/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/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 11:44:57,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 11:44:57,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 11:44:57,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 11:44:57,462 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 11:44:57,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 11:44:57,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 11:44:57,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 11:44:57,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 11:44:57,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 11:44:57,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 11:44:57,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 11:44:57,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 11:44:57,487 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 11:44:57,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 11:44:57,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 11:44:57,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 11:44:57,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 11:44:57,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 11:44:57,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 11:44:57,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 11:44:57,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 11:44:57,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 11:44:57,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 11:44:57,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 11:44:57,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 11:44:57,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 11:44:57,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 11:44:57,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 11:44:57,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:44:57,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 11:44:57,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 11:44:57,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 11:44:57,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 11:44:57,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 11:44:57,492 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 11:44:57,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 11:44:57,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 11:44:57,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 11:44:57,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 11:44:57,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 11:44:57,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 11:44:57,688 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 11:44:57,689 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 11:44:57,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-03-18 11:44:57,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f5cd55f/aee874aee6da4febb9c091c43966fc83/FLAG167772728 [2022-03-18 11:44:58,086 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 11:44:58,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-03-18 11:44:58,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f5cd55f/aee874aee6da4febb9c091c43966fc83/FLAG167772728 [2022-03-18 11:44:58,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f5cd55f/aee874aee6da4febb9c091c43966fc83 [2022-03-18 11:44:58,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 11:44:58,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 11:44:58,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 11:44:58,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 11:44:58,119 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 11:44:58,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19af1dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58, skipping insertion in model container [2022-03-18 11:44:58,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 11:44:58,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 11:44:58,271 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/vogal-1.i[895,908] [2022-03-18 11:44:58,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:44:58,321 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 11:44:58,331 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/vogal-1.i[895,908] [2022-03-18 11:44:58,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:44:58,373 INFO L208 MainTranslator]: Completed translation [2022-03-18 11:44:58,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58 WrapperNode [2022-03-18 11:44:58,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 11:44:58,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 11:44:58,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 11:44:58,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 11:44:58,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 11:44:58,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 11:44:58,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 11:44:58,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 11:44:58,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (1/1) ... [2022-03-18 11:44:58,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:44:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:44:58,475 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 11:44:58,481 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 11:44:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 11:44:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 11:44:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 11:44:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 11:44:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 11:44:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 11:44:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 11:44:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 11:44:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 11:44:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 11:44:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 11:44:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 11:44:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 11:44:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 11:44:58,590 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 11:44:58,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 11:44:58,758 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 11:44:58,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 11:44:58,762 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-03-18 11:44:58,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:44:58 BoogieIcfgContainer [2022-03-18 11:44:58,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 11:44:58,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 11:44:58,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 11:44:58,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 11:44:58,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:44:58" (1/3) ... [2022-03-18 11:44:58,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680395ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:44:58, skipping insertion in model container [2022-03-18 11:44:58,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:44:58" (2/3) ... [2022-03-18 11:44:58,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@680395ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:44:58, skipping insertion in model container [2022-03-18 11:44:58,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:44:58" (3/3) ... [2022-03-18 11:44:58,771 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-03-18 11:44:58,775 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 11:44:58,775 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 11:44:58,828 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 11:44:58,847 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 11:44:58,847 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 11:44:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 11:44:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 11:44:58,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:44:58,875 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:44:58,875 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:44:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:44:58,879 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-03-18 11:44:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:44:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083534244] [2022-03-18 11:44:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:44:58,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:44:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:44:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,101 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 11:44:59,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:44:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083534244] [2022-03-18 11:44:59,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083534244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:44:59,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:44:59,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 11:44:59,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157428201] [2022-03-18 11:44:59,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:44:59,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 11:44:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:44:59,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 11:44:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:44:59,131 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 11:44:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:44:59,179 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-03-18 11:44:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 11:44:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 18 [2022-03-18 11:44:59,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:44:59,187 INFO L225 Difference]: With dead ends: 66 [2022-03-18 11:44:59,187 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 11:44:59,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:44:59,192 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:44:59,192 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:44:59,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 11:44:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 11:44:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 11:44:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-03-18 11:44:59,215 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-03-18 11:44:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:44:59,215 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-03-18 11:44:59,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 11:44:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-03-18 11:44:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 11:44:59,216 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:44:59,216 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:44:59,216 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 11:44:59,216 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:44:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:44:59,217 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-03-18 11:44:59,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:44:59,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143258386] [2022-03-18 11:44:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:44:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:44:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:44:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,280 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 11:44:59,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:44:59,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143258386] [2022-03-18 11:44:59,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143258386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:44:59,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:44:59,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:44:59,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409455149] [2022-03-18 11:44:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:44:59,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:44:59,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:44:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:44:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:44:59,284 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 11:44:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:44:59,399 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-03-18 11:44:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:44:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2022-03-18 11:44:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:44:59,401 INFO L225 Difference]: With dead ends: 67 [2022-03-18 11:44:59,401 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 11:44:59,401 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:44:59,402 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:44:59,402 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:44:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 11:44:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-03-18 11:44:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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 11:44:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-03-18 11:44:59,407 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-03-18 11:44:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:44:59,407 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-03-18 11:44:59,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 11:44:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-03-18 11:44:59,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 11:44:59,408 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:44:59,408 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:44:59,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 11:44:59,408 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:44:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:44:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-03-18 11:44:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:44:59,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962119345] [2022-03-18 11:44:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:44:59,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:44:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:44:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,496 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 11:44:59,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:44:59,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962119345] [2022-03-18 11:44:59,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962119345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:44:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991413149] [2022-03-18 11:44:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:44:59,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:44:59,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:44:59,499 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 11:44:59,510 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 11:44:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:44:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 11:44:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:44:59,641 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 11:44:59,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 11:44:59,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991413149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:44:59,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 11:44:59,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-18 11:44:59,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809694258] [2022-03-18 11:44:59,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:44:59,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 11:44:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:44:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 11:44:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 11:44:59,643 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 11:44:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:44:59,664 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-03-18 11:44:59,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 11:44:59,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2022-03-18 11:44:59,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:44:59,665 INFO L225 Difference]: With dead ends: 55 [2022-03-18 11:44:59,665 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 11:44:59,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 11:44:59,667 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:44:59,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 154 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:44:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 11:44:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-03-18 11:44:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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 11:44:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-03-18 11:44:59,672 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-03-18 11:44:59,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:44:59,672 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-03-18 11:44:59,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 11:44:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-03-18 11:44:59,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 11:44:59,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:44:59,673 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:44:59,702 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 11:44:59,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:44:59,889 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:44:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:44:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 1 times [2022-03-18 11:44:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:44:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787624412] [2022-03-18 11:44:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:44:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:44:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 11:45:00,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:00,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787624412] [2022-03-18 11:45:00,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787624412] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:00,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14453947] [2022-03-18 11:45:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:00,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:00,011 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 11:45:00,015 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 11:45:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:00,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 11:45:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 11:45:00,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 11:45:00,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14453947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:45:00,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 11:45:00,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-03-18 11:45:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257015857] [2022-03-18 11:45:00,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:45:00,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:45:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:45:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 11:45:00,148 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 11:45:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:00,195 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-03-18 11:45:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:45:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 28 [2022-03-18 11:45:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:00,198 INFO L225 Difference]: With dead ends: 100 [2022-03-18 11:45:00,198 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 11:45:00,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 11:45:00,199 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:00,199 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 88 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:45:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 11:45:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-03-18 11:45:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 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 11:45:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-03-18 11:45:00,211 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2022-03-18 11:45:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:00,212 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-03-18 11:45:00,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 11:45:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-03-18 11:45:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 11:45:00,213 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:00,213 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:00,236 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 11:45:00,426 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 11:45:00,427 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 1 times [2022-03-18 11:45:00,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:00,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421863208] [2022-03-18 11:45:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:00,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:00,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 11:45:00,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421863208] [2022-03-18 11:45:00,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421863208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:00,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107004781] [2022-03-18 11:45:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:00,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:00,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:00,522 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 11:45:00,523 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 11:45:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:00,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 11:45:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:00,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-18 11:45:00,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-18 11:45:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:45:00,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 11:45:00,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107004781] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:00,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 11:45:00,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-18 11:45:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873466356] [2022-03-18 11:45:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:45:00,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 11:45:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 11:45:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-18 11:45:00,846 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 11:45:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:00,941 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-03-18 11:45:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 11:45:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 29 [2022-03-18 11:45:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:00,942 INFO L225 Difference]: With dead ends: 67 [2022-03-18 11:45:00,942 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 11:45:00,943 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-18 11:45:00,943 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:00,944 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:45:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 11:45:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-18 11:45:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 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 11:45:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-03-18 11:45:00,948 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2022-03-18 11:45:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:00,948 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-03-18 11:45:00,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 11:45:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-03-18 11:45:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 11:45:00,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:00,949 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:00,967 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 11:45:01,162 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 11:45:01,163 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 1 times [2022-03-18 11:45:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862786465] [2022-03-18 11:45:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:01,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 11:45:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862786465] [2022-03-18 11:45:01,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862786465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736790089] [2022-03-18 11:45:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:01,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:01,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:01,217 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 11:45:01,219 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 11:45:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:01,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 11:45:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:01,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-18 11:45:01,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-18 11:45:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 11:45:01,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-18 11:45:01,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736790089] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:01,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 11:45:01,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-03-18 11:45:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605556338] [2022-03-18 11:45:01,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:45:01,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 11:45:01,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 11:45:01,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-18 11:45:01,527 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 11:45:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:01,621 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-03-18 11:45:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 11:45:01,622 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 30 [2022-03-18 11:45:01,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:01,622 INFO L225 Difference]: With dead ends: 72 [2022-03-18 11:45:01,622 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 11:45:01,623 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-18 11:45:01,623 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:01,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 94 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:45:01,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 11:45:01,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-03-18 11:45:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 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 11:45:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-18 11:45:01,628 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2022-03-18 11:45:01,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:01,628 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-18 11:45:01,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 11:45:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-18 11:45:01,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 11:45:01,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:01,629 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:01,661 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 11:45:01,845 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 11:45:01,845 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:01,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 1 times [2022-03-18 11:45:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:01,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504347978] [2022-03-18 11:45:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:01,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:01,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 11:45:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504347978] [2022-03-18 11:45:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504347978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824834321] [2022-03-18 11:45:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:01,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:01,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:01,928 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 11:45:01,929 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 11:45:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 11:45:01,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 11:45:02,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 11:45:02,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824834321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:45:02,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:45:02,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2022-03-18 11:45:02,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872902282] [2022-03-18 11:45:02,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:45:02,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 11:45:02,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 11:45:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-18 11:45:02,091 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:02,408 INFO L93 Difference]: Finished difference Result 211 states and 285 transitions. [2022-03-18 11:45:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 11:45:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 11:45:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:02,409 INFO L225 Difference]: With dead ends: 211 [2022-03-18 11:45:02,409 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 11:45:02,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-18 11:45:02,410 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 288 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:02,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 70 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 11:45:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 11:45:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 53. [2022-03-18 11:45:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2022-03-18 11:45:02,417 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 31 [2022-03-18 11:45:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:02,417 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2022-03-18 11:45:02,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2022-03-18 11:45:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 11:45:02,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:02,418 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:02,441 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 11:45:02,638 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 11:45:02,639 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash 827339542, now seen corresponding path program 2 times [2022-03-18 11:45:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865787801] [2022-03-18 11:45:02,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:02,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 11:45:02,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865787801] [2022-03-18 11:45:02,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865787801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:02,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164761989] [2022-03-18 11:45:02,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:45:02,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:02,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:02,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:02,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 11:45:02,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:45:02,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:45:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 11:45:02,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-18 11:45:02,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 11:45:02,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164761989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:45:02,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:45:02,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-03-18 11:45:02,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201881872] [2022-03-18 11:45:02,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:45:02,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 11:45:02,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:02,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 11:45:02,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 11:45:02,970 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:03,771 INFO L93 Difference]: Finished difference Result 363 states and 501 transitions. [2022-03-18 11:45:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 11:45:03,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 11:45:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:03,773 INFO L225 Difference]: With dead ends: 363 [2022-03-18 11:45:03,773 INFO L226 Difference]: Without dead ends: 321 [2022-03-18 11:45:03,774 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 11:45:03,774 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 899 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:03,774 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 70 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 11:45:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-18 11:45:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 57. [2022-03-18 11:45:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 52 states have internal predecessors, (67), 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 11:45:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2022-03-18 11:45:03,783 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 35 [2022-03-18 11:45:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:03,783 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2022-03-18 11:45:03,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2022-03-18 11:45:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 11:45:03,784 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:03,784 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:03,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:03,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:04,000 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:04,000 INFO L85 PathProgramCache]: Analyzing trace with hash 564811463, now seen corresponding path program 1 times [2022-03-18 11:45:04,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:04,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992323894] [2022-03-18 11:45:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:04,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:04,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 11:45:04,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:04,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992323894] [2022-03-18 11:45:04,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992323894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:04,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385959238] [2022-03-18 11:45:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:04,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:04,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:04,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:04,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 11:45:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 11:45:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 11:45:04,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 11:45:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385959238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:45:04,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 11:45:04,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-03-18 11:45:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506971560] [2022-03-18 11:45:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:45:04,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 11:45:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 11:45:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 11:45:04,225 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 11:45:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:04,241 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2022-03-18 11:45:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 11:45:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 38 [2022-03-18 11:45:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:04,242 INFO L225 Difference]: With dead ends: 100 [2022-03-18 11:45:04,242 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 11:45:04,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 11:45:04,243 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:04,243 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:45:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 11:45:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2022-03-18 11:45:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 56 states have internal predecessors, (71), 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 11:45:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2022-03-18 11:45:04,250 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 38 [2022-03-18 11:45:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:04,251 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2022-03-18 11:45:04,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 11:45:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2022-03-18 11:45:04,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 11:45:04,251 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:04,251 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:04,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:04,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:04,468 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:04,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1141850809, now seen corresponding path program 3 times [2022-03-18 11:45:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:04,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227101409] [2022-03-18 11:45:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:04,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 11:45:04,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227101409] [2022-03-18 11:45:04,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227101409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116224895] [2022-03-18 11:45:04,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 11:45:04,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:04,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:04,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 11:45:04,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 11:45:04,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:45:04,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 11:45:04,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:04,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 11:45:04,853 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 11:45:04,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-03-18 11:45:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 11:45:04,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:05,006 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-18 11:45:05,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-03-18 11:45:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 11:45:05,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116224895] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:05,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-18 11:45:05,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 10] total 20 [2022-03-18 11:45:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554408217] [2022-03-18 11:45:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:45:05,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 11:45:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 11:45:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-03-18 11:45:05,030 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 11:45:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:05,115 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2022-03-18 11:45:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 11:45:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 39 [2022-03-18 11:45:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:05,116 INFO L225 Difference]: With dead ends: 96 [2022-03-18 11:45:05,116 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 11:45:05,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-03-18 11:45:05,117 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 30 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:05,117 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 114 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:45:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 11:45:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2022-03-18 11:45:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 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 11:45:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-03-18 11:45:05,124 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 39 [2022-03-18 11:45:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:05,124 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-03-18 11:45:05,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 11:45:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-03-18 11:45:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 11:45:05,124 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:05,124 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:05,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:05,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 11:45:05,342 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:05,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1453651082, now seen corresponding path program 1 times [2022-03-18 11:45:05,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:05,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499358252] [2022-03-18 11:45:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:05,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 11:45:05,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:05,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499358252] [2022-03-18 11:45:05,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499358252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:05,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004360570] [2022-03-18 11:45:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:05,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:05,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:05,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:05,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 11:45:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:05,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 11:45:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 11:45:05,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 11:45:05,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004360570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:45:05,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:45:05,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 17 [2022-03-18 11:45:05,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198954988] [2022-03-18 11:45:05,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:45:05,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 11:45:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:05,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 11:45:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-18 11:45:05,665 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:06,844 INFO L93 Difference]: Finished difference Result 391 states and 526 transitions. [2022-03-18 11:45:06,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 11:45:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 11:45:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:06,847 INFO L225 Difference]: With dead ends: 391 [2022-03-18 11:45:06,847 INFO L226 Difference]: Without dead ends: 342 [2022-03-18 11:45:06,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1891, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 11:45:06,849 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 774 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:06,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 154 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 11:45:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-18 11:45:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 74. [2022-03-18 11:45:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 69 states have internal predecessors, (88), 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 11:45:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2022-03-18 11:45:06,861 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 41 [2022-03-18 11:45:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:06,861 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2022-03-18 11:45:06,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 15 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2022-03-18 11:45:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 11:45:06,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:06,862 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:06,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:07,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:07,079 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 42701330, now seen corresponding path program 1 times [2022-03-18 11:45:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984829315] [2022-03-18 11:45:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-18 11:45:07,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:07,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984829315] [2022-03-18 11:45:07,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984829315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:07,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37842002] [2022-03-18 11:45:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:07,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:07,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:07,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:07,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 11:45:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:07,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 11:45:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:07,463 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-18 11:45:07,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-18 11:45:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-18 11:45:07,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:07,716 INFO L356 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2022-03-18 11:45:07,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-03-18 11:45:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 11:45:07,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37842002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:45:07,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:45:07,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2022-03-18 11:45:07,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890580419] [2022-03-18 11:45:07,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:45:07,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 11:45:07,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:07,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 11:45:07,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-18 11:45:07,927 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:09,215 INFO L93 Difference]: Finished difference Result 528 states and 713 transitions. [2022-03-18 11:45:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 11:45:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 11:45:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:09,219 INFO L225 Difference]: With dead ends: 528 [2022-03-18 11:45:09,219 INFO L226 Difference]: Without dead ends: 469 [2022-03-18 11:45:09,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=490, Invalid=1960, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 11:45:09,220 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 754 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:09,220 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 109 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 11:45:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-03-18 11:45:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 100. [2022-03-18 11:45:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 95 states have internal predecessors, (121), 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 11:45:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-03-18 11:45:09,245 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 43 [2022-03-18 11:45:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:09,245 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-03-18 11:45:09,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 21 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-03-18 11:45:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 11:45:09,247 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:09,247 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:09,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:09,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 11:45:09,459 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1964210228, now seen corresponding path program 1 times [2022-03-18 11:45:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:09,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877677374] [2022-03-18 11:45:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:09,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 11:45:09,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:09,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877677374] [2022-03-18 11:45:09,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877677374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:09,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576685519] [2022-03-18 11:45:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:09,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:09,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:09,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:09,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 11:45:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:09,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 11:45:09,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:09,803 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-18 11:45:09,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-03-18 11:45:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-18 11:45:09,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:10,017 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-03-18 11:45:10,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-03-18 11:45:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 11:45:10,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576685519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:45:10,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:45:10,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 9] total 19 [2022-03-18 11:45:10,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496888448] [2022-03-18 11:45:10,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:45:10,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 11:45:10,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:10,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 11:45:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-03-18 11:45:10,252 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:10,855 INFO L93 Difference]: Finished difference Result 316 states and 435 transitions. [2022-03-18 11:45:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 11:45:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 11:45:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:10,856 INFO L225 Difference]: With dead ends: 316 [2022-03-18 11:45:10,856 INFO L226 Difference]: Without dead ends: 243 [2022-03-18 11:45:10,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 11:45:10,857 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 237 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:10,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 84 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 11:45:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-18 11:45:10,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 132. [2022-03-18 11:45:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.2677165354330708) internal successors, (161), 127 states have internal predecessors, (161), 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 11:45:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2022-03-18 11:45:10,878 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 45 [2022-03-18 11:45:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:10,878 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2022-03-18 11:45:10,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2022-03-18 11:45:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 11:45:10,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:10,879 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:10,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:11,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 11:45:11,095 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:11,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 2 times [2022-03-18 11:45:11,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:11,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764783789] [2022-03-18 11:45:11,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:11,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 11:45:11,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:11,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764783789] [2022-03-18 11:45:11,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764783789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014153736] [2022-03-18 11:45:11,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:45:11,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:11,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:11,308 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:11,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 11:45:11,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:45:11,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:45:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 11:45:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 11:45:11,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:45:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 11:45:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014153736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:45:11,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:45:11,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-03-18 11:45:11,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602095840] [2022-03-18 11:45:11,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:45:11,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 11:45:11,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:45:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 11:45:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-03-18 11:45:11,820 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:45:13,365 INFO L93 Difference]: Finished difference Result 503 states and 670 transitions. [2022-03-18 11:45:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 11:45:13,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-18 11:45:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:45:13,367 INFO L225 Difference]: With dead ends: 503 [2022-03-18 11:45:13,367 INFO L226 Difference]: Without dead ends: 497 [2022-03-18 11:45:13,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=2519, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 11:45:13,369 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 585 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2569 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:45:13,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 191 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2569 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 11:45:13,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-18 11:45:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 170. [2022-03-18 11:45:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 165 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2022-03-18 11:45:13,408 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 51 [2022-03-18 11:45:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:45:13,409 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2022-03-18 11:45:13,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 20 states have internal predecessors, (79), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:45:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2022-03-18 11:45:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 11:45:13,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:45:13,409 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:45:13,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:13,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 11:45:13,622 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:45:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:45:13,623 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 1 times [2022-03-18 11:45:13,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:45:13,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707848253] [2022-03-18 11:45:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:13,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:45:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:14,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:45:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-18 11:45:14,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:45:14,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707848253] [2022-03-18 11:45:14,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707848253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:45:14,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362758546] [2022-03-18 11:45:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:45:14,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:45:14,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:45:14,175 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:45:14,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 11:45:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:45:14,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 11:45:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:45:20,372 INFO L356 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-03-18 11:45:20,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-03-18 11:45:21,212 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-18 11:45:21,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 11:45:21,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 11:45:21,428 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:202) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:490) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:422) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:311) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:327) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:496) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-18 11:45:21,433 INFO L158 Benchmark]: Toolchain (without parser) took 23330.60ms. Allocated memory was 186.6MB in the beginning and 343.9MB in the end (delta: 157.3MB). Free memory was 127.0MB in the beginning and 168.8MB in the end (delta: -41.8MB). Peak memory consumption was 171.9MB. Max. memory is 8.0GB. [2022-03-18 11:45:21,433 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 186.6MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 11:45:21,433 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.81ms. Allocated memory was 186.6MB in the beginning and 238.0MB in the end (delta: 51.4MB). Free memory was 126.8MB in the beginning and 207.8MB in the end (delta: -81.1MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. [2022-03-18 11:45:21,434 INFO L158 Benchmark]: Boogie Preprocessor took 49.91ms. Allocated memory is still 238.0MB. Free memory was 207.8MB in the beginning and 206.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 11:45:21,434 INFO L158 Benchmark]: RCFGBuilder took 326.66ms. Allocated memory is still 238.0MB. Free memory was 206.2MB in the beginning and 191.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-03-18 11:45:21,434 INFO L158 Benchmark]: TraceAbstraction took 22667.80ms. Allocated memory was 238.0MB in the beginning and 343.9MB in the end (delta: 105.9MB). Free memory was 191.0MB in the beginning and 168.8MB in the end (delta: 22.3MB). Peak memory consumption was 184.3MB. Max. memory is 8.0GB. [2022-03-18 11:45:21,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 186.6MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 268.81ms. Allocated memory was 186.6MB in the beginning and 238.0MB in the end (delta: 51.4MB). Free memory was 126.8MB in the beginning and 207.8MB in the end (delta: -81.1MB). Peak memory consumption was 15.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 49.91ms. Allocated memory is still 238.0MB. Free memory was 207.8MB in the beginning and 206.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 326.66ms. Allocated memory is still 238.0MB. Free memory was 206.2MB in the beginning and 191.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 22667.80ms. Allocated memory was 238.0MB in the beginning and 343.9MB in the end (delta: 105.9MB). Free memory was 191.0MB in the beginning and 168.8MB in the end (delta: 22.3MB). Peak memory consumption was 184.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:202) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-18 11:45:21,452 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...