFO L226 Difference]: Without dead ends: 55484 [2022-01-18 17:39:04,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10943 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4217, Invalid=26233, Unknown=0, NotChecked=0, Total=30450 [2022-01-18 17:39:04,483 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 782 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:04,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 605 Invalid, 2899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 2554 Invalid, 0 Unknown, 118 Unchecked, 1.2s Time] [2022-01-18 17:39:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55484 states. [2022-01-18 17:39:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55484 to 32935. [2022-01-18 17:39:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32935 states, 32934 states have (on average 3.8810955243820975) internal successors, (127820), 32934 states have internal predecessors, (127820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32935 states to 32935 states and 127820 transitions. [2022-01-18 17:39:05,576 INFO L78 Accepts]: Start accepts. Automaton has 32935 states and 127820 transitions. Word has length 32 [2022-01-18 17:39:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:05,576 INFO L470 AbstractCegarLoop]: Abstraction has 32935 states and 127820 transitions. [2022-01-18 17:39:05,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32935 states and 127820 transitions. [2022-01-18 17:39:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:39:05,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:05,640 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] [2022-01-18 17:39:05,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 17:39:05,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 17:39:05,841 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:39:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:05,841 INFO L85 PathProgramCache]: Analyzing trace with hash 366106637, now seen corresponding path program 100 times [2022-01-18 17:39:05,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:05,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060505084] [2022-01-18 17:39:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:05,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:06,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:06,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060505084] [2022-01-18 17:39:06,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060505084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510395476] [2022-01-18 17:39:06,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:39:06,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:06,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:06,209 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:39:06,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 17:39:06,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:39:06,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:06,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:39:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:06,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:39:06,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:39:06,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:39:06,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:39:06,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:39:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:06,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:06,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:39:06,834 INFO L353 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2022-01-18 17:39:06,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 22 [2022-01-18 17:39:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:07,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510395476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:07,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:07,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 17:39:07,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651728331] [2022-01-18 17:39:07,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:07,163 INFO L87 Difference]: Start difference. First operand 32935 states and 127820 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:13,685 INFO L93 Difference]: Finished difference Result 42801 states and 159961 transitions. [2022-01-18 17:39:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-18 17:39:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:39:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:13,808 INFO L225 Difference]: With dead ends: 42801 [2022-01-18 17:39:13,808 INFO L226 Difference]: Without dead ends: 42466 [2022-01-18 17:39:13,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3264, Invalid=12992, Unknown=0, NotChecked=0, Total=16256 [2022-01-18 17:39:13,809 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 1308 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:13,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 427 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1540 Invalid, 0 Unknown, 168 Unchecked, 0.9s Time] [2022-01-18 17:39:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42466 states. [2022-01-18 17:39:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42466 to 33169. [2022-01-18 17:39:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33169 states, 33168 states have (on average 3.879492281717318) internal successors, (128675), 33168 states have internal predecessors, (128675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33169 states to 33169 states and 128675 transitions. [2022-01-18 17:39:14,672 INFO L78 Accepts]: Start accepts. Automaton has 33169 states and 128675 transitions. Word has length 32 [2022-01-18 17:39:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:14,672 INFO L470 AbstractCegarLoop]: Abstraction has 33169 states and 128675 transitions. [2022-01-18 17:39:14,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 33169 states and 128675 transitions. [2022-01-18 17:39:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:39:14,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:14,737 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] [2022-01-18 17:39:14,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 17:39:14,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 17:39:14,937 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:39:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:14,937 INFO L85 PathProgramCache]: Analyzing trace with hash -685972535, now seen corresponding path program 101 times [2022-01-18 17:39:14,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:14,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051111744] [2022-01-18 17:39:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:14,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:15,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051111744] [2022-01-18 17:39:15,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051111744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:15,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545572592] [2022-01-18 17:39:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:39:15,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:15,320 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:39:15,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 17:39:15,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:39:15,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:15,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:39:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:15,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:39:15,800 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-18 17:39:15,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:39:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:39:15,848 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-01-18 17:39:15,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-01-18 17:39:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:16,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:16,250 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-01-18 17:39:16,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:39:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:16,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545572592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:16,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:16,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-01-18 17:39:16,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020182568] [2022-01-18 17:39:16,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:16,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:39:16,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:39:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:39:16,511 INFO L87 Difference]: Start difference. First operand 33169 states and 128675 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:39,881 INFO L93 Difference]: Finished difference Result 91641 states and 338994 transitions. [2022-01-18 17:39:39,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-01-18 17:39:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:39:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:40,197 INFO L225 Difference]: With dead ends: 91641 [2022-01-18 17:39:40,197 INFO L226 Difference]: Without dead ends: 90983 [2022-01-18 17:39:40,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42460 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=9928, Invalid=86482, Unknown=0, NotChecked=0, Total=96410 [2022-01-18 17:39:40,201 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1668 mSDsluCounter, 2176 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 4856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2080 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:40,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1668 Valid, 1074 Invalid, 4856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 2430 Invalid, 0 Unknown, 2080 Unchecked, 1.6s Time] [2022-01-18 17:39:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90983 states. [2022-01-18 17:39:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90983 to 34783. [2022-01-18 17:39:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34783 states, 34782 states have (on average 3.8822379391639354) internal successors, (135032), 34782 states have internal predecessors, (135032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34783 states to 34783 states and 135032 transitions. [2022-01-18 17:39:41,964 INFO L78 Accepts]: Start accepts. Automaton has 34783 states and 135032 transitions. Word has length 32 [2022-01-18 17:39:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:41,964 INFO L470 AbstractCegarLoop]: Abstraction has 34783 states and 135032 transitions. [2022-01-18 17:39:41,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34783 states and 135032 transitions. [2022-01-18 17:39:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:39:42,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:42,032 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] [2022-01-18 17:39:42,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 17:39:42,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 17:39:42,232 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:39:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2010400627, now seen corresponding path program 102 times [2022-01-18 17:39:42,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:42,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987672466] [2022-01-18 17:39:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:42,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:42,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987672466] [2022-01-18 17:39:42,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987672466] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763475601] [2022-01-18 17:39:42,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:39:42,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:42,716 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:39:42,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 17:39:42,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:39:42,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:39:42,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:42,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:39:42,998 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-18 17:39:42,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:39:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:39:43,067 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-01-18 17:39:43,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-01-18 17:39:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:43,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:43,372 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:39:43,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:39:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:43,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763475601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:43,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:43,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 36 [2022-01-18 17:39:43,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400295062] [2022-01-18 17:39:43,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:43,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 17:39:43,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:43,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 17:39:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:39:43,596 INFO L87 Difference]: Start difference. First operand 34783 states and 135032 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 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 17:39:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:55,903 INFO L93 Difference]: Finished difference Result 64848 states and 238958 transitions. [2022-01-18 17:39:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-18 17:39:55,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 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 32 [2022-01-18 17:39:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:56,115 INFO L225 Difference]: With dead ends: 64848 [2022-01-18 17:39:56,115 INFO L226 Difference]: Without dead ends: 64717 [2022-01-18 17:39:56,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13417 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=3375, Invalid=31035, Unknown=0, NotChecked=0, Total=34410 [2022-01-18 17:39:56,116 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1024 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 4653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1198 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:56,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 1363 Invalid, 4653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 3223 Invalid, 0 Unknown, 1198 Unchecked, 1.6s Time] [2022-01-18 17:39:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64717 states. [2022-01-18 17:39:57,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64717 to 35391. [2022-01-18 17:39:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35391 states, 35390 states have (on average 3.882961288499576) internal successors, (137418), 35390 states have internal predecessors, (137418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:57,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35391 states to 35391 states and 137418 transitions. [2022-01-18 17:39:57,364 INFO L78 Accepts]: Start accepts. Automaton has 35391 states and 137418 transitions. Word has length 32 [2022-01-18 17:39:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:57,364 INFO L470 AbstractCegarLoop]: Abstraction has 35391 states and 137418 transitions. [2022-01-18 17:39:57,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 36 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 17:39:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 35391 states and 137418 transitions. [2022-01-18 17:39:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:39:57,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:57,433 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] [2022-01-18 17:39:57,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 17:39:57,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:57,634 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:39:57,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash 547803717, now seen corresponding path program 103 times [2022-01-18 17:39:57,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:57,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445889550] [2022-01-18 17:39:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:57,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:58,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445889550] [2022-01-18 17:39:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445889550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:58,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445003736] [2022-01-18 17:39:58,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:39:58,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:58,015 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:39:58,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 17:39:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:39:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:58,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:39:58,347 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-18 17:39:58,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:39:58,459 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-01-18 17:39:58,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:39:58,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:58,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:58,811 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:39:58,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:39:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445003736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:59,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 17:39:59,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351679573] [2022-01-18 17:39:59,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:59,147 INFO L87 Difference]: Start difference. First operand 35391 states and 137418 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:17,439 INFO L93 Difference]: Finished difference Result 51787 states and 191524 transitions. [2022-01-18 17:40:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-01-18 17:40:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:40:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:17,608 INFO L225 Difference]: With dead ends: 51787 [2022-01-18 17:40:17,608 INFO L226 Difference]: Without dead ends: 51476 [2022-01-18 17:40:17,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21081 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=6885, Invalid=44417, Unknown=0, NotChecked=0, Total=51302 [2022-01-18 17:40:17,611 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1314 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:17,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 665 Invalid, 3258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2315 Invalid, 0 Unknown, 579 Unchecked, 1.4s Time] [2022-01-18 17:40:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51476 states. [2022-01-18 17:40:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51476 to 35455. [2022-01-18 17:40:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35455 states, 35454 states have (on average 3.8850341287301857) internal successors, (137740), 35454 states have internal predecessors, (137740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35455 states to 35455 states and 137740 transitions. [2022-01-18 17:40:18,747 INFO L78 Accepts]: Start accepts. Automaton has 35455 states and 137740 transitions. Word has length 32 [2022-01-18 17:40:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:18,747 INFO L470 AbstractCegarLoop]: Abstraction has 35455 states and 137740 transitions. [2022-01-18 17:40:18,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 35455 states and 137740 transitions. [2022-01-18 17:40:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:40:18,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:18,817 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] [2022-01-18 17:40:18,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 17:40:19,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 17:40:19,018 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:40:19,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1291597695, now seen corresponding path program 104 times [2022-01-18 17:40:19,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:19,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242989331] [2022-01-18 17:40:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:19,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:19,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242989331] [2022-01-18 17:40:19,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242989331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91533607] [2022-01-18 17:40:19,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:40:19,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:19,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:19,423 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:40:19,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 17:40:19,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:19,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:19,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:40:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:19,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:40:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:40:19,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:40:19,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:40:19,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:40:19,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:40:19,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2022-01-18 17:40:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:19,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:20,119 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-01-18 17:40:20,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:40:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91533607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:20,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:20,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2022-01-18 17:40:20,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416370637] [2022-01-18 17:40:20,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:20,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:40:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:40:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:40:20,521 INFO L87 Difference]: Start difference. First operand 35455 states and 137740 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:57,134 INFO L93 Difference]: Finished difference Result 52844 states and 195507 transitions. [2022-01-18 17:40:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 382 states. [2022-01-18 17:40:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:40:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:57,303 INFO L225 Difference]: With dead ends: 52844 [2022-01-18 17:40:57,303 INFO L226 Difference]: Without dead ends: 52586 [2022-01-18 17:40:57,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70803 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=14658, Invalid=145742, Unknown=0, NotChecked=0, Total=160400 [2022-01-18 17:40:57,308 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 1925 mSDsluCounter, 2652 mSDsCounter, 0 mSdLazyCounter, 4933 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 5579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 4933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:57,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 1291 Invalid, 5579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 4933 Invalid, 0 Unknown, 111 Unchecked, 2.7s Time] [2022-01-18 17:40:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52586 states. [2022-01-18 17:40:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52586 to 36099. [2022-01-18 17:40:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36099 states, 36098 states have (on average 3.8800764585295586) internal successors, (140063), 36098 states have internal predecessors, (140063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36099 states to 36099 states and 140063 transitions. [2022-01-18 17:40:58,541 INFO L78 Accepts]: Start accepts. Automaton has 36099 states and 140063 transitions. Word has length 32 [2022-01-18 17:40:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:58,542 INFO L470 AbstractCegarLoop]: Abstraction has 36099 states and 140063 transitions. [2022-01-18 17:40:58,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 36099 states and 140063 transitions. [2022-01-18 17:40:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:40:58,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:58,614 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] [2022-01-18 17:40:58,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 17:40:58,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 17:40:58,814 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:40:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash -776819403, now seen corresponding path program 105 times [2022-01-18 17:40:58,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:58,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973090801] [2022-01-18 17:40:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:58,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:59,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:59,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973090801] [2022-01-18 17:40:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973090801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:59,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395589667] [2022-01-18 17:40:59,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:40:59,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:59,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:59,166 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:40:59,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 17:40:59,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:40:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:40:59,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:59,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:40:59,417 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:40:59,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:40:59,474 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:40:59,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:40:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:40:59,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:59,813 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:40:59,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:41:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:41:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395589667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:00,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:00,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-01-18 17:41:00,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956641958] [2022-01-18 17:41:00,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:00,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:41:00,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:41:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:41:00,096 INFO L87 Difference]: Start difference. First operand 36099 states and 140063 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:09,404 INFO L93 Difference]: Finished difference Result 102620 states and 385220 transitions. [2022-01-18 17:41:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-18 17:41:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:41:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:09,783 INFO L225 Difference]: With dead ends: 102620 [2022-01-18 17:41:09,783 INFO L226 Difference]: Without dead ends: 102242 [2022-01-18 17:41:09,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14408 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5681, Invalid=29101, Unknown=0, NotChecked=0, Total=34782 [2022-01-18 17:41:09,784 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1050 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 3436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1894 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:09,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 763 Invalid, 3436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1322 Invalid, 0 Unknown, 1894 Unchecked, 0.8s Time] [2022-01-18 17:41:10,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102242 states. [2022-01-18 17:41:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102242 to 38466. [2022-01-18 17:41:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38466 states, 38465 states have (on average 3.907344339009489) internal successors, (150296), 38465 states have internal predecessors, (150296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38466 states to 38466 states and 150296 transitions. [2022-01-18 17:41:11,825 INFO L78 Accepts]: Start accepts. Automaton has 38466 states and 150296 transitions. Word has length 32 [2022-01-18 17:41:11,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:11,825 INFO L470 AbstractCegarLoop]: Abstraction has 38466 states and 150296 transitions. [2022-01-18 17:41:11,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 38466 states and 150296 transitions. [2022-01-18 17:41:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:41:11,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:11,900 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] [2022-01-18 17:41:11,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 17:41:12,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:12,101 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:41:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash 304198069, now seen corresponding path program 106 times [2022-01-18 17:41:12,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:12,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603040408] [2022-01-18 17:41:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:12,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:12,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603040408] [2022-01-18 17:41:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603040408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681660093] [2022-01-18 17:41:12,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:41:12,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:12,488 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:41:12,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 17:41:12,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:41:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:41:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:12,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:41:13,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:13,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:41:13,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:13,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:41:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:13,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:13,291 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:41:13,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:41:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:13,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681660093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:13,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:13,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 17:41:13,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686787474] [2022-01-18 17:41:13,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:13,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:41:13,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:41:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:41:13,619 INFO L87 Difference]: Start difference. First operand 38466 states and 150296 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:25,830 INFO L93 Difference]: Finished difference Result 56723 states and 209267 transitions. [2022-01-18 17:41:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-18 17:41:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:41:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:26,013 INFO L225 Difference]: With dead ends: 56723 [2022-01-18 17:41:26,013 INFO L226 Difference]: Without dead ends: 56244 [2022-01-18 17:41:26,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11188 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=5132, Invalid=22590, Unknown=0, NotChecked=0, Total=27722 [2022-01-18 17:41:26,014 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1240 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:26,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 572 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2022 Invalid, 0 Unknown, 417 Unchecked, 1.3s Time] [2022-01-18 17:41:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56244 states. [2022-01-18 17:41:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56244 to 38432. [2022-01-18 17:41:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38432 states, 38431 states have (on average 3.9106190315110196) internal successors, (150289), 38431 states have internal predecessors, (150289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38432 states to 38432 states and 150289 transitions. [2022-01-18 17:41:27,165 INFO L78 Accepts]: Start accepts. Automaton has 38432 states and 150289 transitions. Word has length 32 [2022-01-18 17:41:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:27,165 INFO L470 AbstractCegarLoop]: Abstraction has 38432 states and 150289 transitions. [2022-01-18 17:41:27,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38432 states and 150289 transitions. [2022-01-18 17:41:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:41:27,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:27,240 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] [2022-01-18 17:41:27,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 17:41:27,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:27,441 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:41:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash -432199035, now seen corresponding path program 107 times [2022-01-18 17:41:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45075640] [2022-01-18 17:41:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:27,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:27,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:27,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45075640] [2022-01-18 17:41:27,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45075640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:27,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280136610] [2022-01-18 17:41:27,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:41:27,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:27,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:27,748 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:41:27,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 17:41:27,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:41:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:41:27,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:27,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:41:28,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:41:28,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:28,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:28,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:41:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:28,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:28,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:41:28,611 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:41:28,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:41:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280136610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:28,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:28,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 17:41:28,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439575338] [2022-01-18 17:41:28,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:28,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:41:28,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:41:28,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:41:28,955 INFO L87 Difference]: Start difference. First operand 38432 states and 150289 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:38,610 INFO L93 Difference]: Finished difference Result 52386 states and 197704 transitions. [2022-01-18 17:41:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 17:41:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:41:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:38,779 INFO L225 Difference]: With dead ends: 52386 [2022-01-18 17:41:38,779 INFO L226 Difference]: Without dead ends: 51723 [2022-01-18 17:41:38,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12292 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5432, Invalid=26074, Unknown=0, NotChecked=0, Total=31506 [2022-01-18 17:41:38,781 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1346 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:38,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 679 Invalid, 3510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2912 Invalid, 0 Unknown, 113 Unchecked, 1.6s Time] [2022-01-18 17:41:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51723 states. [2022-01-18 17:41:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51723 to 38501. [2022-01-18 17:41:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38501 states, 38500 states have (on average 3.9126233766233764) internal successors, (150636), 38500 states have internal predecessors, (150636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38501 states to 38501 states and 150636 transitions. [2022-01-18 17:41:39,937 INFO L78 Accepts]: Start accepts. Automaton has 38501 states and 150636 transitions. Word has length 32 [2022-01-18 17:41:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:39,937 INFO L470 AbstractCegarLoop]: Abstraction has 38501 states and 150636 transitions. [2022-01-18 17:41:39,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 38501 states and 150636 transitions. [2022-01-18 17:41:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:41:40,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:40,012 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] [2022-01-18 17:41:40,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-01-18 17:41:40,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:40,212 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:41:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1691205311, now seen corresponding path program 108 times [2022-01-18 17:41:40,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:40,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24338267] [2022-01-18 17:41:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:40,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:40,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24338267] [2022-01-18 17:41:40,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24338267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:40,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796326116] [2022-01-18 17:41:40,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:41:40,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:40,523 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:41:40,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 17:41:40,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 17:41:40,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 17:41:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:40,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:41:40,745 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:41:40,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:41:40,802 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:41:40,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:41:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:41:41,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:41,199 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:41:41,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:41:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:41:41,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796326116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:41,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:41,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 32 [2022-01-18 17:41:41,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551862885] [2022-01-18 17:41:41,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:41,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:41:41,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:41:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:41:41,478 INFO L87 Difference]: Start difference. First operand 38501 states and 150636 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:54,058 INFO L93 Difference]: Finished difference Result 137132 states and 508942 transitions. [2022-01-18 17:41:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-01-18 17:41:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:41:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:54,563 INFO L225 Difference]: With dead ends: 137132 [2022-01-18 17:41:54,563 INFO L226 Difference]: Without dead ends: 136805 [2022-01-18 17:41:54,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 79 SyntacticMatches, 39 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27049 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=8097, Invalid=50225, Unknown=0, NotChecked=0, Total=58322 [2022-01-18 17:41:54,565 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 971 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1541 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:54,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 953 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1920 Invalid, 0 Unknown, 1541 Unchecked, 1.0s Time] [2022-01-18 17:41:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136805 states. [2022-01-18 17:41:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136805 to 39413. [2022-01-18 17:41:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39413 states, 39412 states have (on average 3.917613924692987) internal successors, (154401), 39412 states have internal predecessors, (154401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39413 states to 39413 states and 154401 transitions. [2022-01-18 17:41:57,117 INFO L78 Accepts]: Start accepts. Automaton has 39413 states and 154401 transitions. Word has length 32 [2022-01-18 17:41:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:57,117 INFO L470 AbstractCegarLoop]: Abstraction has 39413 states and 154401 transitions. [2022-01-18 17:41:57,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 39413 states and 154401 transitions. [2022-01-18 17:41:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:41:57,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:57,197 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] [2022-01-18 17:41:57,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 17:41:57,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 17:41:57,398 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:41:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2091579829, now seen corresponding path program 109 times [2022-01-18 17:41:57,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:57,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539793525] [2022-01-18 17:41:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:57,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:57,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:57,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539793525] [2022-01-18 17:41:57,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539793525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:57,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061216789] [2022-01-18 17:41:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:41:57,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:57,766 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:41:57,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 17:41:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:41:57,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:58,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:41:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:58,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:41:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:58,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:41:58,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:41:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:58,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:58,430 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:41:58,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:41:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:58,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061216789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:58,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:58,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-01-18 17:41:58,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269351599] [2022-01-18 17:41:58,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:58,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 17:41:58,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 17:41:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:41:58,756 INFO L87 Difference]: Start difference. First operand 39413 states and 154401 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:11,244 INFO L93 Difference]: Finished difference Result 57731 states and 213688 transitions. [2022-01-18 17:42:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-18 17:42:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:42:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:11,550 INFO L225 Difference]: With dead ends: 57731 [2022-01-18 17:42:11,551 INFO L226 Difference]: Without dead ends: 57320 [2022-01-18 17:42:11,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=5415, Invalid=23315, Unknown=0, NotChecked=0, Total=28730 [2022-01-18 17:42:11,552 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 1111 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1383 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:11,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 636 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 1910 Invalid, 0 Unknown, 1383 Unchecked, 1.2s Time] [2022-01-18 17:42:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57320 states. [2022-01-18 17:42:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57320 to 39513. [2022-01-18 17:42:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39513 states, 39512 states have (on average 3.9168100830127557) internal successors, (154761), 39512 states have internal predecessors, (154761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39513 states to 39513 states and 154761 transitions. [2022-01-18 17:42:12,708 INFO L78 Accepts]: Start accepts. Automaton has 39513 states and 154761 transitions. Word has length 32 [2022-01-18 17:42:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:12,708 INFO L470 AbstractCegarLoop]: Abstraction has 39513 states and 154761 transitions. [2022-01-18 17:42:12,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 39513 states and 154761 transitions. [2022-01-18 17:42:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:42:12,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:12,786 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] [2022-01-18 17:42:12,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 17:42:12,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 17:42:12,986 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1876184123, now seen corresponding path program 110 times [2022-01-18 17:42:12,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:12,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580324056] [2022-01-18 17:42:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:12,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:13,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:13,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580324056] [2022-01-18 17:42:13,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580324056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:13,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571949346] [2022-01-18 17:42:13,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:13,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:13,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:13,283 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:42:13,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 17:42:13,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:13,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:42:13,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:13,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:42:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:13,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:42:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:13,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:42:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:13,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:13,927 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 17:42:13,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 26 [2022-01-18 17:42:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:14,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571949346] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:14,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:14,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2022-01-18 17:42:14,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382620415] [2022-01-18 17:42:14,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:14,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-18 17:42:14,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-18 17:42:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:42:14,251 INFO L87 Difference]: Start difference. First operand 39513 states and 154761 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:21,447 INFO L93 Difference]: Finished difference Result 55354 states and 208250 transitions. [2022-01-18 17:42:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-18 17:42:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:42:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:21,630 INFO L225 Difference]: With dead ends: 55354 [2022-01-18 17:42:21,630 INFO L226 Difference]: Without dead ends: 55210 [2022-01-18 17:42:21,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7906 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3892, Invalid=15290, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 17:42:21,632 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 965 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 3975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2044 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:21,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 627 Invalid, 3975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1581 Invalid, 0 Unknown, 2044 Unchecked, 1.0s Time] [2022-01-18 17:42:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55210 states. [2022-01-18 17:42:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55210 to 39510. [2022-01-18 17:42:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39510 states, 39509 states have (on average 3.917892125844744) internal successors, (154792), 39509 states have internal predecessors, (154792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:22,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39510 states to 39510 states and 154792 transitions. [2022-01-18 17:42:22,808 INFO L78 Accepts]: Start accepts. Automaton has 39510 states and 154792 transitions. Word has length 32 [2022-01-18 17:42:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:22,808 INFO L470 AbstractCegarLoop]: Abstraction has 39510 states and 154792 transitions. [2022-01-18 17:42:22,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:22,809 INFO L276 IsEmpty]: Start isEmpty. Operand 39510 states and 154792 transitions. [2022-01-18 17:42:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:42:22,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:22,881 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] [2022-01-18 17:42:22,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 17:42:23,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 17:42:23,082 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1870318149, now seen corresponding path program 111 times [2022-01-18 17:42:23,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:23,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857720707] [2022-01-18 17:42:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:23,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:23,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857720707] [2022-01-18 17:42:23,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857720707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910382601] [2022-01-18 17:42:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:23,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:23,618 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:42:23,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 17:42:23,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:42:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 17:42:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:23,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 17:42:23,840 INFO L353 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2022-01-18 17:42:23,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:42:23,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:23,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:23,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:42:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:42:24,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:42:24,212 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:42:24,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:42:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:42:24,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910382601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:24,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:24,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 34 [2022-01-18 17:42:24,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270651168] [2022-01-18 17:42:24,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:24,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:42:24,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:24,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:42:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:42:24,438 INFO L87 Difference]: Start difference. First operand 39510 states and 154792 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:44,628 INFO L93 Difference]: Finished difference Result 64931 states and 242817 transitions. [2022-01-18 17:42:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-01-18 17:42:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:42:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:44,840 INFO L225 Difference]: With dead ends: 64931 [2022-01-18 17:42:44,840 INFO L226 Difference]: Without dead ends: 64244 [2022-01-18 17:42:44,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34251 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=9447, Invalid=68115, Unknown=0, NotChecked=0, Total=77562 [2022-01-18 17:42:44,844 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1991 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1991 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:44,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1991 Valid, 612 Invalid, 3482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 2475 Invalid, 0 Unknown, 222 Unchecked, 1.7s Time] [2022-01-18 17:42:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64244 states. [2022-01-18 17:42:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64244 to 42777. [2022-01-18 17:42:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42777 states, 42776 states have (on average 3.9228305591920702) internal successors, (167803), 42776 states have internal predecessors, (167803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42777 states to 42777 states and 167803 transitions. [2022-01-18 17:42:46,183 INFO L78 Accepts]: Start accepts. Automaton has 42777 states and 167803 transitions. Word has length 32 [2022-01-18 17:42:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:46,183 INFO L470 AbstractCegarLoop]: Abstraction has 42777 states and 167803 transitions. [2022-01-18 17:42:46,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42777 states and 167803 transitions. [2022-01-18 17:42:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:42:46,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:46,269 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] [2022-01-18 17:42:46,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 17:42:46,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:46,469 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:46,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash 608356609, now seen corresponding path program 112 times [2022-01-18 17:42:46,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:46,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839533661] [2022-01-18 17:42:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:46,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:46,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839533661] [2022-01-18 17:42:46,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839533661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:46,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797275968] [2022-01-18 17:42:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:46,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:46,749 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:42:46,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 17:42:46,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:46,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:42:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:47,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:42:47,079 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:42:47,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:42:47,133 INFO L353 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-01-18 17:42:47,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:42:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:47,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:47,436 INFO L353 Elim1Store]: treesize reduction 25, result has 54.5 percent of original size [2022-01-18 17:42:47,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:42:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797275968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:47,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:47,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-01-18 17:42:47,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769669691] [2022-01-18 17:42:47,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:47,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:42:47,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:47,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:42:47,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:42:47,775 INFO L87 Difference]: Start difference. First operand 42777 states and 167803 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:55,174 INFO L93 Difference]: Finished difference Result 74886 states and 285697 transitions. [2022-01-18 17:42:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-18 17:42:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:42:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:55,409 INFO L225 Difference]: With dead ends: 74886 [2022-01-18 17:42:55,409 INFO L226 Difference]: Without dead ends: 74740 [2022-01-18 17:42:55,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9652 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4568, Invalid=19612, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 17:42:55,410 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1141 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1592 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:55,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 653 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1247 Invalid, 0 Unknown, 1592 Unchecked, 0.7s Time] [2022-01-18 17:42:55,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74740 states. [2022-01-18 17:42:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74740 to 42745. [2022-01-18 17:42:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42745 states, 42744 states have (on average 3.922842972113045) internal successors, (167678), 42744 states have internal predecessors, (167678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42745 states to 42745 states and 167678 transitions. [2022-01-18 17:42:56,871 INFO L78 Accepts]: Start accepts. Automaton has 42745 states and 167678 transitions. Word has length 32 [2022-01-18 17:42:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:56,871 INFO L470 AbstractCegarLoop]: Abstraction has 42745 states and 167678 transitions. [2022-01-18 17:42:56,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 42745 states and 167678 transitions. [2022-01-18 17:42:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:42:56,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:56,955 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] [2022-01-18 17:42:56,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-01-18 17:42:57,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 17:42:57,155 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:42:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1916574215, now seen corresponding path program 113 times [2022-01-18 17:42:57,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:57,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299881016] [2022-01-18 17:42:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:57,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:57,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299881016] [2022-01-18 17:42:57,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299881016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127732271] [2022-01-18 17:42:57,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:57,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:57,515 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:42:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 17:42:57,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 17:42:57,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 17:42:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:57,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:42:57,898 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-18 17:42:57,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:42:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:42:57,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:42:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:58,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:58,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:42:58,373 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:42:58,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:42:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:58,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127732271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:58,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:58,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-01-18 17:42:58,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217252007] [2022-01-18 17:42:58,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:58,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:42:58,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:42:58,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:42:58,762 INFO L87 Difference]: Start difference. First operand 42745 states and 167678 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:14,533 INFO L93 Difference]: Finished difference Result 81857 states and 307215 transitions. [2022-01-18 17:43:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2022-01-18 17:43:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:43:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:14,808 INFO L225 Difference]: With dead ends: 81857 [2022-01-18 17:43:14,808 INFO L226 Difference]: Without dead ends: 81799 [2022-01-18 17:43:14,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 49 SyntacticMatches, 18 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35516 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=13394, Invalid=62506, Unknown=0, NotChecked=0, Total=75900 [2022-01-18 17:43:14,810 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 1277 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 4558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2341 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:14,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1277 Valid, 722 Invalid, 4558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 1781 Invalid, 0 Unknown, 2341 Unchecked, 1.1s Time] [2022-01-18 17:43:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81799 states. [2022-01-18 17:43:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81799 to 45299. [2022-01-18 17:43:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45299 states, 45298 states have (on average 3.9278555344606825) internal successors, (177924), 45298 states have internal predecessors, (177924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45299 states to 45299 states and 177924 transitions. [2022-01-18 17:43:16,552 INFO L78 Accepts]: Start accepts. Automaton has 45299 states and 177924 transitions. Word has length 32 [2022-01-18 17:43:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:16,552 INFO L470 AbstractCegarLoop]: Abstraction has 45299 states and 177924 transitions. [2022-01-18 17:43:16,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 45299 states and 177924 transitions. [2022-01-18 17:43:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:43:16,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:16,643 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] [2022-01-18 17:43:16,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 17:43:16,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 17:43:16,843 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 381488527, now seen corresponding path program 114 times [2022-01-18 17:43:16,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:16,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281282679] [2022-01-18 17:43:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:16,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:17,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:17,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281282679] [2022-01-18 17:43:17,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281282679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:17,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477237852] [2022-01-18 17:43:17,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:17,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:17,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:17,200 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:17,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 17:43:17,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:17,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:43:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:17,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:43:17,471 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:43:17,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:43:17,579 INFO L353 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-01-18 17:43:17,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:43:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:43:17,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:17,956 INFO L353 Elim1Store]: treesize reduction 15, result has 69.4 percent of original size [2022-01-18 17:43:17,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 48 [2022-01-18 17:43:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:43:18,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477237852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:18,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:18,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-01-18 17:43:18,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533851956] [2022-01-18 17:43:18,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:18,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:43:18,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:43:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:43:18,249 INFO L87 Difference]: Start difference. First operand 45299 states and 177924 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:20,186 INFO L93 Difference]: Finished difference Result 55889 states and 214095 transitions. [2022-01-18 17:43:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:43:20,186 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:43:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:20,370 INFO L225 Difference]: With dead ends: 55889 [2022-01-18 17:43:20,370 INFO L226 Difference]: Without dead ends: 55805 [2022-01-18 17:43:20,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=606, Invalid=3426, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:43:20,371 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 369 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 934 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:20,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 474 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 516 Invalid, 0 Unknown, 934 Unchecked, 0.3s Time] [2022-01-18 17:43:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55805 states. [2022-01-18 17:43:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55805 to 45472. [2022-01-18 17:43:21,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45472 states, 45471 states have (on average 3.926128741395615) internal successors, (178525), 45471 states have internal predecessors, (178525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45472 states to 45472 states and 178525 transitions. [2022-01-18 17:43:21,557 INFO L78 Accepts]: Start accepts. Automaton has 45472 states and 178525 transitions. Word has length 32 [2022-01-18 17:43:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:21,558 INFO L470 AbstractCegarLoop]: Abstraction has 45472 states and 178525 transitions. [2022-01-18 17:43:21,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45472 states and 178525 transitions. [2022-01-18 17:43:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:43:21,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:21,648 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] [2022-01-18 17:43:21,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 17:43:21,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:21,849 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash -283875383, now seen corresponding path program 115 times [2022-01-18 17:43:21,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:21,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707652444] [2022-01-18 17:43:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:21,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:22,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:22,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707652444] [2022-01-18 17:43:22,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707652444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:22,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106017951] [2022-01-18 17:43:22,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:22,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:22,202 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:22,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 17:43:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:43:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:22,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:43:22,582 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:43:22,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:43:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:22,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:22,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:43:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:22,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:22,867 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:43:22,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:43:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:23,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106017951] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:23,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:23,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 17:43:23,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117964747] [2022-01-18 17:43:23,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:23,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:43:23,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:43:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:43:23,397 INFO L87 Difference]: Start difference. First operand 45472 states and 178525 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:29,026 INFO L93 Difference]: Finished difference Result 62264 states and 233957 transitions. [2022-01-18 17:43:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-18 17:43:29,026 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:43:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:29,319 INFO L225 Difference]: With dead ends: 62264 [2022-01-18 17:43:29,319 INFO L226 Difference]: Without dead ends: 60318 [2022-01-18 17:43:29,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5306 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2576, Invalid=11944, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 17:43:29,320 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1004 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:29,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 558 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1647 Invalid, 0 Unknown, 290 Unchecked, 0.9s Time] [2022-01-18 17:43:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60318 states. [2022-01-18 17:43:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60318 to 44889. [2022-01-18 17:43:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44889 states, 44888 states have (on average 3.936241311709143) internal successors, (176690), 44888 states have internal predecessors, (176690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44889 states to 44889 states and 176690 transitions. [2022-01-18 17:43:30,733 INFO L78 Accepts]: Start accepts. Automaton has 44889 states and 176690 transitions. Word has length 32 [2022-01-18 17:43:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:30,733 INFO L470 AbstractCegarLoop]: Abstraction has 44889 states and 176690 transitions. [2022-01-18 17:43:30,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:30,733 INFO L276 IsEmpty]: Start isEmpty. Operand 44889 states and 176690 transitions. [2022-01-18 17:43:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:43:30,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:30,826 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] [2022-01-18 17:43:30,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:31,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 17:43:31,027 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1587414643, now seen corresponding path program 116 times [2022-01-18 17:43:31,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333514739] [2022-01-18 17:43:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:31,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:31,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:31,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333514739] [2022-01-18 17:43:31,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333514739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:31,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797461806] [2022-01-18 17:43:31,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:31,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:31,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:31,375 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:31,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 17:43:31,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:31,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:31,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:43:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:31,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:43:31,699 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:43:31,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:43:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:31,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:43:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:31,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:32,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:32,027 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:43:32,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:43:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:32,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797461806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:32,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:32,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 17:43:32,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929776982] [2022-01-18 17:43:32,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:32,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:43:32,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:43:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:43:32,384 INFO L87 Difference]: Start difference. First operand 44889 states and 176690 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:36,984 INFO L93 Difference]: Finished difference Result 61347 states and 231426 transitions. [2022-01-18 17:43:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 17:43:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:43:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:37,188 INFO L225 Difference]: With dead ends: 61347 [2022-01-18 17:43:37,189 INFO L226 Difference]: Without dead ends: 61101 [2022-01-18 17:43:37,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2241, Invalid=10641, Unknown=0, NotChecked=0, Total=12882 [2022-01-18 17:43:37,189 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 930 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:37,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 596 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2303 Invalid, 0 Unknown, 170 Unchecked, 1.3s Time] [2022-01-18 17:43:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61101 states. [2022-01-18 17:43:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61101 to 45263. [2022-01-18 17:43:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45263 states, 45262 states have (on average 3.9337855154434185) internal successors, (178051), 45262 states have internal predecessors, (178051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45263 states to 45263 states and 178051 transitions. [2022-01-18 17:43:38,590 INFO L78 Accepts]: Start accepts. Automaton has 45263 states and 178051 transitions. Word has length 32 [2022-01-18 17:43:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:38,590 INFO L470 AbstractCegarLoop]: Abstraction has 45263 states and 178051 transitions. [2022-01-18 17:43:38,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 45263 states and 178051 transitions. [2022-01-18 17:43:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:43:38,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:38,680 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] [2022-01-18 17:43:38,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:38,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:38,880 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1682856645, now seen corresponding path program 117 times [2022-01-18 17:43:38,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:38,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145165671] [2022-01-18 17:43:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:38,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:39,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145165671] [2022-01-18 17:43:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145165671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834603109] [2022-01-18 17:43:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:39,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:39,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:39,232 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:39,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 17:43:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:43:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 17:43:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:39,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:43:39,639 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-18 17:43:39,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 17:43:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:39,722 INFO L353 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-01-18 17:43:39,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2022-01-18 17:43:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:43:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:40,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:40,102 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:43:40,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:43:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 17:43:40,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834603109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:40,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:40,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-01-18 17:43:40,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229153789] [2022-01-18 17:43:40,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:40,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 17:43:40,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 17:43:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-01-18 17:43:40,294 INFO L87 Difference]: Start difference. First operand 45263 states and 178051 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:44,768 INFO L93 Difference]: Finished difference Result 84532 states and 328094 transitions. [2022-01-18 17:43:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-18 17:43:44,769 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-18 17:43:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:45,240 INFO L225 Difference]: With dead ends: 84532 [2022-01-18 17:43:45,240 INFO L226 Difference]: Without dead ends: 84383 [2022-01-18 17:43:45,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4305 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1724, Invalid=10708, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 17:43:45,240 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 560 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 4480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2736 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:45,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 631 Invalid, 4480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1595 Invalid, 0 Unknown, 2736 Unchecked, 0.8s Time] [2022-01-18 17:43:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84383 states. [2022-01-18 17:43:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84383 to 46142. [2022-01-18 17:43:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46142 states, 46141 states have (on average 3.9425673479118353) internal successors, (181914), 46141 states have internal predecessors, (181914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46142 states to 46142 states and 181914 transitions. [2022-01-18 17:43:47,059 INFO L78 Accepts]: Start accepts. Automaton has 46142 states and 181914 transitions. Word has length 32 [2022-01-18 17:43:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:47,059 INFO L470 AbstractCegarLoop]: Abstraction has 46142 states and 181914 transitions. [2022-01-18 17:43:47,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 46142 states and 181914 transitions. [2022-01-18 17:43:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-18 17:43:47,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:47,161 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] [2022-01-18 17:43:47,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:47,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:47,375 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 17:43:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1599616251, now seen corresponding path program 118 times [2022-01-18 17:43:47,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:47,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684125654] [2022-01-18 17:43:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:47,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:47,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684125654] [2022-01-18 17:43:47,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684125654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:47,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153368712] [2022-01-18 17:43:47,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:47,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:47,715 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 17:43:47,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 17:43:47,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 17:43:47,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:48,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 17:43:48,058 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 17:43:48,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-01-18 17:43:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 17:43:48,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-01-18 17:43:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:48,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:48,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 17:43:48,598 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 17:43:48,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 46 [2022-01-18 17:43:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:48,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153368712] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:48,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:48,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-01-18 17:43:48,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421753241] [2022-01-18 17:43:48,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:48,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:43:48,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:43:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:43:48,957 INFO L87 Difference]: Start difference. First operand 46142 states and 181914 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 17:43:49,665 WARN L244 SmtUtils]: Removed 9 from assertion stack [2022-01-18 17:43:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 17:43:49,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=487, Invalid=1963, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:43:49,665 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 257 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:49,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 36 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 428 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-18 17:43:49,666 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 17:43:49,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-01-18 17:43:49,689 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:43:49,689 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 17:43:49,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:49,867 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (46142states) and FLOYD_HOARE automaton (currently 19 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 4ms.. [2022-01-18 17:43:49,868 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 17:43:49,868 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 17:43:49,868 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 17:43:49,870 INFO L732 BasicCegarLoop]: Path program histogram: [118, 34, 1, 1] [2022-01-18 17:43:49,871 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:43:49,872 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:43:49,873 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:43:49 BasicIcfg [2022-01-18 17:43:49,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:43:49,873 INFO L158 Benchmark]: Toolchain (without parser) took 753493.48ms. Allocated memory was 360.7MB in the beginning and 9.6GB in the end (delta: 9.2GB). Free memory was 322.3MB in the beginning and 7.9GB in the end (delta: -7.6GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2022-01-18 17:43:49,873 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 360.7MB. Free memory is still 323.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:43:49,873 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.93ms. Allocated memory is still 360.7MB. Free memory was 322.2MB in the beginning and 320.7MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 17:43:49,873 INFO L158 Benchmark]: Boogie Preprocessor took 12.50ms. Allocated memory is still 360.7MB. Free memory was 320.7MB in the beginning and 319.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:43:49,873 INFO L158 Benchmark]: RCFGBuilder took 215.27ms. Allocated memory is still 360.7MB. Free memory was 319.7MB in the beginning and 310.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 17:43:49,873 INFO L158 Benchmark]: TraceAbstraction took 753242.81ms. Allocated memory was 360.7MB in the beginning and 9.6GB in the end (delta: 9.2GB). Free memory was 309.7MB in the beginning and 7.9GB in the end (delta: -7.6GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2022-01-18 17:43:49,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11ms. Allocated memory is still 360.7MB. Free memory is still 323.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 18.93ms. Allocated memory is still 360.7MB. Free memory was 322.2MB in the beginning and 320.7MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 12.50ms. Allocated memory is still 360.7MB. Free memory was 320.7MB in the beginning and 319.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 215.27ms. Allocated memory is still 360.7MB. Free memory was 319.7MB in the beginning and 310.3MB in the end (delta: 9.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 753242.81ms. Allocated memory was 360.7MB in the beginning and 9.6GB in the end (delta: 9.2GB). Free memory was 309.7MB in the beginning and 7.9GB in the end (delta: -7.6GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (46142states) and FLOYD_HOARE automaton (currently 19 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 4ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46142states) and FLOYD_HOARE automaton (currently 19 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 4ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46142states) and FLOYD_HOARE automaton (currently 19 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 4ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (46142states) and FLOYD_HOARE automaton (currently 19 states, 38 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 27 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 753.1s, OverallIterations: 154, TraceHistogramMax: 3, PathProgramHistogramMax: 118, EmptinessCheckTime: 4.3s, AutomataDifference: 546.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 99006 SdHoareTripleChecker+Valid, 91.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 99006 mSDsluCounter, 69829 SdHoareTripleChecker+Invalid, 76.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 47836 IncrementalHoareTripleChecker+Unchecked, 117025 mSDsCounter, 22509 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189766 IncrementalHoareTripleChecker+Invalid, 260111 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22509 mSolverCounterUnsat, 5034 mSDtfsCounter, 189766 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24674 GetRequests, 7289 SyntacticMatches, 358 SemanticMatches, 17026 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1120587 ImplicationChecksByTransitivity, 444.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46142occurred in iteration=153, InterpolantAutomatonStates: 15582, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 74.3s AutomataMinimizationTime, 153 MinimizatonAttempts, 1676597 StatesRemovedByMinimization, 152 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 89.2s InterpolantComputationTime, 8986 NumberOfCodeBlocks, 8956 NumberOfCodeBlocksAsserted, 539 NumberOfCheckSat, 13000 ConstructedInterpolants, 547 QuantifiedInterpolants, 154075 SizeOfPredicates, 1450 NumberOfNonLiveVariables, 10894 ConjunctsInSsa, 2114 ConjunctsInUnsatCore, 458 InterpolantComputations, 2 PerfectInterpolantSequences, 1515/4531 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown