/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 02:57:41,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:57:41,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:57:41,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 02:57:41,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 02:57:41,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:57:41,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:57:41,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:57:41,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:57:41,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:57:41,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:57:41,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:57:41,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:57:41,358 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:57:41,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:57:41,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:57:41,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:57:41,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:57:41,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:57:41,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:57:41,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:57:41,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:57:41,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:57:41,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:57:41,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:57:41,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:57:41,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:57:41,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:57:41,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:57:41,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:57:41,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:57:41,561 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:57:41,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-01-31 02:57:41,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d397f15ec/7b8d56fcac60442d8dc6a191b22191e3/FLAG701cb777b [2022-01-31 02:57:41,875 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:57:41,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-01-31 02:57:41,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d397f15ec/7b8d56fcac60442d8dc6a191b22191e3/FLAG701cb777b [2022-01-31 02:57:42,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d397f15ec/7b8d56fcac60442d8dc6a191b22191e3 [2022-01-31 02:57:42,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:57:42,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:57:42,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:57:42,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:57:42,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:57:42,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37bc073c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42, skipping insertion in model container [2022-01-31 02:57:42,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:57:42,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:57:42,445 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c[368,381] [2022-01-31 02:57:42,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:57:42,486 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:57:42,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c[368,381] [2022-01-31 02:57:42,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:57:42,516 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:57:42,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42 WrapperNode [2022-01-31 02:57:42,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:57:42,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:57:42,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:57:42,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:57:42,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:57:42,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:57:42,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:57:42,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:57:42,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (1/1) ... [2022-01-31 02:57:42,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:57:42,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:42,612 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) [2022-01-31 02:57:42,628 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 [2022-01-31 02:57:42,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:57:42,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:57:42,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:57:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:57:42,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:57:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:57:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:57:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:57:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:57:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:57:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:57:42,691 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:57:42,692 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:57:42,787 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:57:42,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:57:42,790 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 02:57:42,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:57:42 BoogieIcfgContainer [2022-01-31 02:57:42,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:57:42,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:57:42,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:57:42,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:57:42,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:57:42" (1/3) ... [2022-01-31 02:57:42,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a86197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:57:42, skipping insertion in model container [2022-01-31 02:57:42,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:57:42" (2/3) ... [2022-01-31 02:57:42,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a86197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:57:42, skipping insertion in model container [2022-01-31 02:57:42,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:57:42" (3/3) ... [2022-01-31 02:57:42,797 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2022-01-31 02:57:42,800 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:57:42,800 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:57:42,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:57:42,832 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=PETRI_NET, 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 [2022-01-31 02:57:42,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:57:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 02:57:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 02:57:42,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:42,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:42,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1060076674, now seen corresponding path program 1 times [2022-01-31 02:57:42,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:42,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704414900] [2022-01-31 02:57:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:42,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:42,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:43,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704414900] [2022-01-31 02:57:43,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704414900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:43,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:43,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 02:57:43,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094994730] [2022-01-31 02:57:43,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 02:57:43,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 02:57:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 02:57:43,041 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:43,089 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-01-31 02:57:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 02:57:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 02:57:43,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:43,107 INFO L225 Difference]: With dead ends: 41 [2022-01-31 02:57:43,108 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 02:57:43,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 02:57:43,112 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:43,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 02:57:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 02:57:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-31 02:57:43,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-01-31 02:57:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:43,145 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-31 02:57:43,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-31 02:57:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 02:57:43,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:43,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:43,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:57:43,147 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:43,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1174593278, now seen corresponding path program 1 times [2022-01-31 02:57:43,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:43,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285952604] [2022-01-31 02:57:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:43,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:43,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285952604] [2022-01-31 02:57:43,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285952604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:43,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:43,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 02:57:43,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650340084] [2022-01-31 02:57:43,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:43,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 02:57:43,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:43,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 02:57:43,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 02:57:43,350 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:43,442 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-01-31 02:57:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 02:57:43,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 02:57:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:43,444 INFO L225 Difference]: With dead ends: 28 [2022-01-31 02:57:43,444 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 02:57:43,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 02:57:43,450 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:43,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 02:57:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 02:57:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-01-31 02:57:43,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2022-01-31 02:57:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:43,457 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-01-31 02:57:43,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-01-31 02:57:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 02:57:43,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:43,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:43,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 02:57:43,459 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2018158143, now seen corresponding path program 1 times [2022-01-31 02:57:43,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121567724] [2022-01-31 02:57:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:43,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121567724] [2022-01-31 02:57:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121567724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:43,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:43,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:57:43,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926839523] [2022-01-31 02:57:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:57:43,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:57:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:57:43,503 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:43,544 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-01-31 02:57:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:57:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 02:57:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:43,546 INFO L225 Difference]: With dead ends: 35 [2022-01-31 02:57:43,546 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 02:57:43,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:57:43,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:43,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 02:57:43,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 02:57:43,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-01-31 02:57:43,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 17 [2022-01-31 02:57:43,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:43,552 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-01-31 02:57:43,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-01-31 02:57:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 02:57:43,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:43,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:43,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 02:57:43,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash -615329744, now seen corresponding path program 1 times [2022-01-31 02:57:43,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:43,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860876812] [2022-01-31 02:57:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:43,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:43,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860876812] [2022-01-31 02:57:43,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860876812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:43,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:43,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:57:43,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154994142] [2022-01-31 02:57:43,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:43,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:57:43,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:57:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:57:43,603 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:43,643 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-01-31 02:57:43,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:57:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 02:57:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:43,645 INFO L225 Difference]: With dead ends: 44 [2022-01-31 02:57:43,645 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 02:57:43,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:57:43,646 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:43,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 25 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 02:57:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 02:57:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-01-31 02:57:43,652 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 17 [2022-01-31 02:57:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-01-31 02:57:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-01-31 02:57:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 02:57:43,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:43,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:43,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 02:57:43,653 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:43,653 INFO L85 PathProgramCache]: Analyzing trace with hash -578961840, now seen corresponding path program 1 times [2022-01-31 02:57:43,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:43,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920383310] [2022-01-31 02:57:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:43,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:43,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920383310] [2022-01-31 02:57:43,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920383310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:57:43,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:57:43,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 02:57:43,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860684566] [2022-01-31 02:57:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:57:43,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 02:57:43,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 02:57:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 02:57:43,703 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:43,746 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2022-01-31 02:57:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 02:57:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 02:57:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:43,747 INFO L225 Difference]: With dead ends: 44 [2022-01-31 02:57:43,747 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 02:57:43,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 02:57:43,748 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:43,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 02:57:43,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 02:57:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 02:57:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-01-31 02:57:43,769 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 17 [2022-01-31 02:57:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:43,769 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-01-31 02:57:43,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-01-31 02:57:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 02:57:43,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:43,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:43,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 02:57:43,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:43,770 INFO L85 PathProgramCache]: Analyzing trace with hash 388404751, now seen corresponding path program 1 times [2022-01-31 02:57:43,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:43,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617491077] [2022-01-31 02:57:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:43,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:43,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617491077] [2022-01-31 02:57:43,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617491077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:43,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079039004] [2022-01-31 02:57:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:43,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:43,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:43,827 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) [2022-01-31 02:57:43,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:57:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 02:57:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:43,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079039004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:44,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:44,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-31 02:57:44,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836073430] [2022-01-31 02:57:44,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:44,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 02:57:44,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 02:57:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 02:57:44,063 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:44,278 INFO L93 Difference]: Finished difference Result 75 states and 114 transitions. [2022-01-31 02:57:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:57:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 02:57:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:44,281 INFO L225 Difference]: With dead ends: 75 [2022-01-31 02:57:44,282 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 02:57:44,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-01-31 02:57:44,286 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:44,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 46 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 02:57:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2022-01-31 02:57:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2022-01-31 02:57:44,298 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 17 [2022-01-31 02:57:44,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:44,298 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2022-01-31 02:57:44,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2022-01-31 02:57:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 02:57:44,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:44,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:44,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:44,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-31 02:57:44,500 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 9935328, now seen corresponding path program 1 times [2022-01-31 02:57:44,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34138418] [2022-01-31 02:57:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:44,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:44,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:44,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34138418] [2022-01-31 02:57:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34138418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:44,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195758626] [2022-01-31 02:57:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:44,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:44,612 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) [2022-01-31 02:57:44,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:57:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 02:57:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:44,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195758626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:44,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:44,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-01-31 02:57:44,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547435738] [2022-01-31 02:57:44,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:44,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 02:57:44,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 02:57:44,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-01-31 02:57:44,773 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:44,980 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2022-01-31 02:57:44,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 02:57:44,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 02:57:44,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:44,981 INFO L225 Difference]: With dead ends: 71 [2022-01-31 02:57:44,981 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 02:57:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:57:44,982 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:44,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 47 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 02:57:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2022-01-31 02:57:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.441860465116279) internal successors, (62), 43 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2022-01-31 02:57:44,990 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 19 [2022-01-31 02:57:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:44,990 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2022-01-31 02:57:44,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2022-01-31 02:57:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 02:57:44,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:44,992 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:45,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:45,192 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,SelfDestructingSolverStorable6 [2022-01-31 02:57:45,193 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1933081666, now seen corresponding path program 2 times [2022-01-31 02:57:45,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:45,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899646016] [2022-01-31 02:57:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:45,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:45,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:45,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899646016] [2022-01-31 02:57:45,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899646016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:45,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330908897] [2022-01-31 02:57:45,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:45,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:45,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:45,327 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) [2022-01-31 02:57:45,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:57:45,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:45,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:45,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 02:57:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:45,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:45,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330908897] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:45,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:45,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-01-31 02:57:45,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869530127] [2022-01-31 02:57:45,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:45,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 02:57:45,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 02:57:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-01-31 02:57:45,525 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:46,292 INFO L93 Difference]: Finished difference Result 196 states and 310 transitions. [2022-01-31 02:57:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 02:57:46,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 02:57:46,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:46,294 INFO L225 Difference]: With dead ends: 196 [2022-01-31 02:57:46,294 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 02:57:46,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 02:57:46,295 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 313 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:46,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 74 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 02:57:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 02:57:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 75. [2022-01-31 02:57:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2022-01-31 02:57:46,305 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 20 [2022-01-31 02:57:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:46,305 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2022-01-31 02:57:46,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2022-01-31 02:57:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 02:57:46,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:46,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:46,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 02:57:46,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:46,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1695200847, now seen corresponding path program 1 times [2022-01-31 02:57:46,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:46,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609583878] [2022-01-31 02:57:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:46,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:46,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:46,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609583878] [2022-01-31 02:57:46,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609583878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:46,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708743354] [2022-01-31 02:57:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:46,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:46,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:46,681 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) [2022-01-31 02:57:46,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:57:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:46,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 02:57:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:46,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 02:57:46,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708743354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:46,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:46,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 13 [2022-01-31 02:57:46,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653178631] [2022-01-31 02:57:46,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:46,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 02:57:46,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 02:57:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-31 02:57:46,915 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:47,039 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-01-31 02:57:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 02:57:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 02:57:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:47,041 INFO L225 Difference]: With dead ends: 87 [2022-01-31 02:57:47,041 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 02:57:47,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:57:47,043 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:47,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 46 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 02:57:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-01-31 02:57:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2022-01-31 02:57:47,057 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 21 [2022-01-31 02:57:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:47,058 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2022-01-31 02:57:47,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2022-01-31 02:57:47,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 02:57:47,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:47,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:47,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:47,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:47,275 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 38994402, now seen corresponding path program 1 times [2022-01-31 02:57:47,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536361276] [2022-01-31 02:57:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:47,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:47,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:57:47,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536361276] [2022-01-31 02:57:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536361276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700586400] [2022-01-31 02:57:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:47,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:47,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:47,361 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) [2022-01-31 02:57:47,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:57:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 02:57:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:57:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:57:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700586400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:47,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:47,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-01-31 02:57:47,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488472705] [2022-01-31 02:57:47,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:47,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 02:57:47,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 02:57:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:57:47,610 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:47,935 INFO L93 Difference]: Finished difference Result 107 states and 151 transitions. [2022-01-31 02:57:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 02:57:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 02:57:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:47,936 INFO L225 Difference]: With dead ends: 107 [2022-01-31 02:57:47,936 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 02:57:47,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-01-31 02:57:47,937 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:47,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 65 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 02:57:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2022-01-31 02:57:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 58 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-01-31 02:57:47,946 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 22 [2022-01-31 02:57:47,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:47,946 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-01-31 02:57:47,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-01-31 02:57:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 02:57:47,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:47,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:47,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:48,175 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,SelfDestructingSolverStorable9 [2022-01-31 02:57:48,176 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -462225342, now seen corresponding path program 2 times [2022-01-31 02:57:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:48,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224485327] [2022-01-31 02:57:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:48,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:48,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:48,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224485327] [2022-01-31 02:57:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224485327] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:48,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365302602] [2022-01-31 02:57:48,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:48,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:48,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:48,283 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) [2022-01-31 02:57:48,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 02:57:48,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:48,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 02:57:48,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:48,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:48,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365302602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:48,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:48,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-01-31 02:57:48,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385593405] [2022-01-31 02:57:48,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:48,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 02:57:48,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 02:57:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-01-31 02:57:48,415 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:48,859 INFO L93 Difference]: Finished difference Result 117 states and 170 transitions. [2022-01-31 02:57:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 02:57:48,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 02:57:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:48,860 INFO L225 Difference]: With dead ends: 117 [2022-01-31 02:57:48,860 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 02:57:48,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-01-31 02:57:48,861 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:48,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 73 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:57:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 02:57:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-01-31 02:57:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 108 transitions. [2022-01-31 02:57:48,867 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 108 transitions. Word has length 22 [2022-01-31 02:57:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:48,867 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 108 transitions. [2022-01-31 02:57:48,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 108 transitions. [2022-01-31 02:57:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 02:57:48,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:48,868 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:48,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:49,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:49,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 295906898, now seen corresponding path program 2 times [2022-01-31 02:57:49,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:49,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225140758] [2022-01-31 02:57:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:49,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:49,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:57:49,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225140758] [2022-01-31 02:57:49,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225140758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:49,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748692336] [2022-01-31 02:57:49,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:49,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:49,192 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) [2022-01-31 02:57:49,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 02:57:49,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:49,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 02:57:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:57:49,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:57:49,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748692336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:49,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:49,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-01-31 02:57:49,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580887743] [2022-01-31 02:57:49,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:49,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 02:57:49,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:49,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 02:57:49,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-31 02:57:49,427 INFO L87 Difference]: Start difference. First operand 79 states and 108 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:52,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:52,232 INFO L93 Difference]: Finished difference Result 273 states and 404 transitions. [2022-01-31 02:57:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 02:57:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 02:57:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:52,234 INFO L225 Difference]: With dead ends: 273 [2022-01-31 02:57:52,234 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 02:57:52,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1438, Invalid=4568, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 02:57:52,236 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 358 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:52,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 91 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 02:57:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 02:57:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 98. [2022-01-31 02:57:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 93 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 134 transitions. [2022-01-31 02:57:52,246 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 134 transitions. Word has length 24 [2022-01-31 02:57:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:52,246 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 134 transitions. [2022-01-31 02:57:52,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 134 transitions. [2022-01-31 02:57:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 02:57:52,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:52,247 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] [2022-01-31 02:57:52,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:52,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:52,464 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:52,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1097749168, now seen corresponding path program 2 times [2022-01-31 02:57:52,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:52,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630460583] [2022-01-31 02:57:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:52,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:52,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 02:57:52,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:52,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630460583] [2022-01-31 02:57:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630460583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:52,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849556111] [2022-01-31 02:57:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:57:52,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:52,544 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) [2022-01-31 02:57:52,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 02:57:52,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:57:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 02:57:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 02:57:52,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 02:57:52,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849556111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:52,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:52,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-31 02:57:52,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552548584] [2022-01-31 02:57:52,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:52,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 02:57:52,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 02:57:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 02:57:52,681 INFO L87 Difference]: Start difference. First operand 98 states and 134 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:52,794 INFO L93 Difference]: Finished difference Result 122 states and 166 transitions. [2022-01-31 02:57:52,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 02:57:52,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 02:57:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:52,794 INFO L225 Difference]: With dead ends: 122 [2022-01-31 02:57:52,795 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 02:57:52,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 02:57:52,795 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:52,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 02:57:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-01-31 02:57:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.3775510204081634) internal successors, (135), 98 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 139 transitions. [2022-01-31 02:57:52,804 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 139 transitions. Word has length 25 [2022-01-31 02:57:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:52,805 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 139 transitions. [2022-01-31 02:57:52,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:52,805 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 139 transitions. [2022-01-31 02:57:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 02:57:52,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:52,805 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:52,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:53,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 02:57:53,006 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1115860192, now seen corresponding path program 3 times [2022-01-31 02:57:53,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294062384] [2022-01-31 02:57:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:53,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:53,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:53,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:53,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294062384] [2022-01-31 02:57:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294062384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:53,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249269061] [2022-01-31 02:57:53,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:57:53,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:53,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:53,138 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) [2022-01-31 02:57:53,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 02:57:53,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 02:57:53,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 02:57:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:57:53,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:57:53,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249269061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:53,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:53,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-01-31 02:57:53,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556256267] [2022-01-31 02:57:53,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:53,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 02:57:53,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 02:57:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-01-31 02:57:53,318 INFO L87 Difference]: Start difference. First operand 103 states and 139 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:54,534 INFO L93 Difference]: Finished difference Result 190 states and 270 transitions. [2022-01-31 02:57:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 02:57:54,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 02:57:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:54,536 INFO L225 Difference]: With dead ends: 190 [2022-01-31 02:57:54,536 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 02:57:54,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=480, Invalid=2942, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 02:57:54,537 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 140 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:54,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 89 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 02:57:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 02:57:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 118. [2022-01-31 02:57:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.3805309734513274) internal successors, (156), 113 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2022-01-31 02:57:54,551 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 160 transitions. Word has length 25 [2022-01-31 02:57:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:54,553 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-01-31 02:57:54,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 160 transitions. [2022-01-31 02:57:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 02:57:54,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:54,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:54,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 02:57:54,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 02:57:54,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:54,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:54,770 INFO L85 PathProgramCache]: Analyzing trace with hash -137630238, now seen corresponding path program 3 times [2022-01-31 02:57:54,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:54,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114765148] [2022-01-31 02:57:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:54,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:54,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:54,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114765148] [2022-01-31 02:57:54,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114765148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:54,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416979719] [2022-01-31 02:57:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:57:54,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:54,953 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) [2022-01-31 02:57:54,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 02:57:54,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 02:57:54,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 02:57:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:55,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:57:55,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416979719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:55,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:55,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2022-01-31 02:57:55,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17000412] [2022-01-31 02:57:55,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:55,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 02:57:55,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 02:57:55,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-31 02:57:55,323 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:57:55,570 INFO L93 Difference]: Finished difference Result 133 states and 175 transitions. [2022-01-31 02:57:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:57:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 02:57:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:57:55,571 INFO L225 Difference]: With dead ends: 133 [2022-01-31 02:57:55,571 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 02:57:55,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-01-31 02:57:55,572 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:57:55,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 61 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:57:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 02:57:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-01-31 02:57:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3980582524271845) internal successors, (144), 103 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2022-01-31 02:57:55,583 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 26 [2022-01-31 02:57:55,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:57:55,583 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2022-01-31 02:57:55,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:57:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2022-01-31 02:57:55,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 02:57:55,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:57:55,584 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:57:55,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 02:57:55,800 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,SelfDestructingSolverStorable14 [2022-01-31 02:57:55,800 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:57:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:57:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1003454959, now seen corresponding path program 3 times [2022-01-31 02:57:55,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:57:55,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701429257] [2022-01-31 02:57:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:57:55,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:57:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:57:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:57:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:55,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:57:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701429257] [2022-01-31 02:57:55,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701429257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:57:55,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208958824] [2022-01-31 02:57:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:57:55,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:57:55,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:57:55,992 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) [2022-01-31 02:57:56,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 02:57:56,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 02:57:56,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:57:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 02:57:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:57:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:56,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:57:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:57:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208958824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:57:56,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:57:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-01-31 02:57:56,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284773995] [2022-01-31 02:57:56,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:57:56,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 02:57:56,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:57:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 02:57:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-01-31 02:57:56,489 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:26,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:26,575 INFO L93 Difference]: Finished difference Result 601 states and 923 transitions. [2022-01-31 02:58:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 02:58:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 02:58:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:26,578 INFO L225 Difference]: With dead ends: 601 [2022-01-31 02:58:26,578 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 02:58:26,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1927, Invalid=5555, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 02:58:26,579 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1102 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:26,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 152 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 02:58:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 02:58:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 167. [2022-01-31 02:58:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.3950617283950617) internal successors, (226), 162 states have internal predecessors, (226), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 230 transitions. [2022-01-31 02:58:26,599 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 230 transitions. Word has length 27 [2022-01-31 02:58:26,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:26,599 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 230 transitions. [2022-01-31 02:58:26,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:26,599 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 230 transitions. [2022-01-31 02:58:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 02:58:26,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:26,599 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:26,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:26,816 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,SelfDestructingSolverStorable15 [2022-01-31 02:58:26,816 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2128187618, now seen corresponding path program 3 times [2022-01-31 02:58:26,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658929340] [2022-01-31 02:58:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:26,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 02:58:26,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658929340] [2022-01-31 02:58:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658929340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526782739] [2022-01-31 02:58:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:58:26,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:26,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:26,942 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) [2022-01-31 02:58:26,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 02:58:26,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 02:58:26,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:26,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 02:58:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 02:58:27,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 02:58:27,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526782739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:27,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:27,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-01-31 02:58:27,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226475608] [2022-01-31 02:58:27,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:27,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 02:58:27,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 02:58:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-01-31 02:58:27,102 INFO L87 Difference]: Start difference. First operand 167 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:28,412 INFO L93 Difference]: Finished difference Result 279 states and 387 transitions. [2022-01-31 02:58:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 02:58:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 02:58:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:28,413 INFO L225 Difference]: With dead ends: 279 [2022-01-31 02:58:28,413 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 02:58:28,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=2891, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 02:58:28,414 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 155 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:28,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 124 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 02:58:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 02:58:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2022-01-31 02:58:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.4066666666666667) internal successors, (211), 150 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 215 transitions. [2022-01-31 02:58:28,437 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 215 transitions. Word has length 28 [2022-01-31 02:58:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:28,437 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 215 transitions. [2022-01-31 02:58:28,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 215 transitions. [2022-01-31 02:58:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 02:58:28,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:28,437 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:28,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:28,654 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,SelfDestructingSolverStorable16 [2022-01-31 02:58:28,654 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 401313666, now seen corresponding path program 4 times [2022-01-31 02:58:28,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:28,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89923315] [2022-01-31 02:58:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:28,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:28,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:58:28,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89923315] [2022-01-31 02:58:28,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89923315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063197881] [2022-01-31 02:58:28,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:58:28,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:28,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:28,778 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) [2022-01-31 02:58:28,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 02:58:28,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:58:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:28,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 02:58:28,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:28,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 02:58:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063197881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:28,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-01-31 02:58:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124579632] [2022-01-31 02:58:28,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:28,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 02:58:28,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 02:58:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:58:28,964 INFO L87 Difference]: Start difference. First operand 155 states and 215 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:31,478 INFO L93 Difference]: Finished difference Result 294 states and 418 transitions. [2022-01-31 02:58:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 02:58:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 02:58:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:31,480 INFO L225 Difference]: With dead ends: 294 [2022-01-31 02:58:31,480 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 02:58:31,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=840, Invalid=6300, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 02:58:31,482 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 179 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:31,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 108 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 02:58:31,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 02:58:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 185. [2022-01-31 02:58:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.4) internal successors, (252), 180 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 256 transitions. [2022-01-31 02:58:31,523 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 256 transitions. Word has length 28 [2022-01-31 02:58:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:31,524 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 256 transitions. [2022-01-31 02:58:31,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 256 transitions. [2022-01-31 02:58:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 02:58:31,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:31,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:31,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:31,737 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,SelfDestructingSolverStorable17 [2022-01-31 02:58:31,737 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1456672573, now seen corresponding path program 4 times [2022-01-31 02:58:31,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:31,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041839904] [2022-01-31 02:58:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:31,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:31,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:31,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041839904] [2022-01-31 02:58:31,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041839904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004111299] [2022-01-31 02:58:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:58:31,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:31,815 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) [2022-01-31 02:58:31,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 02:58:31,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:58:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:31,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 02:58:31,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:31,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:31,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004111299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:31,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:31,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-31 02:58:31,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886672186] [2022-01-31 02:58:31,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:31,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 02:58:31,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:31,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 02:58:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 02:58:31,987 INFO L87 Difference]: Start difference. First operand 185 states and 256 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:32,195 INFO L93 Difference]: Finished difference Result 238 states and 321 transitions. [2022-01-31 02:58:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 02:58:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 02:58:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:32,196 INFO L225 Difference]: With dead ends: 238 [2022-01-31 02:58:32,196 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 02:58:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-31 02:58:32,197 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:32,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 51 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 02:58:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 02:58:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 207. [2022-01-31 02:58:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.3712871287128714) internal successors, (277), 202 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-01-31 02:58:32,224 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 30 [2022-01-31 02:58:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:32,224 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-01-31 02:58:32,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-01-31 02:58:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:58:32,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:32,224 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:32,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 02:58:32,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:32,441 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -543637167, now seen corresponding path program 5 times [2022-01-31 02:58:32,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796253961] [2022-01-31 02:58:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:32,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:58:32,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796253961] [2022-01-31 02:58:32,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796253961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:32,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293159231] [2022-01-31 02:58:32,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:58:32,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:32,830 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) [2022-01-31 02:58:32,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 02:58:32,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-31 02:58:32,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:32,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 02:58:32,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:58:33,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 02:58:33,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293159231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:33,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:33,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-01-31 02:58:33,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773243844] [2022-01-31 02:58:33,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:33,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 02:58:33,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 02:58:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-31 02:58:33,345 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 18 states have internal predecessors, (66), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:33,670 INFO L93 Difference]: Finished difference Result 217 states and 291 transitions. [2022-01-31 02:58:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 02:58:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 18 states have internal predecessors, (66), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 02:58:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:33,671 INFO L225 Difference]: With dead ends: 217 [2022-01-31 02:58:33,672 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 02:58:33,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-01-31 02:58:33,672 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:33,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 02:58:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 02:58:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 02:58:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.3694581280788178) internal successors, (278), 203 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 282 transitions. [2022-01-31 02:58:33,694 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 282 transitions. Word has length 31 [2022-01-31 02:58:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:33,694 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 282 transitions. [2022-01-31 02:58:33,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 18 states have internal predecessors, (66), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 282 transitions. [2022-01-31 02:58:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:58:33,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:33,695 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:33,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:33,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:33,911 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash -604600770, now seen corresponding path program 4 times [2022-01-31 02:58:33,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:33,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613164101] [2022-01-31 02:58:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:33,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:34,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 02:58:34,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:34,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613164101] [2022-01-31 02:58:34,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613164101] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:34,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615095604] [2022-01-31 02:58:34,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:58:34,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:34,058 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) [2022-01-31 02:58:34,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 02:58:34,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:58:34,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 02:58:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 02:58:34,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 02:58:34,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615095604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:34,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:34,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-01-31 02:58:34,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414391279] [2022-01-31 02:58:34,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:34,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 02:58:34,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 02:58:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2022-01-31 02:58:34,245 INFO L87 Difference]: Start difference. First operand 208 states and 282 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:36,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:36,652 INFO L93 Difference]: Finished difference Result 376 states and 513 transitions. [2022-01-31 02:58:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 02:58:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 02:58:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:36,653 INFO L225 Difference]: With dead ends: 376 [2022-01-31 02:58:36,653 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 02:58:36,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=743, Invalid=5899, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 02:58:36,655 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 203 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:36,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 129 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 02:58:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 02:58:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 194. [2022-01-31 02:58:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.380952380952381) internal successors, (261), 189 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 265 transitions. [2022-01-31 02:58:36,678 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 265 transitions. Word has length 31 [2022-01-31 02:58:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:36,678 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 265 transitions. [2022-01-31 02:58:36,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 265 transitions. [2022-01-31 02:58:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:58:36,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:36,678 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:36,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:36,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:36,895 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1558438816, now seen corresponding path program 5 times [2022-01-31 02:58:36,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:36,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429926712] [2022-01-31 02:58:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:36,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:37,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:58:37,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429926712] [2022-01-31 02:58:37,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429926712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356853371] [2022-01-31 02:58:37,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:58:37,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:37,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:37,049 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) [2022-01-31 02:58:37,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 02:58:37,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 02:58:37,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 02:58:37,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:37,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 02:58:37,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356853371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:37,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:37,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-01-31 02:58:37,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241649551] [2022-01-31 02:58:37,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:37,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 02:58:37,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 02:58:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-01-31 02:58:37,304 INFO L87 Difference]: Start difference. First operand 194 states and 265 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:58:44,889 INFO L93 Difference]: Finished difference Result 380 states and 532 transitions. [2022-01-31 02:58:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 02:58:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 02:58:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:58:44,892 INFO L225 Difference]: With dead ends: 380 [2022-01-31 02:58:44,892 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 02:58:44,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6314 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1697, Invalid=16393, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 02:58:44,896 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 267 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 02:58:44,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 124 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 02:58:44,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 02:58:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2022-01-31 02:58:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.3710407239819005) internal successors, (303), 221 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 307 transitions. [2022-01-31 02:58:44,930 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 307 transitions. Word has length 31 [2022-01-31 02:58:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:58:44,931 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 307 transitions. [2022-01-31 02:58:44,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 02:58:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 307 transitions. [2022-01-31 02:58:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 02:58:44,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:58:44,936 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:58:44,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 02:58:45,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:45,140 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:58:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:58:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 112563583, now seen corresponding path program 5 times [2022-01-31 02:58:45,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:58:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402207285] [2022-01-31 02:58:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:58:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:58:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:58:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:58:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:58:45,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:58:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402207285] [2022-01-31 02:58:45,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402207285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:58:45,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244956013] [2022-01-31 02:58:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:58:45,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:58:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:58:45,334 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) [2022-01-31 02:58:45,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 02:58:45,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 02:58:45,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:58:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 02:58:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:58:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:58:45,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:58:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:58:46,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244956013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:58:46,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:58:46,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 02:58:46,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918629734] [2022-01-31 02:58:46,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:58:46,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 02:58:46,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:58:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 02:58:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 02:58:46,025 INFO L87 Difference]: Start difference. First operand 226 states and 307 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:35,645 INFO L93 Difference]: Finished difference Result 920 states and 1372 transitions. [2022-01-31 03:00:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 03:00:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 03:00:35,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:35,650 INFO L225 Difference]: With dead ends: 920 [2022-01-31 03:00:35,650 INFO L226 Difference]: Without dead ends: 879 [2022-01-31 03:00:35,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=6087, Invalid=19353, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 03:00:35,652 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1559 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:35,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 171 Invalid, 3723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 2368 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-01-31 03:00:35,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-31 03:00:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 257. [2022-01-31 03:00:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.380952380952381) internal successors, (348), 252 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 352 transitions. [2022-01-31 03:00:35,732 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 352 transitions. Word has length 31 [2022-01-31 03:00:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:35,732 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 352 transitions. [2022-01-31 03:00:35,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 33 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 352 transitions. [2022-01-31 03:00:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 03:00:35,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:35,734 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:35,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:35,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:35,939 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1990656643, now seen corresponding path program 6 times [2022-01-31 03:00:35,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493221622] [2022-01-31 03:00:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:35,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 03:00:36,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493221622] [2022-01-31 03:00:36,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493221622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68908751] [2022-01-31 03:00:36,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:00:36,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:36,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:36,044 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) [2022-01-31 03:00:36,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 03:00:36,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-31 03:00:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 03:00:36,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 03:00:36,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 03:00:36,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68908751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:36,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:36,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-31 03:00:36,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284028194] [2022-01-31 03:00:36,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:36,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 03:00:36,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 03:00:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 03:00:36,211 INFO L87 Difference]: Start difference. First operand 257 states and 352 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:36,387 INFO L93 Difference]: Finished difference Result 305 states and 411 transitions. [2022-01-31 03:00:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 03:00:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 03:00:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:36,389 INFO L225 Difference]: With dead ends: 305 [2022-01-31 03:00:36,389 INFO L226 Difference]: Without dead ends: 278 [2022-01-31 03:00:36,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-31 03:00:36,390 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:36,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 55 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 03:00:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-31 03:00:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 261. [2022-01-31 03:00:36,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.375) internal successors, (352), 256 states have internal predecessors, (352), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 356 transitions. [2022-01-31 03:00:36,421 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 356 transitions. Word has length 32 [2022-01-31 03:00:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:36,421 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 356 transitions. [2022-01-31 03:00:36,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:36,421 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 356 transitions. [2022-01-31 03:00:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 03:00:36,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:36,422 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:36,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:36,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:36,638 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:36,639 INFO L85 PathProgramCache]: Analyzing trace with hash 904933634, now seen corresponding path program 6 times [2022-01-31 03:00:36,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:36,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705295888] [2022-01-31 03:00:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:36,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 03:00:36,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705295888] [2022-01-31 03:00:36,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705295888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:36,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275188461] [2022-01-31 03:00:36,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:00:36,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:36,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:36,767 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) [2022-01-31 03:00:36,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 03:00:36,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 03:00:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:36,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 03:00:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 03:00:36,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 03:00:37,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275188461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:37,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:37,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-01-31 03:00:37,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888208491] [2022-01-31 03:00:37,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:37,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 03:00:37,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 03:00:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-01-31 03:00:37,108 INFO L87 Difference]: Start difference. First operand 261 states and 356 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:46,105 INFO L93 Difference]: Finished difference Result 627 states and 849 transitions. [2022-01-31 03:00:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 03:00:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 03:00:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:46,110 INFO L225 Difference]: With dead ends: 627 [2022-01-31 03:00:46,110 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 03:00:46,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5763 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3248, Invalid=12502, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 03:00:46,112 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 478 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:46,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 111 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 03:00:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 03:00:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 278. [2022-01-31 03:00:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.36996336996337) internal successors, (374), 273 states have internal predecessors, (374), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 378 transitions. [2022-01-31 03:00:46,173 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 378 transitions. Word has length 32 [2022-01-31 03:00:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:46,173 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 378 transitions. [2022-01-31 03:00:46,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 378 transitions. [2022-01-31 03:00:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 03:00:46,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:46,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:46,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-31 03:00:46,381 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,SelfDestructingSolverStorable24 [2022-01-31 03:00:46,381 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash 74673410, now seen corresponding path program 7 times [2022-01-31 03:00:46,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:46,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480113278] [2022-01-31 03:00:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:46,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:46,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 03:00:46,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480113278] [2022-01-31 03:00:46,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480113278] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:46,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628015009] [2022-01-31 03:00:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:00:46,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:46,490 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) [2022-01-31 03:00:46,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 03:00:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 03:00:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 03:00:46,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 03:00:46,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628015009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:46,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:46,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2022-01-31 03:00:46,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114489419] [2022-01-31 03:00:46,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:46,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 03:00:46,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 03:00:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-01-31 03:00:46,670 INFO L87 Difference]: Start difference. First operand 278 states and 378 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:47,169 INFO L93 Difference]: Finished difference Result 493 states and 712 transitions. [2022-01-31 03:00:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 03:00:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 03:00:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:47,170 INFO L225 Difference]: With dead ends: 493 [2022-01-31 03:00:47,171 INFO L226 Difference]: Without dead ends: 474 [2022-01-31 03:00:47,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2022-01-31 03:00:47,171 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 194 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:47,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 68 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 03:00:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-31 03:00:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 381. [2022-01-31 03:00:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.428191489361702) internal successors, (537), 376 states have internal predecessors, (537), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 541 transitions. [2022-01-31 03:00:47,221 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 541 transitions. Word has length 34 [2022-01-31 03:00:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:47,221 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 541 transitions. [2022-01-31 03:00:47,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 541 transitions. [2022-01-31 03:00:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 03:00:47,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:47,222 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:47,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-31 03:00:47,429 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,SelfDestructingSolverStorable25 [2022-01-31 03:00:47,429 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash 955015874, now seen corresponding path program 8 times [2022-01-31 03:00:47,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:47,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138705515] [2022-01-31 03:00:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:47,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 03:00:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138705515] [2022-01-31 03:00:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138705515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733698018] [2022-01-31 03:00:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:00:47,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:47,808 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) [2022-01-31 03:00:47,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 03:00:47,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:00:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 03:00:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 03:00:48,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 03:00:48,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733698018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:48,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:48,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 25 [2022-01-31 03:00:48,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168577739] [2022-01-31 03:00:48,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:48,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 03:00:48,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 03:00:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-31 03:00:48,472 INFO L87 Difference]: Start difference. First operand 381 states and 541 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 22 states have internal predecessors, (78), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:50,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:00:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:00:50,947 INFO L93 Difference]: Finished difference Result 391 states and 550 transitions. [2022-01-31 03:00:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 03:00:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 22 states have internal predecessors, (78), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 03:00:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:00:50,949 INFO L225 Difference]: With dead ends: 391 [2022-01-31 03:00:50,949 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 03:00:50,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 03:00:50,949 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:00:50,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 96 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 03:00:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 03:00:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-01-31 03:00:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 1.4444444444444444) internal successors, (520), 360 states have internal predecessors, (520), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 524 transitions. [2022-01-31 03:00:50,999 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 524 transitions. Word has length 36 [2022-01-31 03:00:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:00:50,999 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 524 transitions. [2022-01-31 03:00:50,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 22 states have internal predecessors, (78), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:00:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 524 transitions. [2022-01-31 03:00:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 03:00:51,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:00:51,000 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:00:51,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 03:00:51,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 03:00:51,217 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:00:51,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:00:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1930026878, now seen corresponding path program 6 times [2022-01-31 03:00:51,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:00:51,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973218427] [2022-01-31 03:00:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:00:51,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:00:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:51,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:00:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:00:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:00:51,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:00:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973218427] [2022-01-31 03:00:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973218427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:00:51,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097148079] [2022-01-31 03:00:51,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 03:00:51,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:00:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:00:51,428 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) [2022-01-31 03:00:51,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 03:00:51,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 03:00:51,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:00:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 03:00:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:00:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:00:51,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:00:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 03:00:52,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097148079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:00:52,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:00:52,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 38 [2022-01-31 03:00:52,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453040589] [2022-01-31 03:00:52,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:00:52,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 03:00:52,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:00:52,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 03:00:52,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 03:00:52,105 INFO L87 Difference]: Start difference. First operand 365 states and 524 transitions. Second operand has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:02,148 INFO L93 Difference]: Finished difference Result 947 states and 1296 transitions. [2022-01-31 03:01:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 03:01:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 03:01:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:02,150 INFO L225 Difference]: With dead ends: 947 [2022-01-31 03:01:02,150 INFO L226 Difference]: Without dead ends: 897 [2022-01-31 03:01:02,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10587 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=4463, Invalid=25293, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 03:01:02,154 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 471 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:02,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 129 Invalid, 2585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 03:01:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-31 03:01:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 429. [2022-01-31 03:01:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 424 states have (on average 1.4504716981132075) internal successors, (615), 424 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 619 transitions. [2022-01-31 03:01:02,218 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 619 transitions. Word has length 36 [2022-01-31 03:01:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:02,218 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 619 transitions. [2022-01-31 03:01:02,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 619 transitions. [2022-01-31 03:01:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 03:01:02,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:02,219 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:02,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:02,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:02,424 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1644820974, now seen corresponding path program 7 times [2022-01-31 03:01:02,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:02,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113773628] [2022-01-31 03:01:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:02,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:02,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 03:01:02,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113773628] [2022-01-31 03:01:02,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113773628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92579515] [2022-01-31 03:01:02,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:01:02,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:02,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:02,558 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) [2022-01-31 03:01:02,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 03:01:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 03:01:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 03:01:02,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-31 03:01:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92579515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:02,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:02,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-31 03:01:02,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474581381] [2022-01-31 03:01:02,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:02,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 03:01:02,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 03:01:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2022-01-31 03:01:02,841 INFO L87 Difference]: Start difference. First operand 429 states and 619 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:01:31,247 INFO L93 Difference]: Finished difference Result 986 states and 1379 transitions. [2022-01-31 03:01:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 03:01:31,247 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 03:01:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:01:31,249 INFO L225 Difference]: With dead ends: 986 [2022-01-31 03:01:31,249 INFO L226 Difference]: Without dead ends: 921 [2022-01-31 03:01:31,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14071 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=6269, Invalid=29641, Unknown=0, NotChecked=0, Total=35910 [2022-01-31 03:01:31,251 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 524 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 03:01:31,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 137 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2011 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 03:01:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-31 03:01:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 482. [2022-01-31 03:01:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 477 states have (on average 1.4360587002096437) internal successors, (685), 477 states have internal predecessors, (685), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 689 transitions. [2022-01-31 03:01:31,348 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 689 transitions. Word has length 36 [2022-01-31 03:01:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:01:31,348 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 689 transitions. [2022-01-31 03:01:31,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 689 transitions. [2022-01-31 03:01:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 03:01:31,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:01:31,349 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:01:31,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 03:01:31,563 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,SelfDestructingSolverStorable28 [2022-01-31 03:01:31,564 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:01:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:01:31,564 INFO L85 PathProgramCache]: Analyzing trace with hash 319091791, now seen corresponding path program 8 times [2022-01-31 03:01:31,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:01:31,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689659044] [2022-01-31 03:01:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:01:31,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:01:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:31,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:01:31,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:01:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 03:01:31,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:01:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689659044] [2022-01-31 03:01:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689659044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:01:31,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792045596] [2022-01-31 03:01:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 03:01:31,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:01:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:01:31,807 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) [2022-01-31 03:01:31,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 03:01:31,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 03:01:31,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:01:31,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 03:01:31,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:01:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 03:01:31,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:01:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 03:01:32,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792045596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:01:32,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:01:32,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-01-31 03:01:32,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835973471] [2022-01-31 03:01:32,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:01:32,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 03:01:32,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:01:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 03:01:32,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 03:01:32,401 INFO L87 Difference]: Start difference. First operand 482 states and 689 transitions. Second operand has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 41 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:01:49,193 WARN L228 SmtUtils]: Spent 9.69s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:01,171 WARN L228 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:02:28,109 WARN L228 SmtUtils]: Spent 18.63s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:02,371 WARN L228 SmtUtils]: Spent 13.34s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:21,912 WARN L228 SmtUtils]: Spent 14.72s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:41,138 WARN L228 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:03:48,882 WARN L228 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:02,899 WARN L228 SmtUtils]: Spent 6.88s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:31,937 WARN L228 SmtUtils]: Spent 11.15s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:41,836 WARN L228 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:04:51,564 WARN L228 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:05:07,450 WARN L228 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:05:33,954 WARN L228 SmtUtils]: Spent 9.64s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:06:05,702 WARN L228 SmtUtils]: Spent 7.32s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:06:16,807 WARN L228 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:06:25,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:06:27,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:06:55,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:07:21,649 WARN L228 SmtUtils]: Spent 6.49s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:08:32,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:08:44,406 WARN L228 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:09:05,590 WARN L228 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:09:20,451 WARN L228 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:09:38,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:09:44,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:09:47,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:09:57,746 WARN L228 SmtUtils]: Spent 5.00s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:10:12,347 WARN L228 SmtUtils]: Spent 7.35s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:10:22,040 WARN L228 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:10:34,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:10:36,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:10:37,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:10:38,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:10:41,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:10:56,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 03:10:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:10:57,675 INFO L93 Difference]: Finished difference Result 2307 states and 3586 transitions. [2022-01-31 03:10:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2022-01-31 03:10:57,676 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 41 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 03:10:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:10:57,680 INFO L225 Difference]: With dead ends: 2307 [2022-01-31 03:10:57,681 INFO L226 Difference]: Without dead ends: 2233 [2022-01-31 03:10:57,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28602 ImplicationChecksByTransitivity, 511.1s TimeCoverageRelationStatistics Valid=14619, Invalid=57467, Unknown=6, NotChecked=0, Total=72092 [2022-01-31 03:10:57,686 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1964 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 2618 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 6976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2618 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:10:57,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1964 Valid, 197 Invalid, 6976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2618 Valid, 4354 Invalid, 4 Unknown, 0 Unchecked, 54.2s Time] [2022-01-31 03:10:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-01-31 03:10:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 460. [2022-01-31 03:10:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.4373626373626374) internal successors, (654), 455 states have internal predecessors, (654), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 658 transitions. [2022-01-31 03:10:57,771 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 658 transitions. Word has length 37 [2022-01-31 03:10:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:10:57,771 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 658 transitions. [2022-01-31 03:10:57,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 41 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:10:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 658 transitions. [2022-01-31 03:10:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 03:10:57,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:10:57,772 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:10:57,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-31 03:10:57,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:10:57,983 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:10:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:10:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 555171124, now seen corresponding path program 7 times [2022-01-31 03:10:57,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:10:57,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603868787] [2022-01-31 03:10:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:10:57,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:10:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:58,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:10:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 03:10:58,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:10:58,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603868787] [2022-01-31 03:10:58,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603868787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:10:58,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671100261] [2022-01-31 03:10:58,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 03:10:58,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:10:58,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:10:58,228 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:10:58,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 03:10:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:10:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 03:10:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:10:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 03:10:58,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:10:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 03:10:59,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671100261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:10:59,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:10:59,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-01-31 03:10:59,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647404758] [2022-01-31 03:10:59,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:10:59,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 03:10:59,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:10:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 03:10:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 03:10:59,003 INFO L87 Difference]: Start difference. First operand 460 states and 658 transitions. Second operand has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:11:19,554 INFO L93 Difference]: Finished difference Result 1205 states and 1633 transitions. [2022-01-31 03:11:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-01-31 03:11:19,554 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 03:11:19,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:11:19,557 INFO L225 Difference]: With dead ends: 1205 [2022-01-31 03:11:19,557 INFO L226 Difference]: Without dead ends: 1160 [2022-01-31 03:11:19,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17939 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=6873, Invalid=40869, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 03:11:19,560 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 607 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 4064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-31 03:11:19,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [607 Valid, 167 Invalid, 4064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 3019 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-01-31 03:11:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-01-31 03:11:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 488. [2022-01-31 03:11:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.4202898550724639) internal successors, (686), 483 states have internal predecessors, (686), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 690 transitions. [2022-01-31 03:11:19,670 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 690 transitions. Word has length 38 [2022-01-31 03:11:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:11:19,670 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 690 transitions. [2022-01-31 03:11:19,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.372093023255814) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 690 transitions. [2022-01-31 03:11:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:11:19,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:11:19,671 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:11:19,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-31 03:11:19,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-31 03:11:19,888 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:11:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:11:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash -770012495, now seen corresponding path program 9 times [2022-01-31 03:11:19,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:11:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446053232] [2022-01-31 03:11:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:11:19,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:11:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:11:20,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:11:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:11:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 03:11:20,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:11:20,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446053232] [2022-01-31 03:11:20,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446053232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:11:20,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311428473] [2022-01-31 03:11:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 03:11:20,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:11:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:11:20,042 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:11:20,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 03:11:20,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 03:11:20,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:11:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 03:11:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:11:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 03:11:20,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:11:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 03:11:20,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311428473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:11:20,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:11:20,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 25 [2022-01-31 03:11:20,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823480695] [2022-01-31 03:11:20,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:11:20,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 03:11:20,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:11:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 03:11:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2022-01-31 03:11:20,442 INFO L87 Difference]: Start difference. First operand 488 states and 690 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 03:11:32,081 INFO L93 Difference]: Finished difference Result 934 states and 1372 transitions. [2022-01-31 03:11:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 03:11:32,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 03:11:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 03:11:32,083 INFO L225 Difference]: With dead ends: 934 [2022-01-31 03:11:32,083 INFO L226 Difference]: Without dead ends: 908 [2022-01-31 03:11:32,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1062, Invalid=3097, Unknown=1, NotChecked=0, Total=4160 [2022-01-31 03:11:32,085 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 376 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 03:11:32,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 93 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 03:11:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-31 03:11:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 629. [2022-01-31 03:11:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 624 states have (on average 1.453525641025641) internal successors, (907), 624 states have internal predecessors, (907), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 911 transitions. [2022-01-31 03:11:32,239 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 911 transitions. Word has length 39 [2022-01-31 03:11:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 03:11:32,239 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 911 transitions. [2022-01-31 03:11:32,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 911 transitions. [2022-01-31 03:11:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 03:11:32,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 03:11:32,240 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 03:11:32,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-31 03:11:32,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:11:32,472 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 03:11:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 03:11:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -408916639, now seen corresponding path program 10 times [2022-01-31 03:11:32,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 03:11:32,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903900369] [2022-01-31 03:11:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 03:11:32,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 03:11:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:11:32,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 03:11:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 03:11:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 03:11:32,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 03:11:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903900369] [2022-01-31 03:11:32,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903900369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 03:11:32,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130116266] [2022-01-31 03:11:32,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 03:11:32,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 03:11:32,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 03:11:32,743 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 03:11:32,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 03:11:32,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 03:11:32,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 03:11:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 03:11:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 03:11:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 03:11:32,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 03:11:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 03:11:33,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130116266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 03:11:33,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 03:11:33,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-01-31 03:11:33,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084367680] [2022-01-31 03:11:33,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 03:11:33,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 03:11:33,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 03:11:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 03:11:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1506, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 03:11:33,489 INFO L87 Difference]: Start difference. First operand 629 states and 911 transitions. Second operand has 44 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 43 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 03:11:59,742 WARN L228 SmtUtils]: Spent 9.70s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 03:12:16,684 WARN L228 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)