/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/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:06:17,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:06:18,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:06:18,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:06:18,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:06:18,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:06:18,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:06:18,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:06:18,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:06:18,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:06:18,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:06:18,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 16:06:18,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 16:06:18,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 16:06:18,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 16:06:18,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 16:06:18,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 16:06:18,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 16:06:18,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 16:06:18,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 16:06:18,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 16:06:18,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 16:06:18,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 16:06:18,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 16:06:18,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 16:06:18,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:06:18,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:06:18,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:06:18,090 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 16:06:18,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:06:18,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:06:18,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:06:18,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:06:18,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:06:18,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:06:18,114 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:06:18,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:06:18,114 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:06:18,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:06:18,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:06:18,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:06:18,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:06:18,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:06:18,117 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:06:18,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:06:18,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:06:18,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:06:18,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:06:18,347 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:06:18,348 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:06:18,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2022-01-18 16:06:18,349 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2022-01-18 16:06:18,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:06:18,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:06:18,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:06:18,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:06:18,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:06:18,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,396 INFO L137 Inliner]: procedures = 6, calls = 5, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:06:18,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:06:18,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:06:18,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:06:18,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:06:18,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:06:18,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:06:18,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:06:18,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:06:18,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/1) ... [2022-01-18 16:06:18,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:06:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:18,451 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 16:06:18,456 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 16:06:18,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:06:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:06:18,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:06:18,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:06:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:06:18,483 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:06:18,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:06:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:06:18,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:06:18,483 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 16:06:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 16:06:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 16:06:18,484 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 16:06:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 16:06:18,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 16:06:18,484 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-01-18 16:06:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-01-18 16:06:18,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-01-18 16:06:18,486 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 16:06:18,521 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:06:18,522 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:06:18,599 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:06:18,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:06:18,610 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:06:18,611 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:06:18 BoogieIcfgContainer [2022-01-18 16:06:18,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:06:18,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:06:18,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:06:18,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:06:18,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:06:18" (1/2) ... [2022-01-18 16:06:18,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7508d5b2 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:06:18, skipping insertion in model container [2022-01-18 16:06:18,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:06:18" (2/2) ... [2022-01-18 16:06:18,641 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2022-01-18 16:06:18,644 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:06:18,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:06:18,644 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:06:18,644 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:06:18,699 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-01-18 16:06:18,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:06:18,731 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 16:06:18,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-01-18 16:06:18,738 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2022-01-18 16:06:18,911 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:06:18,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:18,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:18,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:18,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2033241041, now seen corresponding path program 1 times [2022-01-18 16:06:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:18,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040819899] [2022-01-18 16:06:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:18,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:19,158 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 16:06:19,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:19,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040819899] [2022-01-18 16:06:19,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040819899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:19,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:19,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:06:19,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207593271] [2022-01-18 16:06:19,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:19,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:06:19,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:19,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:06:19,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:06:19,191 INFO L87 Difference]: Start difference. First operand has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 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 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:19,534 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2022-01-18 16:06:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:06:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:06:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:19,617 INFO L225 Difference]: With dead ends: 13093 [2022-01-18 16:06:19,617 INFO L226 Difference]: Without dead ends: 8907 [2022-01-18 16:06:19,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:06:19,625 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 123 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:19,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 203 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2022-01-18 16:06:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2022-01-18 16:06:19,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2022-01-18 16:06:19,896 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2022-01-18 16:06:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:19,897 INFO L470 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2022-01-18 16:06:19,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2022-01-18 16:06:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:06:19,911 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:19,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:19,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:06:19,912 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash 741983593, now seen corresponding path program 2 times [2022-01-18 16:06:19,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:19,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934996689] [2022-01-18 16:06:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:19,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:19,964 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 16:06:19,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:19,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934996689] [2022-01-18 16:06:19,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934996689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:19,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:19,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:19,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611267434] [2022-01-18 16:06:19,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:19,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:19,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:19,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:19,968 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:20,110 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2022-01-18 16:06:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:06:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:20,133 INFO L225 Difference]: With dead ends: 4814 [2022-01-18 16:06:20,134 INFO L226 Difference]: Without dead ends: 3427 [2022-01-18 16:06:20,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:06:20,135 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:20,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 86 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2022-01-18 16:06:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2022-01-18 16:06:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2022-01-18 16:06:20,241 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2022-01-18 16:06:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:20,242 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2022-01-18 16:06:20,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2022-01-18 16:06:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:06:20,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:20,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:20,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:06:20,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:20,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:20,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1484617105, now seen corresponding path program 3 times [2022-01-18 16:06:20,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:20,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299039512] [2022-01-18 16:06:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:20,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:20,285 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 16:06:20,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:20,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299039512] [2022-01-18 16:06:20,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299039512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:20,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:20,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:06:20,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587986893] [2022-01-18 16:06:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:20,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:06:20,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:20,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:06:20,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:06:20,328 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:20,530 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2022-01-18 16:06:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:06:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:06:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:20,568 INFO L225 Difference]: With dead ends: 13141 [2022-01-18 16:06:20,569 INFO L226 Difference]: Without dead ends: 9627 [2022-01-18 16:06:20,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:06:20,573 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 102 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:20,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 215 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2022-01-18 16:06:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2022-01-18 16:06:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2022-01-18 16:06:20,818 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2022-01-18 16:06:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2022-01-18 16:06:20,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2022-01-18 16:06:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 16:06:20,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:20,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:20,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:06:20,829 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash 769399599, now seen corresponding path program 4 times [2022-01-18 16:06:20,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:20,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121139262] [2022-01-18 16:06:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:20,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:20,866 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 16:06:20,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:20,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121139262] [2022-01-18 16:06:20,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121139262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:20,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:20,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:20,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384650671] [2022-01-18 16:06:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:20,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:20,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:20,868 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:20,962 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2022-01-18 16:06:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 16:06:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:20,978 INFO L225 Difference]: With dead ends: 4293 [2022-01-18 16:06:20,978 INFO L226 Difference]: Without dead ends: 3354 [2022-01-18 16:06:20,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:06:20,986 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:20,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 81 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2022-01-18 16:06:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2022-01-18 16:06:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2022-01-18 16:06:21,060 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2022-01-18 16:06:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:21,060 INFO L470 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2022-01-18 16:06:21,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2022-01-18 16:06:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:21,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:21,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:21,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:06:21,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:21,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:21,072 INFO L85 PathProgramCache]: Analyzing trace with hash -335950833, now seen corresponding path program 1 times [2022-01-18 16:06:21,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:21,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562975326] [2022-01-18 16:06:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:21,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:21,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:21,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562975326] [2022-01-18 16:06:21,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562975326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:21,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277670963] [2022-01-18 16:06:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:21,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:21,139 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 16:06:21,140 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 16:06:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:21,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:06:21,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:21,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:21,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277670963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:21,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:21,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 16:06:21,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25581867] [2022-01-18 16:06:21,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:21,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:06:21,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:21,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:06:21,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:06:21,322 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:21,446 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2022-01-18 16:06:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:06:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:21,473 INFO L225 Difference]: With dead ends: 6670 [2022-01-18 16:06:21,474 INFO L226 Difference]: Without dead ends: 6670 [2022-01-18 16:06:21,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:21,475 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:21,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 93 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2022-01-18 16:06:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2022-01-18 16:06:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:21,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2022-01-18 16:06:21,664 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2022-01-18 16:06:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:21,669 INFO L470 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2022-01-18 16:06:21,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2022-01-18 16:06:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:21,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:21,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:21,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 16:06:21,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:21,896 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1468654317, now seen corresponding path program 1 times [2022-01-18 16:06:21,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994633708] [2022-01-18 16:06:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:21,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:22,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:22,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994633708] [2022-01-18 16:06:22,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994633708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:22,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989333344] [2022-01-18 16:06:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:22,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:22,047 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 16:06:22,048 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 16:06:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:06:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:22,118 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 16:06:22,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:06:22,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989333344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:22,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:06:22,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-01-18 16:06:22,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482250233] [2022-01-18 16:06:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:22,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:22,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:06:22,120 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:22,231 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2022-01-18 16:06:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:22,250 INFO L225 Difference]: With dead ends: 5618 [2022-01-18 16:06:22,250 INFO L226 Difference]: Without dead ends: 5418 [2022-01-18 16:06:22,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:22,251 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:22,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 57 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2022-01-18 16:06:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2022-01-18 16:06:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2022-01-18 16:06:22,371 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2022-01-18 16:06:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2022-01-18 16:06:22,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2022-01-18 16:06:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:22,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:22,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:22,400 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 16:06:22,600 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,SelfDestructingSolverStorable5 [2022-01-18 16:06:22,600 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2119036691, now seen corresponding path program 1 times [2022-01-18 16:06:22,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393920127] [2022-01-18 16:06:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:22,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:22,634 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 16:06:22,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:22,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393920127] [2022-01-18 16:06:22,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393920127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:22,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:22,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:22,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325042381] [2022-01-18 16:06:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:22,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:22,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:22,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:22,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:22,635 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:22,736 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2022-01-18 16:06:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:22,814 INFO L225 Difference]: With dead ends: 7946 [2022-01-18 16:06:22,814 INFO L226 Difference]: Without dead ends: 7848 [2022-01-18 16:06:22,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:06:22,815 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:22,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 65 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2022-01-18 16:06:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2022-01-18 16:06:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2022-01-18 16:06:22,966 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2022-01-18 16:06:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:22,966 INFO L470 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2022-01-18 16:06:22,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2022-01-18 16:06:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:22,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:22,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:22,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 16:06:22,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1819963187, now seen corresponding path program 1 times [2022-01-18 16:06:22,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:22,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517395476] [2022-01-18 16:06:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:22,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:23,026 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 16:06:23,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:23,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517395476] [2022-01-18 16:06:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517395476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:23,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:23,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:23,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731094695] [2022-01-18 16:06:23,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:23,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:23,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:23,027 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:23,241 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2022-01-18 16:06:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:23,290 INFO L225 Difference]: With dead ends: 11319 [2022-01-18 16:06:23,290 INFO L226 Difference]: Without dead ends: 11198 [2022-01-18 16:06:23,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:06:23,291 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:23,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 65 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2022-01-18 16:06:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2022-01-18 16:06:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2022-01-18 16:06:23,578 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2022-01-18 16:06:23,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:23,578 INFO L470 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2022-01-18 16:06:23,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2022-01-18 16:06:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:23,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:23,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:23,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 16:06:23,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:23,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1903870103, now seen corresponding path program 2 times [2022-01-18 16:06:23,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:23,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853584479] [2022-01-18 16:06:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:23,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:23,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853584479] [2022-01-18 16:06:23,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853584479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:23,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897327116] [2022-01-18 16:06:23,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:06:23,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:23,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:23,651 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 16:06:23,652 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 16:06:23,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:06:23,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:23,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:06:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:23,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:23,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897327116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:23,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:23,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 8 [2022-01-18 16:06:23,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426179661] [2022-01-18 16:06:23,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:23,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:06:23,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:06:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:06:23,786 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 16:06:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:24,654 INFO L93 Difference]: Finished difference Result 31957 states and 138250 transitions. [2022-01-18 16:06:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:06:24,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 29 [2022-01-18 16:06:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:24,760 INFO L225 Difference]: With dead ends: 31957 [2022-01-18 16:06:24,761 INFO L226 Difference]: Without dead ends: 25190 [2022-01-18 16:06:24,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:06:24,761 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 383 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:24,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 357 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:06:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25190 states. [2022-01-18 16:06:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25190 to 11186. [2022-01-18 16:06:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11186 states, 11185 states have (on average 4.569959767545821) internal successors, (51115), 11185 states have internal predecessors, (51115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 51115 transitions. [2022-01-18 16:06:25,202 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 51115 transitions. Word has length 29 [2022-01-18 16:06:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:25,202 INFO L470 AbstractCegarLoop]: Abstraction has 11186 states and 51115 transitions. [2022-01-18 16:06:25,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 16:06:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 51115 transitions. [2022-01-18 16:06:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:25,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:25,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:25,346 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 16:06:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:25,539 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash -851551857, now seen corresponding path program 2 times [2022-01-18 16:06:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158496634] [2022-01-18 16:06:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:25,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:25,577 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 16:06:25,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:25,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158496634] [2022-01-18 16:06:25,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158496634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:25,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:25,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:25,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114918724] [2022-01-18 16:06:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:25,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:25,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:25,579 INFO L87 Difference]: Start difference. First operand 11186 states and 51115 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:25,716 INFO L93 Difference]: Finished difference Result 13521 states and 60589 transitions. [2022-01-18 16:06:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:25,761 INFO L225 Difference]: With dead ends: 13521 [2022-01-18 16:06:25,761 INFO L226 Difference]: Without dead ends: 13281 [2022-01-18 16:06:25,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:06:25,762 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:25,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 67 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13281 states. [2022-01-18 16:06:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13281 to 11164. [2022-01-18 16:06:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11164 states, 11163 states have (on average 4.55361461972588) internal successors, (50832), 11163 states have internal predecessors, (50832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11164 states to 11164 states and 50832 transitions. [2022-01-18 16:06:26,115 INFO L78 Accepts]: Start accepts. Automaton has 11164 states and 50832 transitions. Word has length 29 [2022-01-18 16:06:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 11164 states and 50832 transitions. [2022-01-18 16:06:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 11164 states and 50832 transitions. [2022-01-18 16:06:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:26,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:26,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:26,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 16:06:26,142 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:26,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:26,142 INFO L85 PathProgramCache]: Analyzing trace with hash -859965327, now seen corresponding path program 2 times [2022-01-18 16:06:26,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:26,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708149448] [2022-01-18 16:06:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:26,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:26,165 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 16:06:26,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708149448] [2022-01-18 16:06:26,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708149448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:26,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:26,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:26,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649814701] [2022-01-18 16:06:26,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:26,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:26,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:26,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:26,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:26,166 INFO L87 Difference]: Start difference. First operand 11164 states and 50832 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:26,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:26,267 INFO L93 Difference]: Finished difference Result 12568 states and 55860 transitions. [2022-01-18 16:06:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:06:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:26,306 INFO L225 Difference]: With dead ends: 12568 [2022-01-18 16:06:26,306 INFO L226 Difference]: Without dead ends: 12568 [2022-01-18 16:06:26,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:26,307 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:26,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12568 states. [2022-01-18 16:06:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 10980. [2022-01-18 16:06:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 4.559340559249477) internal successors, (50057), 10979 states have internal predecessors, (50057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:26,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 50057 transitions. [2022-01-18 16:06:26,643 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 50057 transitions. Word has length 29 [2022-01-18 16:06:26,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:26,643 INFO L470 AbstractCegarLoop]: Abstraction has 10980 states and 50057 transitions. [2022-01-18 16:06:26,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:26,643 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 50057 transitions. [2022-01-18 16:06:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:26,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:26,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 16:06:26,666 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2031483313, now seen corresponding path program 3 times [2022-01-18 16:06:26,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:26,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461235508] [2022-01-18 16:06:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:26,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:26,690 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 16:06:26,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:26,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461235508] [2022-01-18 16:06:26,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461235508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:26,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:26,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:26,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320171160] [2022-01-18 16:06:26,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:26,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:26,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:26,691 INFO L87 Difference]: Start difference. First operand 10980 states and 50057 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:26,874 INFO L93 Difference]: Finished difference Result 13957 states and 62115 transitions. [2022-01-18 16:06:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:06:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:26,918 INFO L225 Difference]: With dead ends: 13957 [2022-01-18 16:06:26,918 INFO L226 Difference]: Without dead ends: 13957 [2022-01-18 16:06:26,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:26,918 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:26,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 59 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13957 states. [2022-01-18 16:06:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13957 to 11348. [2022-01-18 16:06:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11348 states, 11347 states have (on average 4.560324314796863) internal successors, (51746), 11347 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11348 states to 11348 states and 51746 transitions. [2022-01-18 16:06:27,174 INFO L78 Accepts]: Start accepts. Automaton has 11348 states and 51746 transitions. Word has length 29 [2022-01-18 16:06:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:27,174 INFO L470 AbstractCegarLoop]: Abstraction has 11348 states and 51746 transitions. [2022-01-18 16:06:27,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 11348 states and 51746 transitions. [2022-01-18 16:06:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:27,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:27,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:27,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 16:06:27,200 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -153920747, now seen corresponding path program 4 times [2022-01-18 16:06:27,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544232778] [2022-01-18 16:06:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:27,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:27,238 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 16:06:27,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544232778] [2022-01-18 16:06:27,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544232778] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:27,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:27,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:06:27,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112401168] [2022-01-18 16:06:27,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:27,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:06:27,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:06:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:06:27,240 INFO L87 Difference]: Start difference. First operand 11348 states and 51746 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:27,387 INFO L93 Difference]: Finished difference Result 16579 states and 72053 transitions. [2022-01-18 16:06:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:27,566 INFO L225 Difference]: With dead ends: 16579 [2022-01-18 16:06:27,566 INFO L226 Difference]: Without dead ends: 16338 [2022-01-18 16:06:27,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:06:27,567 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:27,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 64 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:27,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16338 states. [2022-01-18 16:06:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16338 to 11284. [2022-01-18 16:06:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11284 states, 11283 states have (on average 4.5284055658955955) internal successors, (51094), 11283 states have internal predecessors, (51094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11284 states to 11284 states and 51094 transitions. [2022-01-18 16:06:27,891 INFO L78 Accepts]: Start accepts. Automaton has 11284 states and 51094 transitions. Word has length 29 [2022-01-18 16:06:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:27,892 INFO L470 AbstractCegarLoop]: Abstraction has 11284 states and 51094 transitions. [2022-01-18 16:06:27,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11284 states and 51094 transitions. [2022-01-18 16:06:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:27,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:27,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:27,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 16:06:27,917 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1102570583, now seen corresponding path program 2 times [2022-01-18 16:06:27,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:27,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965718039] [2022-01-18 16:06:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:27,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:27,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965718039] [2022-01-18 16:06:27,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965718039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635127133] [2022-01-18 16:06:27,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:06:27,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:27,962 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 16:06:27,963 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 16:06:27,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:06:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:06:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:28,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:28,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635127133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:28,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:28,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 8 [2022-01-18 16:06:28,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741122362] [2022-01-18 16:06:28,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:06:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:06:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:06:28,081 INFO L87 Difference]: Start difference. First operand 11284 states and 51094 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 16:06:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:29,076 INFO L93 Difference]: Finished difference Result 34532 states and 153051 transitions. [2022-01-18 16:06:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:06:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 29 [2022-01-18 16:06:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:29,125 INFO L225 Difference]: With dead ends: 34532 [2022-01-18 16:06:29,125 INFO L226 Difference]: Without dead ends: 15158 [2022-01-18 16:06:29,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:06:29,126 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 483 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:29,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 389 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:06:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15158 states. [2022-01-18 16:06:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15158 to 6407. [2022-01-18 16:06:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 6406 states have (on average 4.431002185451139) internal successors, (28385), 6406 states have internal predecessors, (28385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 28385 transitions. [2022-01-18 16:06:29,335 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 28385 transitions. Word has length 29 [2022-01-18 16:06:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:29,335 INFO L470 AbstractCegarLoop]: Abstraction has 6407 states and 28385 transitions. [2022-01-18 16:06:29,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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 16:06:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 28385 transitions. [2022-01-18 16:06:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:29,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:29,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:29,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-18 16:06:29,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:29,563 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash -128593545, now seen corresponding path program 3 times [2022-01-18 16:06:29,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:29,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595552774] [2022-01-18 16:06:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:29,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:29,590 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 16:06:29,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595552774] [2022-01-18 16:06:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595552774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:29,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:06:29,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909550431] [2022-01-18 16:06:29,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:29,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:06:29,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:06:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:06:29,592 INFO L87 Difference]: Start difference. First operand 6407 states and 28385 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:29,718 INFO L93 Difference]: Finished difference Result 6967 states and 30444 transitions. [2022-01-18 16:06:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:06:29,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:29,737 INFO L225 Difference]: With dead ends: 6967 [2022-01-18 16:06:29,737 INFO L226 Difference]: Without dead ends: 6541 [2022-01-18 16:06:29,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:06:29,737 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:29,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 57 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:06:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6541 states. [2022-01-18 16:06:29,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6541 to 5575. [2022-01-18 16:06:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 4.463939720129171) internal successors, (24882), 5574 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 24882 transitions. [2022-01-18 16:06:29,835 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 24882 transitions. Word has length 29 [2022-01-18 16:06:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:29,835 INFO L470 AbstractCegarLoop]: Abstraction has 5575 states and 24882 transitions. [2022-01-18 16:06:29,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 24882 transitions. [2022-01-18 16:06:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:06:29,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:29,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:29,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 16:06:29,846 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1069518777, now seen corresponding path program 5 times [2022-01-18 16:06:29,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425104945] [2022-01-18 16:06:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:29,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:29,878 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 16:06:29,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:29,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425104945] [2022-01-18 16:06:29,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425104945] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:06:29,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:06:29,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 16:06:29,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845515884] [2022-01-18 16:06:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:06:29,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:06:29,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:06:29,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:06:29,879 INFO L87 Difference]: Start difference. First operand 5575 states and 24882 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:29,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:29,982 INFO L93 Difference]: Finished difference Result 5778 states and 25550 transitions. [2022-01-18 16:06:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:06:29,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:06:29,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:29,998 INFO L225 Difference]: With dead ends: 5778 [2022-01-18 16:06:29,998 INFO L226 Difference]: Without dead ends: 5413 [2022-01-18 16:06:29,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:06:29,999 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:29,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 82 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2022-01-18 16:06:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 5186. [2022-01-18 16:06:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5186 states, 5185 states have (on average 4.515911282545805) internal successors, (23415), 5185 states have internal predecessors, (23415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5186 states to 5186 states and 23415 transitions. [2022-01-18 16:06:30,091 INFO L78 Accepts]: Start accepts. Automaton has 5186 states and 23415 transitions. Word has length 29 [2022-01-18 16:06:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:30,091 INFO L470 AbstractCegarLoop]: Abstraction has 5186 states and 23415 transitions. [2022-01-18 16:06:30,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5186 states and 23415 transitions. [2022-01-18 16:06:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:06:30,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:30,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:30,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-18 16:06:30,103 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1671022285, now seen corresponding path program 1 times [2022-01-18 16:06:30,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:30,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622955259] [2022-01-18 16:06:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:30,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:30,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:06:30,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622955259] [2022-01-18 16:06:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622955259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407911766] [2022-01-18 16:06:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:30,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:30,213 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 16:06:30,214 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 16:06:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:06:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:30,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:30,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407911766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:30,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:30,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 10 [2022-01-18 16:06:30,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123870273] [2022-01-18 16:06:30,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:30,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 16:06:30,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:30,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 16:06:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:06:30,342 INFO L87 Difference]: Start difference. First operand 5186 states and 23415 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 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 16:06:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:31,096 INFO L93 Difference]: Finished difference Result 18525 states and 84293 transitions. [2022-01-18 16:06:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:06:31,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 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 33 [2022-01-18 16:06:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:31,131 INFO L225 Difference]: With dead ends: 18525 [2022-01-18 16:06:31,131 INFO L226 Difference]: Without dead ends: 11569 [2022-01-18 16:06:31,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:06:31,132 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 327 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:31,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 368 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:06:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11569 states. [2022-01-18 16:06:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11569 to 6899. [2022-01-18 16:06:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2022-01-18 16:06:31,326 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 33 [2022-01-18 16:06:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:31,327 INFO L470 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2022-01-18 16:06:31,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 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 16:06:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2022-01-18 16:06:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-18 16:06:31,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:31,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:31,356 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 16:06:31,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 16:06:31,542 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1312827405, now seen corresponding path program 1 times [2022-01-18 16:06:31,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501118594] [2022-01-18 16:06:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:31,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:31,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:31,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501118594] [2022-01-18 16:06:31,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501118594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:31,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403594065] [2022-01-18 16:06:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:31,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:31,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:31,590 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 16:06:31,591 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 16:06:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:06:31,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:31,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:06:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:31,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:31,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403594065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:31,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:31,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-18 16:06:31,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140702463] [2022-01-18 16:06:31,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:31,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 16:06:31,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:31,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 16:06:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-18 16:06:31,851 INFO L87 Difference]: Start difference. First operand 6899 states and 30679 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 16:06:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:32,571 INFO L93 Difference]: Finished difference Result 38755 states and 176208 transitions. [2022-01-18 16:06:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:06:32,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 35 [2022-01-18 16:06:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:32,624 INFO L225 Difference]: With dead ends: 38755 [2022-01-18 16:06:32,624 INFO L226 Difference]: Without dead ends: 14819 [2022-01-18 16:06:32,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-01-18 16:06:32,625 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 477 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:32,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 532 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:06:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14819 states. [2022-01-18 16:06:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14819 to 6630. [2022-01-18 16:06:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 6629 states have (on average 4.445014330969981) internal successors, (29466), 6629 states have internal predecessors, (29466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 29466 transitions. [2022-01-18 16:06:32,837 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 29466 transitions. Word has length 35 [2022-01-18 16:06:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:32,838 INFO L470 AbstractCegarLoop]: Abstraction has 6630 states and 29466 transitions. [2022-01-18 16:06:32,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 16:06:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 29466 transitions. [2022-01-18 16:06:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:32,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:32,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:32,868 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 16:06:33,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 16:06:33,052 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:33,052 INFO L85 PathProgramCache]: Analyzing trace with hash 719578815, now seen corresponding path program 2 times [2022-01-18 16:06:33,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980622315] [2022-01-18 16:06:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:33,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:33,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980622315] [2022-01-18 16:06:33,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980622315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:33,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003215600] [2022-01-18 16:06:33,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:06:33,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:33,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:33,086 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 16:06:33,087 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 16:06:33,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:06:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:06:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:33,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:33,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003215600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:33,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:33,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:06:33,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405232100] [2022-01-18 16:06:33,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:33,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:06:33,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:33,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:06:33,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:33,215 INFO L87 Difference]: Start difference. First operand 6630 states and 29466 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:33,434 INFO L93 Difference]: Finished difference Result 13543 states and 60452 transitions. [2022-01-18 16:06:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:06:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:06:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:33,496 INFO L225 Difference]: With dead ends: 13543 [2022-01-18 16:06:33,496 INFO L226 Difference]: Without dead ends: 13454 [2022-01-18 16:06:33,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:33,497 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:33,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 128 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13454 states. [2022-01-18 16:06:33,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13454 to 10010. [2022-01-18 16:06:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 10009 states have (on average 4.585872714556899) internal successors, (45900), 10009 states have internal predecessors, (45900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 45900 transitions. [2022-01-18 16:06:33,761 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 45900 transitions. Word has length 37 [2022-01-18 16:06:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:33,761 INFO L470 AbstractCegarLoop]: Abstraction has 10010 states and 45900 transitions. [2022-01-18 16:06:33,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 45900 transitions. [2022-01-18 16:06:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:33,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:33,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:33,801 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 16:06:34,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:34,002 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1978719391, now seen corresponding path program 3 times [2022-01-18 16:06:34,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:34,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468109703] [2022-01-18 16:06:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:34,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:34,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468109703] [2022-01-18 16:06:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468109703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105267991] [2022-01-18 16:06:34,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:06:34,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:34,044 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 16:06:34,045 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 16:06:34,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:06:34,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:34,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105267991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:34,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:34,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 16:06:34,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017497271] [2022-01-18 16:06:34,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:06:34,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:06:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:34,221 INFO L87 Difference]: Start difference. First operand 10010 states and 45900 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 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 16:06:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:35,032 INFO L93 Difference]: Finished difference Result 40406 states and 177883 transitions. [2022-01-18 16:06:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:06:35,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 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 37 [2022-01-18 16:06:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:35,232 INFO L225 Difference]: With dead ends: 40406 [2022-01-18 16:06:35,232 INFO L226 Difference]: Without dead ends: 40406 [2022-01-18 16:06:35,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:06:35,235 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 827 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:35,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 370 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:06:35,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40406 states. [2022-01-18 16:06:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40406 to 15922. [2022-01-18 16:06:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15922 states, 15921 states have (on average 4.713334589535833) internal successors, (75041), 15921 states have internal predecessors, (75041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15922 states to 15922 states and 75041 transitions. [2022-01-18 16:06:35,999 INFO L78 Accepts]: Start accepts. Automaton has 15922 states and 75041 transitions. Word has length 37 [2022-01-18 16:06:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:35,999 INFO L470 AbstractCegarLoop]: Abstraction has 15922 states and 75041 transitions. [2022-01-18 16:06:35,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 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 16:06:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 15922 states and 75041 transitions. [2022-01-18 16:06:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:36,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:36,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:36,052 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 16:06:36,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:36,238 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:36,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash -284742391, now seen corresponding path program 4 times [2022-01-18 16:06:36,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:36,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028068507] [2022-01-18 16:06:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:36,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:36,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:36,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028068507] [2022-01-18 16:06:36,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028068507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:36,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037737908] [2022-01-18 16:06:36,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:06:36,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:36,267 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 16:06:36,268 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 16:06:36,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:06:36,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:06:36,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:36,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037737908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:36,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:36,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:06:36,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833405983] [2022-01-18 16:06:36,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:36,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:06:36,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:36,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:06:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:06:36,402 INFO L87 Difference]: Start difference. First operand 15922 states and 75041 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:36,645 INFO L93 Difference]: Finished difference Result 24305 states and 113541 transitions. [2022-01-18 16:06:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:06:36,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:06:36,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:36,745 INFO L225 Difference]: With dead ends: 24305 [2022-01-18 16:06:36,745 INFO L226 Difference]: Without dead ends: 24255 [2022-01-18 16:06:36,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:06:36,745 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:36,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 125 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24255 states. [2022-01-18 16:06:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24255 to 18587. [2022-01-18 16:06:37,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18587 states, 18586 states have (on average 4.826912730011837) internal successors, (89713), 18586 states have internal predecessors, (89713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18587 states to 18587 states and 89713 transitions. [2022-01-18 16:06:37,220 INFO L78 Accepts]: Start accepts. Automaton has 18587 states and 89713 transitions. Word has length 37 [2022-01-18 16:06:37,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:37,220 INFO L470 AbstractCegarLoop]: Abstraction has 18587 states and 89713 transitions. [2022-01-18 16:06:37,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:37,220 INFO L276 IsEmpty]: Start isEmpty. Operand 18587 states and 89713 transitions. [2022-01-18 16:06:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:37,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:37,261 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:37,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:06:37,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:37,463 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash 127833705, now seen corresponding path program 5 times [2022-01-18 16:06:37,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:37,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844039637] [2022-01-18 16:06:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:37,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:37,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844039637] [2022-01-18 16:06:37,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844039637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:37,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990028229] [2022-01-18 16:06:37,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:06:37,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:37,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:37,508 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 16:06:37,511 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 16:06:37,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:06:37,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:37,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:37,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990028229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:37,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2022-01-18 16:06:37,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43964756] [2022-01-18 16:06:37,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:37,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:06:37,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:06:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:37,627 INFO L87 Difference]: Start difference. First operand 18587 states and 89713 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:37,875 INFO L93 Difference]: Finished difference Result 23734 states and 110378 transitions. [2022-01-18 16:06:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:06:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2022-01-18 16:06:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:37,961 INFO L225 Difference]: With dead ends: 23734 [2022-01-18 16:06:37,962 INFO L226 Difference]: Without dead ends: 23646 [2022-01-18 16:06:37,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:37,962 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 151 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:37,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 163 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23646 states. [2022-01-18 16:06:38,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23646 to 18136. [2022-01-18 16:06:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18136 states, 18135 states have (on average 4.818968844775297) internal successors, (87392), 18135 states have internal predecessors, (87392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18136 states to 18136 states and 87392 transitions. [2022-01-18 16:06:38,465 INFO L78 Accepts]: Start accepts. Automaton has 18136 states and 87392 transitions. Word has length 37 [2022-01-18 16:06:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:38,465 INFO L470 AbstractCegarLoop]: Abstraction has 18136 states and 87392 transitions. [2022-01-18 16:06:38,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18136 states and 87392 transitions. [2022-01-18 16:06:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:38,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:38,508 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:38,524 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 16:06:38,709 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,SelfDestructingSolverStorable21 [2022-01-18 16:06:38,709 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash -749287461, now seen corresponding path program 6 times [2022-01-18 16:06:38,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:38,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880939693] [2022-01-18 16:06:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:38,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:38,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880939693] [2022-01-18 16:06:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880939693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:38,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319043150] [2022-01-18 16:06:38,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:06:38,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:38,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:38,743 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 16:06:38,744 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 16:06:38,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:06:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:38,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:06:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:38,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319043150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:38,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:38,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:06:38,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704804929] [2022-01-18 16:06:38,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:38,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:06:38,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:38,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:06:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:38,879 INFO L87 Difference]: Start difference. First operand 18136 states and 87392 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:39,149 INFO L93 Difference]: Finished difference Result 23975 states and 112314 transitions. [2022-01-18 16:06:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:06:39,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2022-01-18 16:06:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:39,238 INFO L225 Difference]: With dead ends: 23975 [2022-01-18 16:06:39,238 INFO L226 Difference]: Without dead ends: 23975 [2022-01-18 16:06:39,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:06:39,239 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 143 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:39,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 152 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23975 states. [2022-01-18 16:06:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23975 to 19956. [2022-01-18 16:06:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19956 states, 19955 states have (on average 4.781057379102982) internal successors, (95406), 19955 states have internal predecessors, (95406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19956 states to 19956 states and 95406 transitions. [2022-01-18 16:06:39,788 INFO L78 Accepts]: Start accepts. Automaton has 19956 states and 95406 transitions. Word has length 37 [2022-01-18 16:06:39,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:39,788 INFO L470 AbstractCegarLoop]: Abstraction has 19956 states and 95406 transitions. [2022-01-18 16:06:39,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:39,788 INFO L276 IsEmpty]: Start isEmpty. Operand 19956 states and 95406 transitions. [2022-01-18 16:06:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:39,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:39,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:39,850 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 16:06:40,035 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,SelfDestructingSolverStorable22 [2022-01-18 16:06:40,036 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -955025865, now seen corresponding path program 7 times [2022-01-18 16:06:40,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908602361] [2022-01-18 16:06:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:40,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:40,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:40,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908602361] [2022-01-18 16:06:40,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908602361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:40,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815252336] [2022-01-18 16:06:40,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:06:40,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:40,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:40,078 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 16:06:40,078 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 16:06:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:40,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:40,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:40,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815252336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:40,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:40,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:06:40,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562948254] [2022-01-18 16:06:40,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:40,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:06:40,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:40,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:06:40,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:40,240 INFO L87 Difference]: Start difference. First operand 19956 states and 95406 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:40,667 INFO L93 Difference]: Finished difference Result 44310 states and 212572 transitions. [2022-01-18 16:06:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:06:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:06:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:40,844 INFO L225 Difference]: With dead ends: 44310 [2022-01-18 16:06:40,844 INFO L226 Difference]: Without dead ends: 41133 [2022-01-18 16:06:40,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:40,845 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 237 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:40,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 117 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41133 states. [2022-01-18 16:06:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41133 to 31838. [2022-01-18 16:06:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31838 states, 31837 states have (on average 4.9403210101454285) internal successors, (157285), 31837 states have internal predecessors, (157285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31838 states to 31838 states and 157285 transitions. [2022-01-18 16:06:41,850 INFO L78 Accepts]: Start accepts. Automaton has 31838 states and 157285 transitions. Word has length 37 [2022-01-18 16:06:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:41,850 INFO L470 AbstractCegarLoop]: Abstraction has 31838 states and 157285 transitions. [2022-01-18 16:06:41,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 31838 states and 157285 transitions. [2022-01-18 16:06:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:42,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:42,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:42,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-18 16:06:42,287 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,SelfDestructingSolverStorable23 [2022-01-18 16:06:42,287 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash -192959213, now seen corresponding path program 8 times [2022-01-18 16:06:42,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:42,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195722441] [2022-01-18 16:06:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:42,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:42,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:42,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195722441] [2022-01-18 16:06:42,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195722441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:42,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095117605] [2022-01-18 16:06:42,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:06:42,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:42,323 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 16:06:42,324 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 16:06:42,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:06:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:42,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:42,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095117605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:42,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:42,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 16:06:42,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467511075] [2022-01-18 16:06:42,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:42,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:06:42,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:42,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:06:42,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:42,462 INFO L87 Difference]: Start difference. First operand 31838 states and 157285 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 16:06:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:43,650 INFO L93 Difference]: Finished difference Result 82611 states and 397805 transitions. [2022-01-18 16:06:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:06:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 37 [2022-01-18 16:06:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:44,071 INFO L225 Difference]: With dead ends: 82611 [2022-01-18 16:06:44,071 INFO L226 Difference]: Without dead ends: 82035 [2022-01-18 16:06:44,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:06:44,072 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1095 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:44,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 226 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:06:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82035 states. [2022-01-18 16:06:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82035 to 47194. [2022-01-18 16:06:45,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47194 states, 47193 states have (on average 5.122814824232408) internal successors, (241761), 47193 states have internal predecessors, (241761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47194 states to 47194 states and 241761 transitions. [2022-01-18 16:06:46,117 INFO L78 Accepts]: Start accepts. Automaton has 47194 states and 241761 transitions. Word has length 37 [2022-01-18 16:06:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:46,117 INFO L470 AbstractCegarLoop]: Abstraction has 47194 states and 241761 transitions. [2022-01-18 16:06:46,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 16:06:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 47194 states and 241761 transitions. [2022-01-18 16:06:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:46,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:46,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:46,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 16:06:46,440 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,SelfDestructingSolverStorable24 [2022-01-18 16:06:46,440 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:46,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1968934825, now seen corresponding path program 9 times [2022-01-18 16:06:46,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725839739] [2022-01-18 16:06:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:46,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:46,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725839739] [2022-01-18 16:06:46,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725839739] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:46,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888821212] [2022-01-18 16:06:46,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:06:46,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:46,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:46,475 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 16:06:46,476 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 16:06:46,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:06:46,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:46,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:46,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:46,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888821212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:46,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:46,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:06:46,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407256583] [2022-01-18 16:06:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:06:46,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:06:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:06:46,600 INFO L87 Difference]: Start difference. First operand 47194 states and 241761 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 16:06:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:47,461 INFO L93 Difference]: Finished difference Result 73552 states and 372489 transitions. [2022-01-18 16:06:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:06:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 37 [2022-01-18 16:06:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:48,077 INFO L225 Difference]: With dead ends: 73552 [2022-01-18 16:06:48,077 INFO L226 Difference]: Without dead ends: 72839 [2022-01-18 16:06:48,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:06:48,077 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 125 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:48,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 133 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72839 states. [2022-01-18 16:06:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72839 to 61641. [2022-01-18 16:06:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61641 states, 61640 states have (on average 5.20309863724854) internal successors, (320719), 61640 states have internal predecessors, (320719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61641 states to 61641 states and 320719 transitions. [2022-01-18 16:06:50,176 INFO L78 Accepts]: Start accepts. Automaton has 61641 states and 320719 transitions. Word has length 37 [2022-01-18 16:06:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:50,176 INFO L470 AbstractCegarLoop]: Abstraction has 61641 states and 320719 transitions. [2022-01-18 16:06:50,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 16:06:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 61641 states and 320719 transitions. [2022-01-18 16:06:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:50,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:50,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:50,744 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 16:06:50,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:50,930 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1201958867, now seen corresponding path program 10 times [2022-01-18 16:06:50,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:50,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576610643] [2022-01-18 16:06:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:50,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:50,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576610643] [2022-01-18 16:06:50,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576610643] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:50,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484020616] [2022-01-18 16:06:50,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:06:50,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:50,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:50,963 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 16:06:50,964 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 16:06:50,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:06:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:51,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:51,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484020616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:51,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:51,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-18 16:06:51,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54021760] [2022-01-18 16:06:51,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:51,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:06:51,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:06:51,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:51,086 INFO L87 Difference]: Start difference. First operand 61641 states and 320719 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:52,028 INFO L93 Difference]: Finished difference Result 76643 states and 385153 transitions. [2022-01-18 16:06:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:06:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2022-01-18 16:06:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:52,409 INFO L225 Difference]: With dead ends: 76643 [2022-01-18 16:06:52,409 INFO L226 Difference]: Without dead ends: 76057 [2022-01-18 16:06:52,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:06:52,410 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 210 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:52,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 115 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76057 states. [2022-01-18 16:06:54,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76057 to 61831. [2022-01-18 16:06:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61831 states, 61830 states have (on average 5.161361798479702) internal successors, (319127), 61830 states have internal predecessors, (319127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61831 states to 61831 states and 319127 transitions. [2022-01-18 16:06:54,786 INFO L78 Accepts]: Start accepts. Automaton has 61831 states and 319127 transitions. Word has length 37 [2022-01-18 16:06:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:54,786 INFO L470 AbstractCegarLoop]: Abstraction has 61831 states and 319127 transitions. [2022-01-18 16:06:54,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 61831 states and 319127 transitions. [2022-01-18 16:06:54,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:54,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:54,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:55,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-18 16:06:55,194 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,SelfDestructingSolverStorable26 [2022-01-18 16:06:55,194 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:06:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:06:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash 908013899, now seen corresponding path program 11 times [2022-01-18 16:06:55,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:06:55,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873700866] [2022-01-18 16:06:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:06:55,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:06:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:06:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:06:55,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:06:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873700866] [2022-01-18 16:06:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873700866] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:06:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668718723] [2022-01-18 16:06:55,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:06:55,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:06:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:06:55,233 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 16:06:55,234 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 16:06:55,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:06:55,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:06:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:06:55,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:06:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:06:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:06:55,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668718723] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:06:55,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:06:55,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-01-18 16:06:55,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343393438] [2022-01-18 16:06:55,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:06:55,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:06:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:06:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:06:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:06:55,362 INFO L87 Difference]: Start difference. First operand 61831 states and 319127 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:06:56,509 INFO L93 Difference]: Finished difference Result 84634 states and 431631 transitions. [2022-01-18 16:06:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:06:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 37 [2022-01-18 16:06:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:06:56,943 INFO L225 Difference]: With dead ends: 84634 [2022-01-18 16:06:56,943 INFO L226 Difference]: Without dead ends: 84566 [2022-01-18 16:06:56,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:06:56,944 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 165 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:06:56,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 162 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:06:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84566 states. [2022-01-18 16:06:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84566 to 71753. [2022-01-18 16:06:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71753 states, 71752 states have (on average 5.2471986843572305) internal successors, (376497), 71752 states have internal predecessors, (376497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:06:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71753 states to 71753 states and 376497 transitions. [2022-01-18 16:06:59,720 INFO L78 Accepts]: Start accepts. Automaton has 71753 states and 376497 transitions. Word has length 37 [2022-01-18 16:06:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:06:59,720 INFO L470 AbstractCegarLoop]: Abstraction has 71753 states and 376497 transitions. [2022-01-18 16:06:59,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 16:06:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 71753 states and 376497 transitions. [2022-01-18 16:06:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:06:59,962 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:06:59,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:06:59,978 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 16:07:00,162 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,SelfDestructingSolverStorable27 [2022-01-18 16:07:00,163 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:07:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:07:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1774549323, now seen corresponding path program 12 times [2022-01-18 16:07:00,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:07:00,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571016027] [2022-01-18 16:07:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:07:00,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:07:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:07:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:07:00,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:07:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571016027] [2022-01-18 16:07:00,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571016027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:07:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830995677] [2022-01-18 16:07:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:07:00,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:00,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:07:00,210 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 16:07:00,211 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 16:07:00,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:07:00,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:07:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:07:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:07:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:07:00,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:07:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:07:00,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830995677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:07:00,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:07:00,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:07:00,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102011278] [2022-01-18 16:07:00,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:07:00,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:07:00,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:07:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:07:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:07:00,353 INFO L87 Difference]: Start difference. First operand 71753 states and 376497 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 16:07:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:07:02,005 INFO L93 Difference]: Finished difference Result 110278 states and 553747 transitions. [2022-01-18 16:07:02,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:07:02,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 37 [2022-01-18 16:07:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:07:02,583 INFO L225 Difference]: With dead ends: 110278 [2022-01-18 16:07:02,583 INFO L226 Difference]: Without dead ends: 109573 [2022-01-18 16:07:02,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:07:02,583 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 502 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:07:02,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 226 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:07:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109573 states. [2022-01-18 16:07:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109573 to 74322. [2022-01-18 16:07:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74322 states, 74321 states have (on average 5.247036503814535) internal successors, (389965), 74321 states have internal predecessors, (389965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74322 states to 74322 states and 389965 transitions. [2022-01-18 16:07:05,716 INFO L78 Accepts]: Start accepts. Automaton has 74322 states and 389965 transitions. Word has length 37 [2022-01-18 16:07:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:07:05,717 INFO L470 AbstractCegarLoop]: Abstraction has 74322 states and 389965 transitions. [2022-01-18 16:07:05,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 16:07:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 74322 states and 389965 transitions. [2022-01-18 16:07:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-18 16:07:05,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:07:05,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:07:05,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 16:07:06,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 16:07:06,163 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:07:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:07:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1172790239, now seen corresponding path program 13 times [2022-01-18 16:07:06,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:07:06,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532732135] [2022-01-18 16:07:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:07:06,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:07:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:07:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:07:06,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:07:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532732135] [2022-01-18 16:07:06,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532732135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:07:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149625024] [2022-01-18 16:07:06,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:07:06,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:07:06,203 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 16:07:06,205 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 16:07:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:07:06,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:07:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:07:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:07:06,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:07:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:07:06,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149625024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:07:06,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:07:06,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 16:07:06,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844248141] [2022-01-18 16:07:06,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:07:06,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:07:06,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:07:06,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:07:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:07:06,342 INFO L87 Difference]: Start difference. First operand 74322 states and 389965 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:07:07,547 INFO L93 Difference]: Finished difference Result 91180 states and 461642 transitions. [2022-01-18 16:07:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:07:07,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-18 16:07:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:07:07,979 INFO L225 Difference]: With dead ends: 91180 [2022-01-18 16:07:07,979 INFO L226 Difference]: Without dead ends: 88926 [2022-01-18 16:07:07,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:07:07,980 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 256 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:07:07,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 160 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:07:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88926 states. [2022-01-18 16:07:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88926 to 75015. [2022-01-18 16:07:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75015 states, 75014 states have (on average 5.18580531634095) internal successors, (389008), 75014 states have internal predecessors, (389008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75015 states to 75015 states and 389008 transitions. [2022-01-18 16:07:10,812 INFO L78 Accepts]: Start accepts. Automaton has 75015 states and 389008 transitions. Word has length 37 [2022-01-18 16:07:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:07:10,812 INFO L470 AbstractCegarLoop]: Abstraction has 75015 states and 389008 transitions. [2022-01-18 16:07:10,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 75015 states and 389008 transitions. [2022-01-18 16:07:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:07:11,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:07:11,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:07:11,152 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 16:07:11,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:11,339 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:07:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:07:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1101710729, now seen corresponding path program 14 times [2022-01-18 16:07:11,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:07:11,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112488629] [2022-01-18 16:07:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:07:11,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:07:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:07:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:07:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:07:11,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112488629] [2022-01-18 16:07:11,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112488629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:07:11,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876224176] [2022-01-18 16:07:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:07:11,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:11,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:07:11,365 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 16:07:11,368 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 16:07:11,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:07:11,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:07:11,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:07:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:07:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:07:11,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:07:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:07:11,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876224176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:07:11,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:07:11,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 16:07:11,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32320820] [2022-01-18 16:07:11,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:07:11,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:07:11,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:07:11,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:07:11,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:07:11,534 INFO L87 Difference]: Start difference. First operand 75015 states and 389008 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 16:07:15,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:07:15,063 INFO L93 Difference]: Finished difference Result 275270 states and 1388210 transitions. [2022-01-18 16:07:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 16:07:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 39 [2022-01-18 16:07:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:07:17,288 INFO L225 Difference]: With dead ends: 275270 [2022-01-18 16:07:17,288 INFO L226 Difference]: Without dead ends: 269830 [2022-01-18 16:07:17,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 16:07:17,289 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 425 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:07:17,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 421 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:07:17,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269830 states. [2022-01-18 16:07:22,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269830 to 145449. [2022-01-18 16:07:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145449 states, 145448 states have (on average 5.241591496617348) internal successors, (762379), 145448 states have internal predecessors, (762379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145449 states to 145449 states and 762379 transitions. [2022-01-18 16:07:23,863 INFO L78 Accepts]: Start accepts. Automaton has 145449 states and 762379 transitions. Word has length 39 [2022-01-18 16:07:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:07:23,863 INFO L470 AbstractCegarLoop]: Abstraction has 145449 states and 762379 transitions. [2022-01-18 16:07:23,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 16:07:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 145449 states and 762379 transitions. [2022-01-18 16:07:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:07:24,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:07:24,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:07:24,997 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 16:07:25,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:25,184 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:07:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:07:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -799366409, now seen corresponding path program 15 times [2022-01-18 16:07:25,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:07:25,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790952318] [2022-01-18 16:07:25,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:07:25,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:07:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:07:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:07:25,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:07:25,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790952318] [2022-01-18 16:07:25,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790952318] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:07:25,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049304313] [2022-01-18 16:07:25,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:07:25,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:25,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:07:25,211 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 16:07:25,212 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 16:07:25,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:07:25,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:07:25,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:07:25,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:07:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:07:25,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:07:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:07:25,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049304313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:07:25,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:07:25,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:07:25,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232094655] [2022-01-18 16:07:25,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:07:25,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:07:25,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:07:25,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:07:25,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:07:25,335 INFO L87 Difference]: Start difference. First operand 145449 states and 762379 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:07:28,629 INFO L93 Difference]: Finished difference Result 294101 states and 1545824 transitions. [2022-01-18 16:07:28,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:07:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 16:07:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:07:31,015 INFO L225 Difference]: With dead ends: 294101 [2022-01-18 16:07:31,016 INFO L226 Difference]: Without dead ends: 283581 [2022-01-18 16:07:31,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:07:31,016 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:07:31,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 114 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:07:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283581 states. [2022-01-18 16:07:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283581 to 232781. [2022-01-18 16:07:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232781 states, 232780 states have (on average 5.385282240742332) internal successors, (1253586), 232780 states have internal predecessors, (1253586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232781 states to 232781 states and 1253586 transitions. [2022-01-18 16:07:41,058 INFO L78 Accepts]: Start accepts. Automaton has 232781 states and 1253586 transitions. Word has length 39 [2022-01-18 16:07:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:07:41,058 INFO L470 AbstractCegarLoop]: Abstraction has 232781 states and 1253586 transitions. [2022-01-18 16:07:41,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:07:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 232781 states and 1253586 transitions. [2022-01-18 16:07:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:07:42,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:07:42,351 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:07:42,366 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 16:07:42,566 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,SelfDestructingSolverStorable31 [2022-01-18 16:07:42,567 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:07:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:07:42,567 INFO L85 PathProgramCache]: Analyzing trace with hash 528337843, now seen corresponding path program 16 times [2022-01-18 16:07:42,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:07:42,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390702626] [2022-01-18 16:07:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:07:42,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:07:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:07:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:07:42,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:07:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390702626] [2022-01-18 16:07:42,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390702626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:07:42,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835933057] [2022-01-18 16:07:42,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:07:42,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:07:42,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:07:42,632 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 16:07:42,633 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 16:07:42,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:07:42,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:07:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:07:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:07:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:07:42,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:07:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:07:42,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835933057] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:07:42,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:07:42,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:07:42,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707252566] [2022-01-18 16:07:42,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:07:42,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:07:42,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:07:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:07:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:07:42,831 INFO L87 Difference]: Start difference. First operand 232781 states and 1253586 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 16:07:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:07:49,182 INFO L93 Difference]: Finished difference Result 415375 states and 2156473 transitions. [2022-01-18 16:07:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:07:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 39 [2022-01-18 16:07:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:07:52,651 INFO L225 Difference]: With dead ends: 415375 [2022-01-18 16:07:52,651 INFO L226 Difference]: Without dead ends: 410126 [2022-01-18 16:07:52,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:07:52,652 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 364 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:07:52,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 423 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:07:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410126 states. [2022-01-18 16:08:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410126 to 265933. [2022-01-18 16:08:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265933 states, 265932 states have (on average 5.428639652241927) internal successors, (1443649), 265932 states have internal predecessors, (1443649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:08:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265933 states to 265933 states and 1443649 transitions. [2022-01-18 16:08:06,495 INFO L78 Accepts]: Start accepts. Automaton has 265933 states and 1443649 transitions. Word has length 39 [2022-01-18 16:08:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:08:06,495 INFO L470 AbstractCegarLoop]: Abstraction has 265933 states and 1443649 transitions. [2022-01-18 16:08:06,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 16:08:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 265933 states and 1443649 transitions. [2022-01-18 16:08:07,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:08:07,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:08:07,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:08:07,508 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 16:08:07,693 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,SelfDestructingSolverStorable32 [2022-01-18 16:08:07,694 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:08:07,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:08:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 504473771, now seen corresponding path program 17 times [2022-01-18 16:08:07,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:08:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062940618] [2022-01-18 16:08:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:08:07,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:08:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:08:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:08:07,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:08:07,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062940618] [2022-01-18 16:08:07,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062940618] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:08:07,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612367349] [2022-01-18 16:08:07,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:08:07,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:08:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:08:07,723 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 16:08:07,723 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 16:08:07,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:08:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:08:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:08:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:08:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:08:07,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:08:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:08:07,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612367349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:08:07,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:08:07,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:08:07,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609276675] [2022-01-18 16:08:07,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:08:07,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:08:07,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:08:07,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:08:07,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:08:07,872 INFO L87 Difference]: Start difference. First operand 265933 states and 1443649 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 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 16:08:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:08:14,138 INFO L93 Difference]: Finished difference Result 469376 states and 2484819 transitions. [2022-01-18 16:08:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 16:08:14,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 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 39 [2022-01-18 16:08:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:08:18,156 INFO L225 Difference]: With dead ends: 469376 [2022-01-18 16:08:18,156 INFO L226 Difference]: Without dead ends: 467076 [2022-01-18 16:08:18,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-01-18 16:08:18,157 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 337 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:08:18,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 293 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:08:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467076 states. [2022-01-18 16:08:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467076 to 358953. [2022-01-18 16:08:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358953 states, 358952 states have (on average 5.489357908578306) internal successors, (1970416), 358952 states have internal predecessors, (1970416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:08:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358953 states to 358953 states and 1970416 transitions. [2022-01-18 16:08:38,851 INFO L78 Accepts]: Start accepts. Automaton has 358953 states and 1970416 transitions. Word has length 39 [2022-01-18 16:08:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:08:38,851 INFO L470 AbstractCegarLoop]: Abstraction has 358953 states and 1970416 transitions. [2022-01-18 16:08:38,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 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 16:08:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 358953 states and 1970416 transitions. [2022-01-18 16:08:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 16:08:40,560 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:08:40,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:08:40,578 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 16:08:40,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:08:40,767 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:08:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:08:40,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1357100559, now seen corresponding path program 18 times [2022-01-18 16:08:40,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:08:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983256357] [2022-01-18 16:08:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:08:40,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:08:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:08:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 16:08:40,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:08:40,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983256357] [2022-01-18 16:08:40,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983256357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:08:40,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422274955] [2022-01-18 16:08:40,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:08:40,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:08:40,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:08:40,803 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 16:08:40,804 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 16:08:40,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:08:40,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:08:40,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:08:40,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:08:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:08:40,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:08:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-18 16:08:40,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422274955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:08:40,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:08:40,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:08:40,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706517239] [2022-01-18 16:08:40,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:08:40,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:08:40,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:08:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:08:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:08:40,947 INFO L87 Difference]: Start difference. First operand 358953 states and 1970416 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 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 16:08:47,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:08:47,312 INFO L93 Difference]: Finished difference Result 456825 states and 2467276 transitions. [2022-01-18 16:08:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 16:08:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 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 39 [2022-01-18 16:08:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:08:51,532 INFO L225 Difference]: With dead ends: 456825 [2022-01-18 16:08:51,532 INFO L226 Difference]: Without dead ends: 456783 [2022-01-18 16:08:51,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:08:51,533 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 241 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:08:51,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 269 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:08:52,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456783 states. [2022-01-18 16:09:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456783 to 354735. [2022-01-18 16:09:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354735 states, 354734 states have (on average 5.482166919438227) internal successors, (1944711), 354734 states have internal predecessors, (1944711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:09:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354735 states to 354735 states and 1944711 transitions. [2022-01-18 16:09:08,461 INFO L78 Accepts]: Start accepts. Automaton has 354735 states and 1944711 transitions. Word has length 39 [2022-01-18 16:09:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:09:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 354735 states and 1944711 transitions. [2022-01-18 16:09:08,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 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 16:09:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand 354735 states and 1944711 transitions. [2022-01-18 16:09:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 16:09:11,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:09:11,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:09:11,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 16:09:11,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:11,656 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:09:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:09:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1595327855, now seen corresponding path program 19 times [2022-01-18 16:09:11,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:09:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147747812] [2022-01-18 16:09:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:09:11,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:09:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:09:11,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:09:11,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147747812] [2022-01-18 16:09:11,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147747812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:09:11,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667307163] [2022-01-18 16:09:11,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:09:11,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:09:11,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:09:11,740 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 16:09:11,742 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 16:09:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:09:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:09:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:09:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:09:11,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:09:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 16:09:11,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667307163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:09:11,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:09:11,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-18 16:09:11,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381553603] [2022-01-18 16:09:11,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:09:11,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:09:11,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:09:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:09:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:09:11,958 INFO L87 Difference]: Start difference. First operand 354735 states and 1944711 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 16:09:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:09:29,032 INFO L93 Difference]: Finished difference Result 1004039 states and 5499213 transitions. [2022-01-18 16:09:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 16:09:29,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 41 [2022-01-18 16:09:29,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:09:45,677 INFO L225 Difference]: With dead ends: 1004039 [2022-01-18 16:09:45,677 INFO L226 Difference]: Without dead ends: 1004039 [2022-01-18 16:09:45,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:09:45,678 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 242 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:09:45,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 201 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:09:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004039 states. [2022-01-18 16:10:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004039 to 728634. [2022-01-18 16:10:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728634 states, 728633 states have (on average 5.617968167788173) internal successors, (4093437), 728633 states have internal predecessors, (4093437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:10:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728634 states to 728634 states and 4093437 transitions. [2022-01-18 16:10:31,158 INFO L78 Accepts]: Start accepts. Automaton has 728634 states and 4093437 transitions. Word has length 41 [2022-01-18 16:10:31,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:10:31,160 INFO L470 AbstractCegarLoop]: Abstraction has 728634 states and 4093437 transitions. [2022-01-18 16:10:31,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 16:10:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 728634 states and 4093437 transitions. [2022-01-18 16:10:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-18 16:10:37,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:10:37,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:10:37,245 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 16:10:37,442 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,SelfDestructingSolverStorable35 [2022-01-18 16:10:37,442 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 16:10:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:10:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash 731678573, now seen corresponding path program 20 times [2022-01-18 16:10:37,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:10:37,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887762553] [2022-01-18 16:10:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:10:37,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:10:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:10:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 16:10:37,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:10:37,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887762553] [2022-01-18 16:10:37,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887762553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:10:37,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692251899] [2022-01-18 16:10:37,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:10:37,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:10:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:10:37,506 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 16:10:37,547 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 16:10:37,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:10:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:10:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:10:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:10:37,645 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 16:10:37,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:10:37,711 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 16:10:37,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692251899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:10:37,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:10:37,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:10:37,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834848587] [2022-01-18 16:10:37,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:10:37,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:10:37,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:10:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:10:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:10:37,712 INFO L87 Difference]: Start difference. First operand 728634 states and 4093437 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)