/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/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:57:34,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:57:34,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:57:34,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:57:34,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 12:57:34,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 12:57:34,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 12:57:34,998 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 [2022-03-18 12:57:35,022 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:57:35,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:57:35,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:57:35,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:57:35,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:57:35,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:57:35,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:57:35,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:57:35,025 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:57:35,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:57:35,025 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:57:35,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:57:35,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:57:35,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:57:35,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:57:35,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:57:35,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:57:35,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:57:35,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:57:35,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:57:35,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:57:35,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:57:35,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:57:35,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:57:35,028 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:57:35,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:57:35,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:57:35,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:57:35,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:57:35,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:57:35,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:57:35,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:57:35,207 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:57:35,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2022-03-18 12:57:35,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e07e5786/96e235e8f49a41d9a978cfcad300b54a/FLAG40c647ad4 [2022-03-18 12:57:35,572 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:57:35,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2022-03-18 12:57:35,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e07e5786/96e235e8f49a41d9a978cfcad300b54a/FLAG40c647ad4 [2022-03-18 12:57:35,587 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e07e5786/96e235e8f49a41d9a978cfcad300b54a [2022-03-18 12:57:35,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:57:35,591 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:57:35,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:57:35,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:57:35,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:57:35,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ec804f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35, skipping insertion in model container [2022-03-18 12:57:35,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:57:35,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:57:35,736 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/sumt5.c[403,416] [2022-03-18 12:57:35,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:57:35,752 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:57:35,760 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/sumt5.c[403,416] [2022-03-18 12:57:35,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:57:35,772 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:57:35,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35 WrapperNode [2022-03-18 12:57:35,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:57:35,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:57:35,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:57:35,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:57:35,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,792 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:57:35,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:57:35,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:57:35,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:57:35,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (1/1) ... [2022-03-18 12:57:35,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:57:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:57:35,818 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 12:57:35,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 12:57:35,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:57:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:57:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:57:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 12:57:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:57:35,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:57:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:57:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:57:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:57:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:57:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:57:35,884 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:57:35,885 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:57:40,366 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:57:40,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:57:40,370 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 12:57:40,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:57:40 BoogieIcfgContainer [2022-03-18 12:57:40,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:57:40,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:57:40,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:57:40,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:57:40,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:57:35" (1/3) ... [2022-03-18 12:57:40,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fcc81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:57:40, skipping insertion in model container [2022-03-18 12:57:40,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:57:35" (2/3) ... [2022-03-18 12:57:40,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fcc81f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:57:40, skipping insertion in model container [2022-03-18 12:57:40,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:57:40" (3/3) ... [2022-03-18 12:57:40,378 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2022-03-18 12:57:40,381 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:57:40,382 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:57:40,413 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:57:40,418 INFO L340 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 [2022-03-18 12:57:40,418 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:57:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2022-03-18 12:57:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 12:57:40,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:57:40,434 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:57:40,435 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:57:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:57:40,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1530412705, now seen corresponding path program 1 times [2022-03-18 12:57:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:57:40,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586329574] [2022-03-18 12:57:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:57:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:57:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:40,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:57:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:57:40,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:57:40,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586329574] [2022-03-18 12:57:40,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586329574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:57:40,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:57:40,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 12:57:40,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674276267] [2022-03-18 12:57:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:57:40,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:57:40,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:57:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:57:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:57:40,943 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 12:57:43,040 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 [] [2022-03-18 12:57:45,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:57:47,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:57:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:57:47,713 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-03-18 12:57:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:57:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-03-18 12:57:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:57:47,719 INFO L225 Difference]: With dead ends: 47 [2022-03-18 12:57:47,719 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 12:57:47,721 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 12:57:47,723 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-18 12:57:47,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-03-18 12:57:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 12:57:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-18 12:57:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-03-18 12:57:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-03-18 12:57:47,744 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-03-18 12:57:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:57:47,745 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-03-18 12:57:47,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 12:57:47,745 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-03-18 12:57:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 12:57:47,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:57:47,745 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:57:47,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:57:47,746 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:57:47,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:57:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1637920365, now seen corresponding path program 1 times [2022-03-18 12:57:47,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:57:47,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604408147] [2022-03-18 12:57:47,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:57:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:57:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:48,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:57:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:57:48,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:57:48,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604408147] [2022-03-18 12:57:48,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604408147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:57:48,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263719444] [2022-03-18 12:57:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:57:48,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:57:48,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:57:48,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:57:48,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:57:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:48,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 12:57:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:57:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:57:48,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:57:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 12:57:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263719444] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:57:48,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:57:48,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 16 [2022-03-18 12:57:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025665517] [2022-03-18 12:57:48,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:57:48,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:57:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:57:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:57:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 12:57:48,739 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:57:50,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:57:52,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:57:55,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:57:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:57:55,319 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-03-18 12:57:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:57:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 15 [2022-03-18 12:57:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:57:55,320 INFO L225 Difference]: With dead ends: 27 [2022-03-18 12:57:55,320 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 12:57:55,321 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-18 12:57:55,322 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:57:55,322 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-03-18 12:57:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 12:57:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 12:57:55,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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) [2022-03-18 12:57:55,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-03-18 12:57:55,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2022-03-18 12:57:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:57:55,325 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-03-18 12:57:55,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:57:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-03-18 12:57:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:57:55,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:57:55,326 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:57:55,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 12:57:55,535 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:57:55,536 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:57:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:57:55,536 INFO L85 PathProgramCache]: Analyzing trace with hash -469553554, now seen corresponding path program 1 times [2022-03-18 12:57:55,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:57:55,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445676133] [2022-03-18 12:57:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:57:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:57:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:55,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:57:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:57:55,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:57:55,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445676133] [2022-03-18 12:57:55,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445676133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:57:55,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:57:55,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 12:57:55,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747578405] [2022-03-18 12:57:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:57:55,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 12:57:55,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:57:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 12:57:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-18 12:57:55,766 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-18 12:57:55,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:57:55,886 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-03-18 12:57:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:57:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 16 [2022-03-18 12:57:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:57:55,887 INFO L225 Difference]: With dead ends: 35 [2022-03-18 12:57:55,887 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 12:57:55,888 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:57:55,888 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:57:55,889 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 28 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:57:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 12:57:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-18 12:57:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-18 12:57:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-18 12:57:55,892 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2022-03-18 12:57:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:57:55,892 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-18 12:57:55,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-03-18 12:57:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-18 12:57:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 12:57:55,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:57:55,893 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:57:55,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 12:57:55,893 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:57:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:57:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1646864326, now seen corresponding path program 1 times [2022-03-18 12:57:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:57:55,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708460062] [2022-03-18 12:57:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:57:55,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:57:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:55,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:57:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:57:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:57:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708460062] [2022-03-18 12:57:55,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708460062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:57:55,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205783150] [2022-03-18 12:57:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:57:55,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:57:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:57:55,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:57:55,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:57:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:57:56,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 12:57:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:57:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:57:56,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:57:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 12:57:56,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205783150] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:57:56,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:57:56,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-18 12:57:56,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480395089] [2022-03-18 12:57:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:57:56,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:57:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:57:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:57:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:57:56,471 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:57:58,491 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 [] [2022-03-18 12:58:00,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:58:02,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:58:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:58:03,008 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-03-18 12:58:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:58:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 19 [2022-03-18 12:58:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:58:03,009 INFO L225 Difference]: With dead ends: 33 [2022-03-18 12:58:03,009 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 12:58:03,010 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:58:03,010 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:58:03,011 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-03-18 12:58:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 12:58:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-03-18 12:58:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-03-18 12:58:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-03-18 12:58:03,014 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-03-18 12:58:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:58:03,014 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-03-18 12:58:03,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:03,014 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-03-18 12:58:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 12:58:03,015 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:58:03,015 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:58:03,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:58:03,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 12:58:03,224 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:58:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:58:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 923887238, now seen corresponding path program 1 times [2022-03-18 12:58:03,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:58:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919075728] [2022-03-18 12:58:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:58:03,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:58:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:58:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:58:03,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:58:03,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919075728] [2022-03-18 12:58:03,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919075728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:58:03,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747349330] [2022-03-18 12:58:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:58:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:58:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:58:03,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:58:03,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:58:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:03,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 12:58:03,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:58:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:58:04,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:58:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 12:58:04,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747349330] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:58:04,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:58:04,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 9] total 20 [2022-03-18 12:58:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481580871] [2022-03-18 12:58:04,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:58:04,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:58:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:58:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:58:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-18 12:58:04,325 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:06,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:58:08,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:58:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:58:08,750 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-03-18 12:58:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:58:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 20 [2022-03-18 12:58:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:58:08,751 INFO L225 Difference]: With dead ends: 34 [2022-03-18 12:58:08,751 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 12:58:08,751 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:58:08,752 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:58:08,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-03-18 12:58:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 12:58:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-03-18 12:58:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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) [2022-03-18 12:58:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-03-18 12:58:08,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 20 [2022-03-18 12:58:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:58:08,755 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-03-18 12:58:08,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-03-18 12:58:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 12:58:08,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:58:08,756 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:58:08,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 12:58:08,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:58:08,968 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:58:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:58:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash -844641793, now seen corresponding path program 1 times [2022-03-18 12:58:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:58:08,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783601920] [2022-03-18 12:58:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:58:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:58:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:09,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:58:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:58:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:58:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783601920] [2022-03-18 12:58:09,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783601920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:58:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362192694] [2022-03-18 12:58:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:58:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:58:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:58:09,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:58:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:09,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 12:58:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 12:58:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:58:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:58:09,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:58:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 12:58:09,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362192694] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:58:09,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:58:09,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-18 12:58:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652134272] [2022-03-18 12:58:09,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:58:09,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:58:09,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:58:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:58:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 12:58:09,555 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:11,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:58:13,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-18 12:58:15,871 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 [] [2022-03-18 12:58:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:58:16,111 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-03-18 12:58:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:58:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 21 [2022-03-18 12:58:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:58:16,112 INFO L225 Difference]: With dead ends: 41 [2022-03-18 12:58:16,112 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 12:58:16,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:58:16,113 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:58:16,114 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-03-18 12:58:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 12:58:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-18 12:58:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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) [2022-03-18 12:58:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2022-03-18 12:58:16,118 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 21 [2022-03-18 12:58:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:58:16,118 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2022-03-18 12:58:16,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2022-03-18 12:58:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:58:16,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:58:16,119 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:58:16,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 12:58:16,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:58:16,335 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:58:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:58:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1948928856, now seen corresponding path program 1 times [2022-03-18 12:58:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:58:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284468672] [2022-03-18 12:58:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:58:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:58:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:16,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:58:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:58:16,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:58:16,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284468672] [2022-03-18 12:58:16,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284468672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:58:16,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045656742] [2022-03-18 12:58:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:58:16,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:58:16,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:58:16,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:58:16,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 12:58:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:58:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 12:58:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:58:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:58:17,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:58:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 12:58:17,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045656742] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 12:58:17,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:58:17,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 11] total 23 [2022-03-18 12:58:17,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760211465] [2022-03-18 12:58:17,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:58:17,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:58:17,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:58:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:58:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-18 12:58:17,554 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:19,573 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 [] [2022-03-18 12:58:21,771 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 [] [2022-03-18 12:58:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:58:21,979 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-03-18 12:58:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:58:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 26 [2022-03-18 12:58:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:58:21,979 INFO L225 Difference]: With dead ends: 36 [2022-03-18 12:58:21,979 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 12:58:21,980 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-03-18 12:58:21,980 INFO L912 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:58:21,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-03-18 12:58:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 12:58:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 12:58:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 12:58:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 12:58:21,981 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-03-18 12:58:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:58:21,981 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 12:58:21,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:58:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 12:58:21,981 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 12:58:21,983 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 12:58:21,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 12:58:22,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:58:22,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 5 7) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point L29(lines 29 32) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point L27(lines 27 32) no Hoare annotation was computed. [2022-03-18 12:58:22,290 INFO L882 garLoopResultBuilder]: For program point L29-2(lines 23 32) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point L25(lines 25 32) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 16 37) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point L23(lines 23 32) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L878 garLoopResultBuilder]: At program point L21-2(lines 21 34) the Hoare annotation is: (or (= (mod main_~l~0 4294967296) (mod (+ main_~i~0 main_~k~0 main_~j~0 main_~v3~0 main_~v4~0) 4294967296)) (not (<= 20000001 ~SIZE~0)) (not (<= ~SIZE~0 20000001))) [2022-03-18 12:58:22,291 INFO L878 garLoopResultBuilder]: At program point L21-3(lines 21 34) the Hoare annotation is: (or (= (mod main_~l~0 4294967296) (mod (+ main_~i~0 main_~k~0 main_~j~0 main_~v3~0 main_~v4~0) 4294967296)) (not (<= 20000001 ~SIZE~0)) (not (<= ~SIZE~0 20000001))) [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 16 37) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 16 37) the Hoare annotation is: true [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(~SIZE~0)| ~SIZE~0) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 12:58:22,291 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2022-03-18 12:58:22,291 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 12:58:22,291 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 12:58:22,292 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2022-03-18 12:58:22,292 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-03-18 12:58:22,292 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 8 13) no Hoare annotation was computed. [2022-03-18 12:58:22,292 INFO L882 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2022-03-18 12:58:22,292 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 13) no Hoare annotation was computed. [2022-03-18 12:58:22,292 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2022-03-18 12:58:22,294 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:58:22,295 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 12:58:22,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:58:22 BoogieIcfgContainer [2022-03-18 12:58:22,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 12:58:22,305 INFO L158 Benchmark]: Toolchain (without parser) took 46714.52ms. Allocated memory was 180.4MB in the beginning and 222.3MB in the end (delta: 41.9MB). Free memory was 121.8MB in the beginning and 97.6MB in the end (delta: 24.3MB). Peak memory consumption was 66.3MB. Max. memory is 8.0GB. [2022-03-18 12:58:22,305 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory is still 138.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 12:58:22,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.57ms. Allocated memory was 180.4MB in the beginning and 222.3MB in the end (delta: 41.9MB). Free memory was 121.6MB in the beginning and 193.0MB in the end (delta: -71.3MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-03-18 12:58:22,306 INFO L158 Benchmark]: Boogie Preprocessor took 19.56ms. Allocated memory is still 222.3MB. Free memory was 193.0MB in the beginning and 191.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 12:58:22,306 INFO L158 Benchmark]: RCFGBuilder took 4577.90ms. Allocated memory is still 222.3MB. Free memory was 191.4MB in the beginning and 179.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 12:58:22,306 INFO L158 Benchmark]: TraceAbstraction took 41932.32ms. Allocated memory is still 222.3MB. Free memory was 178.8MB in the beginning and 97.6MB in the end (delta: 81.2MB). Peak memory consumption was 81.7MB. Max. memory is 8.0GB. [2022-03-18 12:58:22,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 180.4MB. Free memory is still 138.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 178.57ms. Allocated memory was 180.4MB in the beginning and 222.3MB in the end (delta: 41.9MB). Free memory was 121.6MB in the beginning and 193.0MB in the end (delta: -71.3MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.56ms. Allocated memory is still 222.3MB. Free memory was 193.0MB in the beginning and 191.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 4577.90ms. Allocated memory is still 222.3MB. Free memory was 191.4MB in the beginning and 179.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 41932.32ms. Allocated memory is still 222.3MB. Free memory was 178.8MB in the beginning and 97.6MB in the end (delta: 81.2MB). Peak memory consumption was 81.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 41.9s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 35.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 16 mSolverCounterUnknown, 84 SdHoareTripleChecker+Valid, 35.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 83 mSDsluCounter, 320 SdHoareTripleChecker+Invalid, 32.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 334 IncrementalHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 97 mSDtfsCounter, 334 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 160 SyntacticMatches, 15 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 20 NumberOfFragments, 62 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 277 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 314 ConstructedInterpolants, 0 QuantifiedInterpolants, 3391 SizeOfPredicates, 5 NumberOfNonLiveVariables, 441 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 37/91 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (l % 4294967296 == (i + k + j + v3 + v4) % 4294967296 || !(20000001 <= SIZE)) || !(SIZE <= 20000001) RESULT: Ultimate proved your program to be correct! [2022-03-18 12:58:22,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...