/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-04 20:05:52,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-04 20:05:52,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-04 20:05:52,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-04 20:05:52,882 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 [2022-04-04 20:05:52,911 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-04 20:05:52,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-04 20:05:52,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-04 20:05:52,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-04 20:05:52,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-04 20:05:52,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-04 20:05:52,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-04 20:05:52,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-04 20:05:52,913 INFO L138 SettingsManager]: * Use SBE=true [2022-04-04 20:05:52,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-04 20:05:52,914 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-04 20:05:52,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-04 20:05:52,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-04 20:05:52,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-04 20:05:52,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-04 20:05:52,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-04 20:05:52,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-04 20:05:52,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-04 20:05:52,917 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-04 20:05:52,917 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-04 20:05:52,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-04 20:05:52,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-04 20:05:52,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-04 20:05:52,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-04 20:05:52,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 20:05:52,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-04 20:05:52,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-04 20:05:52,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-04 20:05:52,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-04 20:05:52,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-04 20:05:52,919 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-04 20:05:52,919 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-04 20:05:52,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-04 20:05:52,919 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-04 20:05:53,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-04 20:05:53,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-04 20:05:53,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-04 20:05:53,154 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-04 20:05:53,154 INFO L275 PluginConnector]: CDTParser initialized [2022-04-04 20:05:53,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2022-04-04 20:05:53,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee10c5766/97e67db92d394592a5cc2a135c4ad9d5/FLAG132ec8900 [2022-04-04 20:05:53,588 INFO L306 CDTParser]: Found 1 translation units. [2022-04-04 20:05:53,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2022-04-04 20:05:53,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee10c5766/97e67db92d394592a5cc2a135c4ad9d5/FLAG132ec8900 [2022-04-04 20:05:53,602 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee10c5766/97e67db92d394592a5cc2a135c4ad9d5 [2022-04-04 20:05:53,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-04 20:05:53,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-04 20:05:53,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-04 20:05:53,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-04 20:05:53,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-04 20:05:53,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@158fe871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53, skipping insertion in model container [2022-04-04 20:05:53,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-04 20:05:53,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-04 20:05:53,764 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c[321,334] [2022-04-04 20:05:53,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 20:05:53,785 INFO L203 MainTranslator]: Completed pre-run [2022-04-04 20:05:53,792 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-1.c[321,334] [2022-04-04 20:05:53,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-04 20:05:53,806 INFO L208 MainTranslator]: Completed translation [2022-04-04 20:05:53,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53 WrapperNode [2022-04-04 20:05:53,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-04 20:05:53,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-04 20:05:53,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-04 20:05:53,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-04 20:05:53,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-04 20:05:53,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-04 20:05:53,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-04 20:05:53,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-04 20:05:53,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (1/1) ... [2022-04-04 20:05:53,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-04 20:05:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:05:53,855 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) [2022-04-04 20:05:53,871 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 [2022-04-04 20:05:53,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-04 20:05:53,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-04 20:05:53,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-04 20:05:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-04 20:05:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-04 20:05:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-04 20:05:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-04 20:05:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-04 20:05:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-04 20:05:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-04 20:05:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-04 20:05:53,936 INFO L234 CfgBuilder]: Building ICFG [2022-04-04 20:05:53,937 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-04 20:05:54,028 INFO L275 CfgBuilder]: Performing block encoding [2022-04-04 20:05:54,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-04 20:05:54,033 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-04 20:05:54,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 08:05:54 BoogieIcfgContainer [2022-04-04 20:05:54,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-04 20:05:54,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-04 20:05:54,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-04 20:05:54,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-04 20:05:54,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.04 08:05:53" (1/3) ... [2022-04-04 20:05:54,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303c92a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 08:05:54, skipping insertion in model container [2022-04-04 20:05:54,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.04 08:05:53" (2/3) ... [2022-04-04 20:05:54,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303c92a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.04 08:05:54, skipping insertion in model container [2022-04-04 20:05:54,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.04 08:05:54" (3/3) ... [2022-04-04 20:05:54,041 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2022-04-04 20:05:54,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-04 20:05:54,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-04 20:05:54,083 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-04 20:05:54,090 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 [2022-04-04 20:05:54,090 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-04 20:05:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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) [2022-04-04 20:05:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-04 20:05:54,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:05:54,107 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:05:54,107 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:05:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:05:54,112 INFO L85 PathProgramCache]: Analyzing trace with hash -531959740, now seen corresponding path program 1 times [2022-04-04 20:05:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:05:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753035828] [2022-04-04 20:05:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:05:54,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:05:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 20:05:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:54,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:05:54,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753035828] [2022-04-04 20:05:54,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753035828] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 20:05:54,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 20:05:54,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-04 20:05:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699726280] [2022-04-04 20:05:54,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 20:05:54,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-04 20:05:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:05:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-04 20:05:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-04 20:05:54,348 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-04-04 20:05:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:05:54,378 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-04-04 20:05:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-04 20:05:54,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-04-04 20:05:54,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:05:54,385 INFO L225 Difference]: With dead ends: 50 [2022-04-04 20:05:54,386 INFO L226 Difference]: Without dead ends: 23 [2022-04-04 20:05:54,388 INFO L912 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 [2022-04-04 20:05:54,391 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 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 [2022-04-04 20:05:54,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 20:05:54,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-04 20:05:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-04 20:05:54,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-04 20:05:54,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-04-04 20:05:54,441 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2022-04-04 20:05:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:05:54,442 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-04-04 20:05:54,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-04-04 20:05:54,442 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-04-04 20:05:54,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-04 20:05:54,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:05:54,443 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:05:54,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-04 20:05:54,443 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:05:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:05:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash -537500866, now seen corresponding path program 1 times [2022-04-04 20:05:54,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:05:54,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051669625] [2022-04-04 20:05:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:05:54,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:05:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 20:05:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:54,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:05:54,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051669625] [2022-04-04 20:05:54,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051669625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 20:05:54,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-04 20:05:54,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-04 20:05:54,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867822834] [2022-04-04 20:05:54,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 20:05:54,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-04 20:05:54,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:05:54,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-04 20:05:54,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-04 20:05:54,630 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-04-04 20:05:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:05:54,682 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-04-04 20:05:54,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-04 20:05:54,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-04-04 20:05:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:05:54,683 INFO L225 Difference]: With dead ends: 49 [2022-04-04 20:05:54,683 INFO L226 Difference]: Without dead ends: 32 [2022-04-04 20:05:54,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-04 20:05:54,687 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 20:05:54,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-04 20:05:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-04 20:05:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-04-04 20:05:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-04 20:05:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-04-04 20:05:54,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2022-04-04 20:05:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:05:54,705 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-04-04 20:05:54,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-04-04 20:05:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-04-04 20:05:54,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-04 20:05:54,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:05:54,713 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:05:54,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-04 20:05:54,713 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:05:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:05:54,714 INFO L85 PathProgramCache]: Analyzing trace with hash -509289700, now seen corresponding path program 1 times [2022-04-04 20:05:54,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:05:54,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679583001] [2022-04-04 20:05:54,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:05:54,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:05:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 20:05:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:05:54,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679583001] [2022-04-04 20:05:54,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679583001] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 20:05:54,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525178685] [2022-04-04 20:05:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:05:54,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:05:54,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:05:54,855 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) [2022-04-04 20:05:54,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-04 20:05:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-04 20:05:54,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:05:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:55,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:05:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525178685] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:05:55,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 20:05:55,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-04 20:05:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557411306] [2022-04-04 20:05:55,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 20:05:55,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-04 20:05:55,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:05:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-04 20:05:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-04 20:05:55,113 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 20:05:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:05:55,234 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-04-04 20:05:55,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-04 20:05:55,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-04 20:05:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:05:55,235 INFO L225 Difference]: With dead ends: 55 [2022-04-04 20:05:55,235 INFO L226 Difference]: Without dead ends: 37 [2022-04-04 20:05:55,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-04-04 20:05:55,237 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-04 20:05:55,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 36 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-04 20:05:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-04 20:05:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-04-04 20:05:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-04 20:05:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-04 20:05:55,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-04-04 20:05:55,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:05:55,246 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-04 20:05:55,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 20:05:55,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-04 20:05:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-04 20:05:55,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:05:55,247 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:05:55,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-04 20:05:55,463 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 [2022-04-04 20:05:55,464 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:05:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:05:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1312242250, now seen corresponding path program 2 times [2022-04-04 20:05:55,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:05:55,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110541778] [2022-04-04 20:05:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:05:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:05:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:55,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 20:05:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:55,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:05:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110541778] [2022-04-04 20:05:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110541778] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 20:05:55,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105110127] [2022-04-04 20:05:55,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-04 20:05:55,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:05:55,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:05:55,602 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) [2022-04-04 20:05:55,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-04 20:05:55,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-04 20:05:55,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 20:05:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-04 20:05:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:05:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:55,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-04 20:05:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:55,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105110127] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-04 20:05:55,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-04 20:05:55,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-04 20:05:55,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056044809] [2022-04-04 20:05:55,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-04 20:05:55,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-04 20:05:55,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:05:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-04 20:05:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-04 20:05:55,877 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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) [2022-04-04 20:05:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:05:56,341 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-04-04 20:05:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-04 20:05:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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 23 [2022-04-04 20:05:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:05:56,343 INFO L225 Difference]: With dead ends: 73 [2022-04-04 20:05:56,343 INFO L226 Difference]: Without dead ends: 49 [2022-04-04 20:05:56,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2022-04-04 20:05:56,344 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-04 20:05:56,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 51 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-04 20:05:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-04 20:05:56,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-04-04 20:05:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-04 20:05:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-04-04 20:05:56,351 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-04-04 20:05:56,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:05:56,351 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-04-04 20:05:56,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 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) [2022-04-04 20:05:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-04-04 20:05:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-04 20:05:56,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-04 20:05:56,352 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-04 20:05:56,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-04 20:05:56,574 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 [2022-04-04 20:05:56,575 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-04 20:05:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-04 20:05:56,575 INFO L85 PathProgramCache]: Analyzing trace with hash -759453590, now seen corresponding path program 3 times [2022-04-04 20:05:56,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-04 20:05:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052974791] [2022-04-04 20:05:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-04 20:05:56,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-04 20:05:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:56,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-04 20:05:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-04 20:05:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-04 20:05:56,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-04 20:05:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052974791] [2022-04-04 20:05:56,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052974791] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-04 20:05:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404275075] [2022-04-04 20:05:56,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-04 20:05:56,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-04 20:05:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-04 20:05:56,866 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) [2022-04-04 20:05:56,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-04 20:05:56,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-04 20:05:56,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-04 20:05:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-04 20:05:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-04 20:05:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-04 20:05:57,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-04 20:05:57,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404275075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-04 20:05:57,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-04 20:05:57,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 21 [2022-04-04 20:05:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091857521] [2022-04-04 20:05:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-04 20:05:57,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-04 20:05:57,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-04 20:05:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-04 20:05:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-04 20:05:57,325 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 20:05:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-04 20:05:57,392 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-04-04 20:05:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-04 20:05:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-04 20:05:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-04 20:05:57,393 INFO L225 Difference]: With dead ends: 49 [2022-04-04 20:05:57,394 INFO L226 Difference]: Without dead ends: 0 [2022-04-04 20:05:57,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-04-04 20:05:57,395 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-04 20:05:57,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-04-04 20:05:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-04 20:05:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-04 20:05:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-04 20:05:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-04 20:05:57,396 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-04-04 20:05:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-04 20:05:57,396 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-04 20:05:57,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-04 20:05:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-04 20:05:57,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-04 20:05:57,399 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-04 20:05:57,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-04 20:05:57,604 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 [2022-04-04 20:05:57,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-04 20:05:57,731 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-04-04 20:05:57,731 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-04-04 20:05:57,731 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-04-04 20:05:57,732 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-04 20:05:57,732 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-04 20:05:57,732 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-04 20:05:57,732 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-04 20:05:57,732 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-04 20:05:57,732 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-04 20:05:57,732 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-04 20:05:57,732 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2022-04-04 20:05:57,733 INFO L882 garLoopResultBuilder]: For program point L23-2(line 23) no Hoare annotation was computed. [2022-04-04 20:05:57,733 INFO L878 garLoopResultBuilder]: At program point L23-3(line 23) the Hoare annotation is: (or (= main_~v~0 0) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2022-04-04 20:05:57,733 INFO L878 garLoopResultBuilder]: At program point L23-4(line 23) the Hoare annotation is: (and (not (< (mod main_~v~0 4294967296) 10)) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2022-04-04 20:05:57,733 INFO L882 garLoopResultBuilder]: For program point L19-2(lines 19 25) no Hoare annotation was computed. [2022-04-04 20:05:57,733 INFO L878 garLoopResultBuilder]: At program point L19-3(lines 19 25) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2022-04-04 20:05:57,733 INFO L882 garLoopResultBuilder]: For program point L19-4(lines 19 25) no Hoare annotation was computed. [2022-04-04 20:05:57,733 INFO L882 garLoopResultBuilder]: For program point L24(lines 22 25) no Hoare annotation was computed. [2022-04-04 20:05:57,733 INFO L882 garLoopResultBuilder]: For program point L20-2(lines 20 25) no Hoare annotation was computed. [2022-04-04 20:05:57,733 INFO L878 garLoopResultBuilder]: At program point L20-3(lines 20 25) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2022-04-04 20:05:57,734 INFO L882 garLoopResultBuilder]: For program point L21-2(lines 21 25) no Hoare annotation was computed. [2022-04-04 20:05:57,734 INFO L878 garLoopResultBuilder]: At program point L21-3(lines 21 25) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2022-04-04 20:05:57,734 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2022-04-04 20:05:57,734 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2022-04-04 20:05:57,734 INFO L878 garLoopResultBuilder]: At program point L22-2(lines 22 25) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2022-04-04 20:05:57,734 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-04-04 20:05:57,734 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-04-04 20:05:57,734 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-04-04 20:05:57,734 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-04-04 20:05:57,734 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-04-04 20:05:57,735 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-04-04 20:05:57,737 INFO L719 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-04-04 20:05:57,739 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-04 20:05:57,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.04 08:05:57 BoogieIcfgContainer [2022-04-04 20:05:57,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-04 20:05:57,760 INFO L158 Benchmark]: Toolchain (without parser) took 4155.09ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 128.2MB in the beginning and 176.0MB in the end (delta: -47.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-04 20:05:57,761 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 178.3MB. Free memory was 145.0MB in the beginning and 144.9MB in the end (delta: 85.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-04 20:05:57,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.97ms. Allocated memory is still 178.3MB. Free memory was 128.0MB in the beginning and 156.4MB in the end (delta: -28.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-04 20:05:57,761 INFO L158 Benchmark]: Boogie Preprocessor took 22.04ms. Allocated memory is still 178.3MB. Free memory was 156.4MB in the beginning and 154.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-04 20:05:57,761 INFO L158 Benchmark]: RCFGBuilder took 205.60ms. Allocated memory is still 178.3MB. Free memory was 154.9MB in the beginning and 144.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-04 20:05:57,762 INFO L158 Benchmark]: TraceAbstraction took 3723.59ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 143.9MB in the beginning and 176.0MB in the end (delta: -32.0MB). Peak memory consumption was 4.8MB. Max. memory is 8.0GB. [2022-04-04 20:05:57,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 178.3MB. Free memory was 145.0MB in the beginning and 144.9MB in the end (delta: 85.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.97ms. Allocated memory is still 178.3MB. Free memory was 128.0MB in the beginning and 156.4MB in the end (delta: -28.4MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.04ms. Allocated memory is still 178.3MB. Free memory was 156.4MB in the beginning and 154.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 205.60ms. Allocated memory is still 178.3MB. Free memory was 154.9MB in the beginning and 144.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3723.59ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 143.9MB in the beginning and 176.0MB in the end (delta: -32.0MB). Peak memory consumption was 4.8MB. 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.7s, OverallIterations: 5, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 232 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 227 mSDsluCounter, 286 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 153 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 310 IncrementalHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 133 mSDtfsCounter, 310 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, InterpolantAutomatonStates: 35, 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, 5 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 35 NumberOfFragments, 88 HoareAnnotationTreeSize, 15 FomulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 256 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 180 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 210 ConstructedInterpolants, 2 QuantifiedInterpolants, 651 SizeOfPredicates, 4 NumberOfNonLiveVariables, 234 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 100/251 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: v == 0 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 RESULT: Ultimate proved your program to be correct! [2022-04-04 20:05:57,791 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...