/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/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 09:26:18,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 09:26:18,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 09:26:18,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 09:26:18,642 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 [2022-03-17 09:26:18,667 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 09:26:18,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 09:26:18,667 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-17 09:26:18,667 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-17 09:26:18,668 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 09:26:18,668 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 09:26:18,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 09:26:18,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 09:26:18,669 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 09:26:18,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 09:26:18,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 09:26:18,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 09:26:18,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 09:26:18,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 09:26:18,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-17 09:26:18,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-17 09:26:18,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 09:26:18,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 09:26:18,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 09:26:18,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 09:26:18,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 09:26:18,910 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 09:26:18,910 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 09:26:18,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2022-03-17 09:26:18,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9f4b791/ebc276b365974473b13f483b2b9272b3/FLAG684966aa0 [2022-03-17 09:26:19,319 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 09:26:19,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2022-03-17 09:26:19,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9f4b791/ebc276b365974473b13f483b2b9272b3/FLAG684966aa0 [2022-03-17 09:26:19,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a9f4b791/ebc276b365974473b13f483b2b9272b3 [2022-03-17 09:26:19,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 09:26:19,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-17 09:26:19,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 09:26:19,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 09:26:19,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 09:26:19,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4110ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19, skipping insertion in model container [2022-03-17 09:26:19,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 09:26:19,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 09:26:19,498 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2022-03-17 09:26:19,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 09:26:19,525 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 09:26:19,535 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2022-03-17 09:26:19,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 09:26:19,549 INFO L208 MainTranslator]: Completed translation [2022-03-17 09:26:19,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19 WrapperNode [2022-03-17 09:26:19,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 09:26:19,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 09:26:19,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 09:26:19,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 09:26:19,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 09:26:19,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 09:26:19,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 09:26:19,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 09:26:19,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (1/1) ... [2022-03-17 09:26:19,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 09:26:19,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:26:19,628 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) [2022-03-17 09:26:19,631 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 [2022-03-17 09:26:19,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 09:26:19,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 09:26:19,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 09:26:19,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 09:26:19,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 09:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 09:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 09:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 09:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 09:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 09:26:19,711 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 09:26:19,712 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 09:26:19,781 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 09:26:19,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 09:26:19,785 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 09:26:19,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:26:19 BoogieIcfgContainer [2022-03-17 09:26:19,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 09:26:19,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 09:26:19,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 09:26:19,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 09:26:19,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:26:19" (1/3) ... [2022-03-17 09:26:19,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1acf146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:26:19, skipping insertion in model container [2022-03-17 09:26:19,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:26:19" (2/3) ... [2022-03-17 09:26:19,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1acf146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:26:19, skipping insertion in model container [2022-03-17 09:26:19,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:26:19" (3/3) ... [2022-03-17 09:26:19,792 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2022-03-17 09:26:19,795 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 09:26:19,795 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 09:26:19,823 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 09:26:19,827 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 [2022-03-17 09:26:19,827 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 09:26:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-17 09:26:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 09:26:19,839 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:19,839 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:19,840 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:19,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2022-03-17 09:26:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:19,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310855368] [2022-03-17 09:26:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:19,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:19,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:26:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:19,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:26:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310855368] [2022-03-17 09:26:19,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310855368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 09:26:19,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 09:26:19,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 09:26:19,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165400551] [2022-03-17 09:26:19,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 09:26:19,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 09:26:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:26:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 09:26:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 09:26:20,013 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-17 09:26:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:26:20,035 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-17 09:26:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 09:26:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-17 09:26:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:26:20,040 INFO L225 Difference]: With dead ends: 31 [2022-03-17 09:26:20,040 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 09:26:20,041 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 [2022-03-17 09:26:20,044 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-03-17 09:26:20,044 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 09:26:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 09:26:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 09:26:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-03-17 09:26:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 09:26:20,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 09:26:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:26:20,063 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 09:26:20,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-17 09:26:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 09:26:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 09:26:20,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:20,064 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:20,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 09:26:20,064 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2022-03-17 09:26:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:20,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228818608] [2022-03-17 09:26:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:20,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:26:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:20,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:26:20,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228818608] [2022-03-17 09:26:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228818608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 09:26:20,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 09:26:20,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 09:26:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567545910] [2022-03-17 09:26:20,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 09:26:20,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 09:26:20,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:26:20,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 09:26:20,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 09:26:20,136 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-03-17 09:26:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:26:20,227 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-17 09:26:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 09:26:20,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-03-17 09:26:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:26:20,228 INFO L225 Difference]: With dead ends: 20 [2022-03-17 09:26:20,228 INFO L226 Difference]: Without dead ends: 15 [2022-03-17 09:26:20,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 09:26:20,229 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 09:26:20,230 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 09:26:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-17 09:26:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-17 09:26:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 09:26:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-17 09:26:20,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-17 09:26:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:26:20,234 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-17 09:26:20,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-03-17 09:26:20,235 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-17 09:26:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 09:26:20,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:20,235 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:20,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 09:26:20,235 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2022-03-17 09:26:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613015277] [2022-03-17 09:26:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:20,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:26:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:20,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:26:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613015277] [2022-03-17 09:26:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613015277] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 09:26:20,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 09:26:20,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 09:26:20,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812869494] [2022-03-17 09:26:20,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 09:26:20,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 09:26:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:26:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 09:26:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 09:26:20,280 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-17 09:26:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:26:20,309 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-03-17 09:26:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 09:26:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-17 09:26:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:26:20,311 INFO L225 Difference]: With dead ends: 25 [2022-03-17 09:26:20,311 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 09:26:20,312 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 09:26:20,315 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 09:26:20,315 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 09:26:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 09:26:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-17 09:26:20,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-03-17 09:26:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-17 09:26:20,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-03-17 09:26:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:26:20,319 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-17 09:26:20,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-03-17 09:26:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-17 09:26:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 09:26:20,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:20,320 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:20,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 09:26:20,320 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1968158987, now seen corresponding path program 1 times [2022-03-17 09:26:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044982193] [2022-03-17 09:26:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:26:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:20,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:26:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044982193] [2022-03-17 09:26:20,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044982193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:26:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102551450] [2022-03-17 09:26:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:20,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:26:20,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:26:20,459 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) [2022-03-17 09:26:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 09:26:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 09:26:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:26:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:20,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:26:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:20,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102551450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:26:20,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:26:20,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-17 09:26:20,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681225509] [2022-03-17 09:26:20,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:26:20,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 09:26:20,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:26:20,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 09:26:20,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-17 09:26:20,813 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2022-03-17 09:26:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:26:21,026 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-03-17 09:26:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 09:26:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 14 [2022-03-17 09:26:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:26:21,027 INFO L225 Difference]: With dead ends: 28 [2022-03-17 09:26:21,027 INFO L226 Difference]: Without dead ends: 22 [2022-03-17 09:26:21,028 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-03-17 09:26:21,029 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:26:21,029 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 41 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 09:26:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-17 09:26:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-17 09:26:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 09:26:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-17 09:26:21,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2022-03-17 09:26:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:26:21,034 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-17 09:26:21,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2022-03-17 09:26:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-17 09:26:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 09:26:21,035 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:21,035 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:21,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 09:26:21,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:26:21,256 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:21,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:21,256 INFO L85 PathProgramCache]: Analyzing trace with hash 80268138, now seen corresponding path program 1 times [2022-03-17 09:26:21,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:21,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935588813] [2022-03-17 09:26:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:21,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:26:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:26:21,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935588813] [2022-03-17 09:26:21,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935588813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:26:21,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668365385] [2022-03-17 09:26:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:21,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:26:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:26:21,299 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) [2022-03-17 09:26:21,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 09:26:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 09:26:21,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:26:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:21,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:26:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668365385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:26:21,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:26:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-17 09:26:21,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627978824] [2022-03-17 09:26:21,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:26:21,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 09:26:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:26:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 09:26:21,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-17 09:26:21,407 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 09:26:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:26:21,444 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-17 09:26:21,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 09:26:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-17 09:26:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:26:21,446 INFO L225 Difference]: With dead ends: 31 [2022-03-17 09:26:21,446 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 09:26:21,446 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-17 09:26:21,448 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 09:26:21,448 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 09:26:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 09:26:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-17 09:26:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 09:26:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-17 09:26:21,456 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-03-17 09:26:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:26:21,457 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-17 09:26:21,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 09:26:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-17 09:26:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 09:26:21,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:21,458 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:21,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 09:26:21,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:26:21,675 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1902707051, now seen corresponding path program 2 times [2022-03-17 09:26:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124090050] [2022-03-17 09:26:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:21,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:21,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 09:26:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 09:26:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 09:26:21,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 09:26:21,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124090050] [2022-03-17 09:26:21,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124090050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 09:26:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968918064] [2022-03-17 09:26:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 09:26:21,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:26:21,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 09:26:21,833 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) [2022-03-17 09:26:21,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 09:26:21,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 09:26:21,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 09:26:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 09:26:21,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 09:26:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 09:26:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 09:26:22,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968918064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 09:26:22,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 09:26:22,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-17 09:26:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613334844] [2022-03-17 09:26:22,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 09:26:22,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 09:26:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 09:26:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 09:26:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-17 09:26:22,318 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 28 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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) [2022-03-17 09:26:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 09:26:22,667 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-17 09:26:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 09:26:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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 20 [2022-03-17 09:26:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 09:26:22,672 INFO L225 Difference]: With dead ends: 34 [2022-03-17 09:26:22,672 INFO L226 Difference]: Without dead ends: 28 [2022-03-17 09:26:22,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 09:26:22,674 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 09:26:22,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 09:26:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-17 09:26:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-03-17 09:26:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-03-17 09:26:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-03-17 09:26:22,677 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-03-17 09:26:22,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 09:26:22,678 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-03-17 09:26:22,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 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) [2022-03-17 09:26:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-03-17 09:26:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 09:26:22,678 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 09:26:22,678 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 09:26:22,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 09:26:22,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 09:26:22,888 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 09:26:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 09:26:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 116795146, now seen corresponding path program 2 times [2022-03-17 09:26:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 09:26:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132207120] [2022-03-17 09:26:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 09:26:22,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 09:26:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 09:26:22,912 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 09:26:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 09:26:22,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 09:26:22,934 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 09:26:22,935 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 09:26:22,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-17 09:26:22,939 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-03-17 09:26:22,941 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 09:26:22,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:26:22 BoogieIcfgContainer [2022-03-17 09:26:22,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 09:26:22,960 INFO L158 Benchmark]: Toolchain (without parser) took 3620.55ms. Allocated memory was 183.5MB in the beginning and 266.3MB in the end (delta: 82.8MB). Free memory was 128.7MB in the beginning and 118.9MB in the end (delta: 9.8MB). Peak memory consumption was 92.5MB. Max. memory is 8.0GB. [2022-03-17 09:26:22,960 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory was 144.9MB in the beginning and 144.9MB in the end (delta: 72.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 09:26:22,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.53ms. Allocated memory was 183.5MB in the beginning and 266.3MB in the end (delta: 82.8MB). Free memory was 128.6MB in the beginning and 237.6MB in the end (delta: -109.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-17 09:26:22,960 INFO L158 Benchmark]: Boogie Preprocessor took 27.84ms. Allocated memory is still 266.3MB. Free memory was 237.6MB in the beginning and 236.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 09:26:22,961 INFO L158 Benchmark]: RCFGBuilder took 206.46ms. Allocated memory is still 266.3MB. Free memory was 236.1MB in the beginning and 226.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 09:26:22,961 INFO L158 Benchmark]: TraceAbstraction took 3171.79ms. Allocated memory is still 266.3MB. Free memory was 225.7MB in the beginning and 118.9MB in the end (delta: 106.8MB). Peak memory consumption was 107.8MB. Max. memory is 8.0GB. [2022-03-17 09:26:22,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory was 144.9MB in the beginning and 144.9MB in the end (delta: 72.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.53ms. Allocated memory was 183.5MB in the beginning and 266.3MB in the end (delta: 82.8MB). Free memory was 128.6MB in the beginning and 237.6MB in the end (delta: -109.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.84ms. Allocated memory is still 266.3MB. Free memory was 237.6MB in the beginning and 236.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 206.46ms. Allocated memory is still 266.3MB. Free memory was 236.1MB in the beginning and 226.2MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3171.79ms. Allocated memory is still 266.3MB. Free memory was 225.7MB in the beginning and 118.9MB in the end (delta: 106.8MB). Peak memory consumption was 107.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=1, n=2, n=4] [L26] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L24] i++ VAL [i=2, n=4, n=2] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=2, n=4, n=4] [L26] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=3, n=4, n=6] [L26] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L24] i++ VAL [i=4, n=4, n=6] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=4, n=4, n=8] [L26] COND TRUE i==4 [L26] sn=-10 VAL [i=4, n=-10, n=4] [L24] i++ VAL [i=5, n=-10, n=4] [L24] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 109 mSDsluCounter, 192 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 118 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 375 IncrementalHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 74 mSDtfsCounter, 375 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1017 SizeOfPredicates, 6 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 11/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-17 09:26:22,993 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...